High Performance Si Negative Electrode Composed of Silicate Inorganic Binder
ケイ酸塩系無機バインダを用いた高性能Si負極
- Delivery
- Available on the other site
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- Paper/Info type
- Honda R&D Technical Review
Vol.33 No.1
- Pages
- 78-85(Total 8 p)
- Date of publication
- Mar 2021
- Publisher
- Others, Unknown
- Language
- Japanese
Detailed Information
Category(J) | 論文 Translation |
---|---|
Category(E) | Technical Papers and Explanation |
Author(J) | 1) 髙橋 牧子, 2) 木下 智博, 3) 田名網 潔, 4) 青柳 真太郎, 5) 向井 孝志, 6) 池内 勇太, 7) 坂本 太地, 8) 山下 直人 |
Author(E) | 1) Makiko TAKAHASHI, 2) Tomohiro KINOSHITA, 3) Kiyoshi TANAAMI, 4) Shintaro AOYAGI, 5) Takashi MUKAI, 6) Yuta IKEUCHI, 7) Taichi SAKAMOTO, 8) Naoto YAMASHITA |
Affiliation(J) | 1) 本田技術研究所, 2) 本田技術研究所, 3) 本田技術研究所, 4) 本田技術研究所, 5) ATTACCATO, 6) ATTACCATO, 7) ATTACCATO, 8) ATTACCATO |
Affiliation(E) | 1) Honda R&D , 2) Honda R&D , 3) Honda R&D , 4) Honda R&D , 5) ATTACCATO, 6) ATTACCATO, 7) ATTACCATO, 8) ATTACCATO |
Abstract(J) | Si負極の充放電に伴う体積膨張を抑制する目的で,ケイ酸塩系無機バインダを用いる検討をおこなった. 導電助剤により電極の密度を下げ,電極内部まで無機バインダが浸み込んだSi負極を用いることで,充放電に伴う電極膨張量を制御でき,集電体からの剥離と活物質層内の導電パス切断を抑えられたことにより,大きな可逆充放電容量を持つ高性能なSi負極が実現できた. その要因を解明するために,XPS解析とSTEM-EDX解析をおこなったところ,無機バインダコート電極では,シロキサン結合ネットワークが形成され強固な結合が得られていること,Siと無機バインダが融合している界面相が形成されていることがわかった. Translation |
Abstract(E) | Use of a silicate inorganic binder was investigated with the goal of suppressing volume expansion of Si negative electrodes associated with charge-discharge. Use of a Si negative electrode with the electrode density lowered by conductive carbon and with inorganic binder permeated to the electrode interior enabled control of the amount of electrode expansion associated with charge-discharge and suppression of delamination from the current collector and conductive path breakdown within the active material layer. This realized a high-performance Si negative electrode with a large reversible charge-discharge capacity. XPS analysis and STEM-EDX analysis were performed to elucidate these factors. The results showed that in electrodes coated with an inorganic binder, a network of siloxane bonds formed and strong bonds were obtained, and an interface phase in which the Si and inorganic binder are fused also formed. |