Cellulose nanofibers for all-solid-state batteries, the University of Tokyo, etc. develop candidate materials for solid electrolytes.

https://news.yahoo.co.jp/articles/bef84f2b9f84d43a5dfa1fcd7f0439ff7ee02e5e I
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10/26 (Tue) 16:20delivery

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　US Brown University , University of Maryland, the University of Tokyo to use the cellulose nanofibers (CNF) research team, such as that the trees as a raw material, the next-generation electric vehicles candidate material for the solid electrolyte of the all-solid-state battery, which is the cornerstone of (EV) Was developed. The results were published in the English scientific journal " Nature ". "All-solid-state battery" in 30 seconds 　Cellulose is usually impermeable to ions. On the other hand, it was demonstrated that lithium ions can move at high speed in the solid materials of copper and CNF prepared by immersing CNF in a copper alkaline solution. The reason is that by binding with copper ions, the distance between the linearly connected polymerized chains of CNF is widened, and a passage through which lithium ions can pass smoothly is created. It also has a 10-100 times higher ability to carry ions than other polymer ion conductors. Furthermore, taking advantage of its characteristics as an ionic conductor, it may be used as a binder (binding material) for the positive electrode of all-solid-state batteries. In addition, it points out that it has a small environmental load and that it has high strength and flexibility compared to the ceramic materials used in many of the solid electrolytes that are being researched and developed.

Nikkan Kogyo Shimbun