| 학회 |
한국공업화학회 |
| 학술대회 |
2021년 봄 (05/12 ~ 05/14, 부산 벡스코(BEXCO)) |
| 권호 |
25권 1호 |
| 발표분야 |
포스터-전기화학 |
| 제목 |
Replacing conventional battery electrolyte additives with dioxolone derivatives for high-energy-density lithium-ion batteries |
| 초록 |
Solid electrolyte interphases (SEI) generated using electrolyte additives are key for anode-electrolyte interactions and for enhancing the lithium-ion battery (LIB) lifespan. Classical SEI additives such as VC and FEC have limited potential for simultaneously achieving a long lifespan and fast chargeability in LIBs. Here we report a next-generation synthetic additive approach that allows to form a stable electrode-electrolyte interface architecture from fluorinated and silylated electrolyte additives; it endures volume expansion of Si-embedded anodes and provides ion channels for facile Li-ion transport while protecting the Ni-rich cathodes. The retrosynthetically designed SEI-forming additives provide spatial flexibility to the VC-derived solid electrolyte interphase via polymeric propagation with the vinyl group of VC. The interface architecture from the synthesized additives enables high-energy-density LIBs with 81.5% capacity retention after 400 cycles and fast charging capability. |
| 저자 |
박세원1, 정서영1, 이태경2, 박민우3, 임형용1, 성재경4, 조재필1, 곽상규1, 홍성유1, 최남순1
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| 소속 |
1울산과학기술원, 2한국에너지기술(연), 3SK이노베이션, 4MIT |
| 키워드 |
리튬이온전지; 전해액; 첨가제; 실리콘음극; Ni-rich 양극
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| E-Mail |
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