It’s little wonder that solid state is most quoted by performance car manufacturers Bentley sees the technology as its primary way to make electrification work for them. They are also expected to charge faster.īetter efficiency and energy density means solid-state batteries don’t require the cooling and control components that lithium-ion batteries do either, and that means a smaller overall footprint along with more chassis freedom and less weight. That means powerful and longer range electric cars or more compact and lighter EVs. That means more powerful batteries without extra space, or more compact battery packs without compromising on power. Thanks to the solid electrolyte having a smaller footprint, solid-state batteries promise some two to ten times the energy density of lithium-ion batteries of the same size. What makes solid-state batteries the next big thing? As such, work is being done to allow them to power larger devices and be recharged. Arguelles, Tetsuroh Shirasawa, Shusuke Kasamatsu, Koji Shimizu, Kazunori Nishio, Yuki Watanabe, Yusuke Kubota, Ryota Shimizu, Satoshi Watanabe and Taro Hitosugi, 6 January 2022, ACS Applied Materials & Interfaces.Solid-state batteries have been around for a while, but are only used for small electronic devices like RFID tags and pacemakers and in their current state are non-rechargeable.
Reference: “Drastic reduction of the solid electrolyte–electrode interface resistance via annealing in battery form” by Shigeru Kobayashi, Elvis F.
We hope that the elucidation of these interfacial microscopic processes would help widen the application potential of all-solid-state batteries,” concludes Prof. “Our study shows that protons in the LiCoO 2 structure play an important role in the recovery process. Amazingly, this reduced the resistance down to 10.3 Ω cm 2, comparable to that of the unexposed battery!īy performing numerical simulations and cutting-edge measurements, the team then revealed that the reduction could be attributed to the spontaneous removal of protons from within the LiCoO 2 structure during annealing. The team next performed a process called “annealing”, in which the sample underwent a heat treatment at 150 ☌ for an hour in battery form i.e.
“Only H 2O vapor strongly degrades the Li 3PO 4 – LiCoO 2 interface and increases its resistance drastically to a value more than 10 times higher than that of the unexposed interface,” says Prof. To their surprise, they found that exposure to N 2, O 2, CO 2, and H 2, did not degrade the battery performance compared to a non-exposed battery. Before completing the fabrication of a battery, the team exposed the LiCoO 2 surface to air, nitrogen (N 2), oxygen (O 2), carbon dioxide (CO 2), hydrogen (H 2), and water vapor (H 2O) for 30 minutes. To start off, the team prepared thin film batteries comprising a lithium negative electrode, an LiCoO 2 positive electrode, and an Li 3PO 4 solid electrolyte. The study was the result of a joint research by Tokyo Tech, National Institute of Advanced Industrial Science and Technology(AIST), and Yamagata University. By establishing a strategy for restoring the low interface resistance as well as unraveling the mechanism underlying this reduction, the team has provided valuable insights into the manufacturing of high-performance all-solid-state batteries. Taro Hitosugi from Tokyo Institute of Technology (Tokyo Tech), Japan, and Shigeru Kobayashi, a doctoral student at Tokyo Tech, may have finally solved this problem. Now, in a recent study published in ACS Applied Materials & Interfaces, a research team led by Prof. All-solid-state batteries, which use a solid electrolyte instead of a liquid electrolyte found in traditional batteries, not only meet these standards but are comparatively safer and more convenient as they have the possibility to charge in a short time.Ĭredit: Shigeru Kobayashi and Taro Hitosugi of Tokyo Institute of Technology They also explore the underlying reduction mechanism, paving the way for a more fundamental understanding of the workings of all-solid-state lithium batteries.Īll-solid-state lithium batteries have become the new craze in materials science and engineering as conventional lithium-ion batteries can no longer meet the standards for advanced technologies, such as electric vehicles, which demand high energy densities, fast charging, and long cycle lives. Scientists Reduce All-Solid-State Battery Resistance by HeatingĪll-solid-state batteries are now one step closer to becoming the powerhouse of next-generation electronics as researchers from Tokyo Tech, AIST, and Yamagata University introduce a strategy to restore their low electrical resistance.
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