| 학회 |
한국공업화학회 |
| 학술대회 |
2020년 가을 (10/28 ~ 10/30, 광주 김대중컨벤션센터(Kimdaejung Convention Center)) |
| 권호 |
24권 1호 |
| 발표분야 |
포스터-환경·에너지 |
| 제목 |
Improved electrochemical stability of the graphite anode by introducing semi-ionic C-F bond |
| 초록 |
A lithium fluoride (LiF), formed with lithium ion and fluorine ion, is one of the SEI components and thermally and chemically stable for the Lithium ion battery (LIB). In this study, the two types of C-F bonds presented as (SI) and covalent (CV) types were introduced on the graphite surface to investigate which one has main factor to form the LiF after charging step and to has more cycle stability. Disassembled anode surface after charge-discharge cycles was investigated by X-ray photoelectron spectroscopy of F1s deconvolution to confirm the LiF content. The graphite with semi-ionic C-F bonds (GSI) has 29% fluorine on the surface (pristine: 5%, graphite with CV C-F bonds (GCV): 4%) and the most fluorine on the graphite surface is formed as LiF. To evaluate the cycle stability, assembled coin-cell was charge-discharge steps for 100 cycle at 1 C-rate. The retention between first and 100th discharge capacity of GSI is 98.9% (pristine: 89.8%, GCF: 91.7%). |
| 저자 |
김경훈1, 안동해1, 노의영1, 임지선2, 이영석1
|
| 소속 |
1충남대, 2한국화학(연) |
| 키워드 |
Semi-ionin C-F bond; Lithium ion battery; Cycle stability; Lithium fluoride
|
| E-Mail |
|
