Why the Biggest Battery Company is Betting Against Lithium

Summary

In this episode, Matt Ferrell dives into the emerging trend of sodium-ion batteries and why the world's largest lithium battery manufacturer, CATL, is making a surprising shift towards them. Despite the lower energy density compared to lithium-ion batteries, sodium-ion technology offers significant advantages in terms of cost, sustainability, and safety. With companies like CATL, BYD, and Natron Energy investing heavily in this technology, the video explores whether sodium-ion batteries could be the next big thing in energy storage.

Highlights

• CATL, a leader in lithium batteries, now supports the shift to sodium due to cost benefits 🌍.
• Sodium-ion batteries, although less energy-dense, are cheaper and more sustainable than lithium 😲.
• Major companies are investing in sodium technologies, marking a potential market shift 🏭.
• Sodium batteries show better resistance to temperature variations, offering safety advantages 🔥.
• Despite hurdles, sodium-ion technology could transform energy storage solutions globally 🌐.

Key Takeaways

• Sodium-ion batteries are becoming a hot topic, with CATL betting big on their potential 🔋.
• Despite lower energy density, sodium batteries are cheaper and more sustainable than lithium ☀️.
• Big players like BYD and Natron are investing heavily in sodium-ion technology 🌎.
• SIBs offer safety benefits with better resistance to temperature extremes 🔥.
• Challenges remain for sodium-ion batteries, but the potential is significant for the future 🚀.

Overview

In a bold move, CATL—the world’s largest lithium battery manufacturer—has started betting on sodium-ion batteries. This surprising shift is not just a repulsion against lithium, but a strategic pivot towards more cost-effective and environmentally friendly solutions. Sodium, after all, is abundant, easy to obtain, and offers a cheaper alternative without drastically sacrificing efficiency.

The video navigates through several companies like BYD and Natron Energy that are hot on CATL's trails by ramping up their sodium-ion battery production. This ideation caters to a wider belief in the potential market shift where sodium could take a massive share from the previously dominated lithium market, despite challenges like lower energy density.

While there are still skeptics about sodium-ion batteries' role in the electric vehicles sector, their advantages, especially in extreme temperatures, make them an attractive replacement for certain applications. The future of SIBs may hold a significant place in energy storage, and given the drive and investment by large global companies, this might be a revolution in waiting.

Chapters

• 00:00 - 00:30: Introduction and Sodium-Ion Batteries The chapter discusses the growing interest and potential market shift towards sodium-ion battery technology. CATL, the largest lithium battery manufacturer, suggests that up to half the market could transition to sodium, which is nearly as efficient as lithium and more cost-effective due to the abundance of salt. This indicates a significant potential change in the battery market landscape.
• 00:30 - 01:30: CATL Perspective and Sodium-Ion Advancements The chapter titled 'CATL Perspective and Sodium-Ion Advancements' begins by questioning whether sodium-ion technology will be the future of energy storage or remain overshadowed by lithium-ion technology. The speaker, Matt Ferrell, introduces the topic, highlighting CATL's significant market presence, as they constituted around 40% of the global battery market in 2023. Given CATL's profound influence and market share, their perspective on battery technology advancements is deemed crucial.
• 01:30 - 02:30: Understanding Sodium-Ion and Industry Excitement In an interview with Reuters, CATL co-founder Robin Zeng discusses the potential of sodium-ion batteries as a better alternative to solid-state batteries, which are often considered the next big technological breakthrough. He believes sodium-ion batteries could potentially replace up to half of the current market share dominated by CATL. Despite concerns about sodium's lower energy density, leading to bulkier batteries, CATL is already integrating sodium batteries with lithium batteries in its Freevoy battery pack for long-range electric vehicles.
• 02:30 - 03:30: Safety and Efficiency of Sodium-Ion Batteries The chapter discusses the developments in sodium-ion batteries, particularly focusing on CATL's efforts. Despite sodium-ion batteries being heavier, innovations are underway to increase their efficiency and suitability for electric vehicles (EVs). CATL plans to release a second-generation sodium-ion battery with an energy density of over 200 Wh/kg, which, although lower than the best lithium-ion batteries, marks significant progress from its predecessor. The chapter suggests a potential market shift, as global companies are increasing sodium-ion battery production.
• 04:30 - 05:30: BYD's Expansion into Sodium-Ion Batteries The chapter discusses BYD's exploration into sodium-ion batteries (SIBs). The fundamental concept of SIBs is similar to lithium-ion batteries, as sodium behaves similarly to lithium, leading to comparable structures and round-trip efficiency (RTE). However, a key difference is the lower energy density of SIBs compared to their lithium-ion counterparts, which has historically restricted their use in various applications. The discussion also touches on the industry's perspective, particularly that of Robin Zeng, regarding the potential of these batteries.
• 12:00 - 14:30: Challenges Facing Sodium-Ion Adoption The battery industry is optimistic about Sodium-Ion Batteries (SIBs) because, despite being slightly less effective in certain aspects compared to lithium batteries, they offer several advantages. Sodium, the core element, is abundantly available, more so than lithium, and is easier to extract without destructive mining practices, making it cheaper and more sustainable. Additionally, SIBs are less susceptible to supply-chain issues and geopolitical tensions. They also possess excellent resistance to extreme temperatures, further enhancing their appeal.
• 14:30 - 15:00: Conclusion and Future Outlook for Sodium-Ion Batteries The concluding chapter highlights the advantages of sodium-ion batteries (SIBs) over lithium-ion batteries in specific scenarios. SIBs exhibit better performance in cold conditions and are considered safer in terms of thermal runaway, which is a rare but serious risk in lithium-ion batteries, especially when used in large-scale energy storage projects. This makes SIBs a suitable option for solar farms located in hot, dry, and wildfire-prone regions, like the U.S. Southwest and Australia. The electric vehicle (EV) industry is also taking an interest in SIBs due to their cold resistance.

Why the Biggest Battery Company is Betting Against Lithium Transcription

• 00:00 - 00:30 Sodium-ion battery technology isn’t exactly new,  but something interesting is happening. CATL,   the world’s biggest lithium battery manufacturer,   says that up to half the market could switch to  sodium. That’s right—the biggest name in lithium   batteries is betting against lithium. Looks like  lithium might need to recharge its reputation. After all, sodium-ion batteries  are nearly as good lithium,   and salt is much cheaper and easier  to access than lithium. So maybe its   not surprising that CATL and some other  companies are getting ready to manufacture   huge numbers of them in preparation for  what could be a massive market shift.
• 00:30 - 01:00 But is sodium really the future of energy storage,   or is it just another battery technology  destined to live in lithium-ion's shadow? I’m Matt Ferrell … welcome to Undecided. This video is brought to you by Surfshark. As I mentioned, CATL is the world’s largest  battery manufacturer. For perspective, in 2023,   CATL’s batteries made up around 40% of the global  market. That’s massive—and a good reason to take   the company’s views on battery tech seriously. So,  it’s pretty interesting that in a November 2024
• 01:00 - 01:30 interview with Reuters, CATL co-founder Robin  Zeng pushed back on the idea that solid-state   batteries are the next big thing. Instead,  he argued that sodium-ion batteries are the   better bet—one with the potential to replace up  to half of the market CATL currently dominates. And this isn’t just talk. CATL already offers  a sodium battery as part of its Freevoy battery   pack, a hybrid system combining lithium and sodium  batteries for long-range EVs. That’s surprising,   considering sodium’s biggest drawback—its  lower energy density—usually means bulkier,
• 01:30 - 02:00 heavier batteries. And in EVs,  every ounce and inch matters. But CATL isn’t stopping there. The company  is set to launch a second-generation sodium   battery later this year, claiming  an energy density of over 200 Wh/kg.   That’s still below today’s best  lithium-ion batteries at 300 Wh/kg,   but it’s a big leap from its predecessor’s  160 Wh/kg and a sign of serious progress. CATL isn’t alone in this push—companies worldwide  are ramping up sodium-ion battery production,   preparing for what could be a massive market  shift. But are sodium batteries truly the next
• 02:00 - 02:30 big thing? And if so, what potential does Robin  Zeng—and the rest of the industry—see in them? The concept behind sodium-ion batteries  (SIBs) is pretty straightforward. Sodium   behaves a lot like lithium, so SIBs share  essentially the same structure as their   lithium-ion cousins. They also have a  comparable round-trip efficiency (RTE),   meaning you get back nearly the same amount of  energy you put in. But there’s a tradeoff—SIBs   are less energy-dense than lithium-ion batteries,  which has historically limited their applications.
• 02:30 - 03:00 So why is the battery industry so  excited about SIBs if they’re almost   as good as lithium but still  lacking in key areas? Well,   salt is a lot more accommodating. It’s vastly  more abundant—there’s an entire ocean full of it.   It’s also easier to extract and doesn’t  require the destructive mining practices   needed for lithium and other precious metals.  All this makes SIBs cheaper, more sustainable,   and less vulnerable to supply-chain  disruptions and geopolitical tensions. Beyond cost and sustainability, SIBs have  other advantages. Their chemistry gives   them excellent resistance to extreme  temperatures. They’re less prone to
• 03:00 - 03:30 thermal runaway and actually perform better  in cold conditions than lithium-ion batteries. Now, to be fair, thermal runaway is  pretty rare in lithium-ion batteries—you   won’t have an issue unless you're dropping  your laptop or taking a sledgehammer to it.   But in large-scale energy storage, where  hundreds of batteries are packed together,   safety matters. If you’re setting up a solar  farm in a hot, dry, wildfire-prone region—say,   the U.S. Southwest or much of Australia—SIBs  might be the smarter, safer choice. That cold resistance is also why some  in the EV industry are paying attention,
• 03:30 - 04:00 despite SIBs’ energy-density shortcomings.  In freezing temperatures, lithium ions can   “get lost” on their way into the anode,  plating onto the outside instead, which   lowers efficiency or even causes a short. Sodium  batteries are more resistant to this problem.   Most lithium batteries start struggling at -20°C  (-4°F), while CATL claims its second-gen sodium   batteries can handle as low as -40°C (-40°F)—one  reason the company is eyeing them for EVs.
• 04:00 - 04:30 And if the world’s largest battery maker  getting serious about SIBs isn’t enough   to grab your attention, just wait until  you hear what the second-largest is up to. And speaking of staying plugged in, let’s talk  about staying secure online with today’s sponsor,   Surfshark VPN. I just got back from a trip to  a friend’s wedding, and between the airport   lounges and hotel Wi-Fi, I leaned heavily on  Surfshark VPN to keep my connection from going   icy cold in terms of security and privacy.  I’ve  been using Surfshark for what feels like forever   and get so much use out of it.  Surfshark is a  fast, easy to use VPN full of incredible features
• 04:30 - 05:00 that you can install on an unlimited number  of devices with one account. But … that’s not   all. Even shopping services will sometimes gate  prices based on your location, so you can change   your location to make sure you’re getting the best  deal. They also have add-ons to their VPN service   to unlock things like Surfshark Alert, which will  let you know if your email or personal details,   like passwords, have been leaked online in  a data breach. Right now they’re running a   special deal … go to surfshark.com/undecided  or use code Undecided at checkout to get   up to 4 additional months of Surfshark VPN.  Surfshark offers a 30-day money-back guarantee,
• 05:00 - 05:30 so there’s no risk to try it out for yourself.  I’ve been using Surfshark for years and love it.   Don’t miss out on this great deal. Link is in the  description below. Thanks to Surfshark and to all   of you for supporting the channel. So, if the  world’s largest battery maker getting serious   about SIBs isn’t enough to spark your curiosity,  let’s talk about the world’s second-largest. That would be BYD—CATL’s longtime rival. And  BYD is going big on sodium. The company broke   ground on a new gigafactory last year,  and once it’s fully operational in 2027,
• 05:30 - 06:00 it’s expected to crank out 30  gigawatt-hours of sodium-ion   batteries per year. Looks like BYD  is really seasoning the competition. This is part of BYD’s push to diversify its  energy storage portfolio and drive down the   cost of sodium batteries. The company says  its SIBs are already on track to match the   price of standard lithium iron phosphate  (LFP) batteries by 2025—and eventually,   as the technology matures, they  could be up to 70% cheaper. BYD is also rolling out its first utility-scale  sodium battery energy storage system (BESS),
• 06:00 - 06:30 the *MC Cube SIB Energy Storage System*.  (What a coincidence—MC Cube was my DJ name.)   The system boasts a power output of 1,155 kW  and a storage capacity of 2.3 MWh. That’s solid,   but still lower than the average lithium-ion  BESS, which typically holds around 5 MWh. So   the big questions are: Will sodium’s unique  advantages help it compete with existing   lithium systems? And will BYD’s predicted price  drop actually happen? If either answer is yes,
• 06:30 - 07:00 expect to see a lot more SIBs in the  near future. But for now, we wait. And BYD isn’t the only one making moves  in China. Zhejiang Hu Na Energy recently   announced the registration and coding of  its own sodium-ion production line. The   company can now produce 4 GWh of sodium-ion  battery cells and modules. And this is just   phase one. The company claims it will scale up  to 20 GWh of sodium-ion production capacity. Of course, they haven’t set a firm deadline for  that (so, take it with a few grains of sodium),
• 07:00 - 07:30 but it’s another signal that the  industry is shifting. And given   that the planet isn’t running out of  salt anytime soon… I sure hope it does. Of course, China isn’t the only player pushing  ahead with sodium-ion tech. In the U.S.,   California-based Natron Energy has developed  SIBs that allegedly charge and discharge 10   times faster than lithium-ion batteries. With an  estimated lifespan of 50,000 cycles, they sound   promising. But there’s a catch—Natron hasn’t  released weight-based energy density figures,   which is typically a weak spot for  SIBs. A 2022 Chemical & Engineering
• 07:30 - 08:00 News article put their energy density at just  70 Wh/kg—on the very low end of the sodium-ion   spectrum. While that’s fine for stationary  storage applications like data centers and   telecoms, it doesn’t exactly inspire  confidence in their EV ambitions. What really makes Natron worth discussing,  though, is its push for full-scale commercial   production. The company is building its own  sodium-ion gigafactory in Edgecombe County,   North Carolina, with a planned  production capacity of 24 GWh.
• 08:00 - 08:30 And this isn’t Natron’s first rodeo. Last  year, it opened a smaller sodium battery   factory in Holland, Michigan—currently  the only one of its kind in the U.S.,   at least until the larger facility comes  online. At full capacity, the Holland   plant is expected to produce 600 megawatts of  sodium-ion batteries annually. It’s unclear   how much it’s producing right now, but Natron  says battery shipments will begin this June. Though SIBs are finally coming into their  own, researchers haven’t stopped pushing the   envelope. Over in the U.S., scientists from  the Dincă Lab have developed a sodium-ion   battery using a new organic cathode made  from, I'm not even going to try to say
• 08:30 - 09:00 bis-tetraaminobenzoquinone, because it would short  circuit my brain, I’m just going to call it TAQ. So, what’s an organic cathode, and what does it  do for a battery? Here, “organic” just means that   this cathode is made from readily available,  non-metallic elements — stuff like carbon,   hydrogen, oxygen, and nitrogen. Lithium-ion  battery anodes are often made from similar   materials (usually graphite), but making the  cathode organic as well is a big deal. Normally,   cathodes rely on metals that are scarce  and difficult to mine, like cobalt. A
• 09:00 - 09:30 fully organic battery—where both the anode and  cathode are metal-free—could be a game-changer. So why aren’t all batteries using organic  cathodes already? The problem is that they tend to   dissolve into the electrolyte, degrading both the  electrolyte and the cathode. But according to the   Dincă Group, TAQ is “completely insoluble,” highly  conductive, and boasts a high energy density. In   fact, it could rival traditional cobalt-based  cathodes at roughly *one-third* the cost. TAQ was originally developed for lithium-ion  batteries, but the results sparked a new idea:
• 09:30 - 10:00 What if they applied it to sodium-ion batteries?  Since one of sodium’s biggest drawbacks is its   lower energy density, why not address that  weakness while keeping all the cost and   sustainability benefits? Adapting the cathode  for sodium batteries took a year of refinement,   as the researchers had to tweak design principles  that didn’t translate easily from lithium-ion   technology. But the results surprised them. In the words of lead author Tianyang Chen: > “The binder we chose, carbon nanotubes,  facilitates the mixing of TAQ crystallites   and carbon black particles, leading  to a homogeneous electrode. The carbon
• 10:00 - 10:30 nanotubes closely wrap around TAQ  crystallites and interconnect them.   Both of these factors promote electron transport  within the electrode bulk, enabling an almost 100%   active material utilization, which leads  to almost theoretical maximum capacity.” Now, unlike the other sodium batteries we’ve  discussed, this breakthrough is still in the   lab. There’s no telling when—or *if*—it will  be commercialized, pass third-party tests,   or overcome all the usual hurdles. But  it’s still an exciting development for
• 10:30 - 11:00 both lithium and sodium batteries. And for  what it’s worth, the Dincă Group’s initial   research was funded by Lamborghini. So  if this tech does make it to market,   a luxury automaker is already in  line, ready to capitalize on it. While the future looks bright for SIBs,   beware—just because it glitters  doesn’t mean it’s… salt. In November 2023, Swedish manufacturer  Northvolt unveiled its own sodium battery,   boasting a respectable 160 Wh/kg energy density.  Respectable, but not exactly rock salt solid.
• 11:00 - 11:30 The company had already made waves with  its nickel-manganese-cobalt (NMC) formula,   but like many others, it aimed to  expand. After launching its first   gigafactory in Skellefteå, Sweden, and setting  up additional facilities in Sweden, Poland,   and Germany, Northvolt set its sights on North  America, planning a battery factory in Montreal. But by the following November, Northvolt  had filed for Chapter 11 bankruptcy.   Since this is the restructuring type of  bankruptcy, it’s not as dire as it sounds.   Northvolt says its Swedish operations will  continue as usual, and its German and North   American subsidiaries—funded  separately—aren’t affected.
• 11:30 - 12:00 I’m not an international corporate  financial law channel, so I won’t   pretend to know all the implications. Chapter  11 is complicated—or so I’m told. On one hand,   Northvolt claims this “voluntary  reorganization” will give them access   to $145 million in cash collateral and $100  million in debtor-in-possession financing.   On the other hand, bankruptcy—no matter the  type—doesn’t exactly inspire confidence. So,   is this just financial finessing or a sign  of deeper trouble? I guess we’ll find out.
• 12:00 - 12:30 There are still some lingering issues with  sodium batteries. Despite what CATL, BYD,   and Natron are saying, I remain skeptical about  their role in EVs. The biggest hurdle? Energy   density. Sodium-ion batteries simply don’t  pack as much power per pound as lithium does.   And while they use cheaper materials,  their lower energy density means the   cost per unit of stored energy actually  ends up higher. The savings from cheaper   components might eventually balance  this out—but for now, it’s complicated. There’s also an economic twist. Sodium batteries  gained traction during the lithium shortage,
• 12:30 - 13:00 but now? Lithium prices have plummeted—down 70%  in the past three years due to oversupply. That   price drop has weakened the financial  case for sodium, at least for now. In a February 2025 Science article, battery  chemist Dan Steingart (Columbia University)   pointed out that sodium-ion manufacturers are  still too small to benefit from economies of   scale. And a January 2025 Stanford  study examining SIBs’ path to market   success noted that when—or if—they’ll become  cost-competitive is still highly uncertain.
• 13:00 - 13:30 And, of course, lithium still has an  iron(-phosphate) grip on multiple industries.   Even with SIBs’ potential “drag-n-drop”  compatibility, shifting manufacturing and   consumer demand will take time. This creates a  catch-22: sodium batteries will only get cheaper   when they’re widely produced, but they might never  hit that scale until they’re already cheaper. So, where does that leave SIBs? Honestly,  in a pretty exciting spot. Too often,   when covering new battery tech, I have to  pump the brakes with the usual disclaimers:
• 13:30 - 14:00 “It’s still in research,” “It’s years away  from commercialization,” etc. But sodium-ion   batteries? They’re already rolling out,  backed by some of the biggest battery   makers on the planet. This might be one  of the few times a “salty” market outlook   is actually a good thing. That alone puts  them high on the Technological Readiness   Level—arguably a 9 for BESS applications,  and a few steps behind that for others. Yes, SIBs still have hurdles. But compared  to other emerging battery technologies,
• 14:00 - 14:30 these challenges seem much more  manageable. And if they pull it off,   sodium-ion might just be the  “seasoning” our energy grid needs. But what do you think? Do you think sodium has  a shot at catching on? Jump into the comments   and let me know and be sure to listen to my  follow up podcast Still TBD where we’ll keep   this conversation going. Thanks as always to my  patrons for your continued support and helping   to keep the channel going. Keep your mind open,  stay curious, and I’ll see you in the next one.