| 학회 | 한국화학공학회 |
| 학술대회 | 2020년 가을 (10/14 ~ 10/16, e-컨퍼런스) |
| 권호 | 26권 1호, p.526 |
| 발표분야 | 에너지 환경 |
| 제목 | A Pyrene-Polyacrylic Acid-Polyrotaxane Supramolecular Binder Network for High Performance Silicon Negative Electrodes |
| 초록 | As high energy density lithium‐ion batteries are required, the contents of silicon in anode are increasing. However, the weight portion of silicon monoxide (SiOx, x ≈ 1) is only less than 10 wt% because of unstable cycle life. Polymeric binders that can support in maintaining the electrode integrity and interfacial stability of SiOx electrodes are desired to carry out higher contents of SiOx. Here, we describe that a pyrene–poly(acrylic acid) (PAA)–polyrotaxane (PR) supramolecular network as a polymeric binder for SiOx. The noncovalent modification of a carbon-coated SiOx is accomplished by using a hydroxylated pyrene derivative via the π–π stacking interaction, which enables strong hydrogen bonding interactions between carboxylic acid in the PR–PAA network and hydroxyl moiety. Furthermore, the ring sliding of PR endows superior elasticity to the entire binder network, effectively distributing the stress during cycling and alleviating the electrode swelling. Based on these sequential supramolecular interactions of the hierarchical binder network, highly robust cycling performance of SiOx electrode was achieved at commercial levels. |
| 저자 | 김재민, 조윤식, 최성훈, 박기호, 최장욱 |
| 소속 | 서울대 |
| 키워드 | 에너지 |
| 원문파일 | 초록 보기 |
