| 학회 |
한국고분자학회 |
| 학술대회 |
2017년 봄 (04/05 ~ 04/07, 대전컨벤션센터) |
| 권호 |
42권 1호 |
| 발표분야 |
기능성 고분자 |
| 제목 |
Crosslinked polymeric binder using boronic acid polymer for stable Si anode in Li ion battery |
| 초록 |
Si has received attention as active material in anode due to its high theoretical charge capacity. However the Si anode has big challenge result from the large volume expansion (＞300%) during the lithiation. This causes isolated Si and rapidly fading the capacity of electrode. To alleviate this ephemeral ability, we introduce boronic acid polymeric cross-linker for stable binding of Si. Boronic acids of crosslinker form stable chemical crosslink with vicinal hydroxyl groups of binder. And we use high molecular weight binder of PAA-PVA random copolymer due to their high viscosity and abundant functional group. Acrylic acid group have good adhesion with Cu foil and Si particle. And alcohol group form in situ chemical crosslink with boronic acid group in concentrated condition. By using elastic and entangled polymer, cross-linked binder efficiently grasp expanded Si. This crosslinking of boronic acid and PAA-PVA will maintain electrode and improve lifetime and capacity of Li ion battery. |
| 저자 |
김지민, 복태수, M. T. Jeena, 박수진, 유자형
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| 소속 |
울산과학기술원 |
| 키워드 |
binder; polymer; crosslinker; si anode; silicon anode
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| E-Mail |
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