| 학회 |
한국고분자학회 |
| 학술대회 |
2015년 가을 (10/06 ~ 10/08, 대구컨벤션센터(EXCO)) |
| 권호 |
40권 2호 |
| 발표분야 |
기능성 고분자 |
| 제목 |
Initiated Chemical Vapor Deposition (iCVD) of Highly Cross-linked Polymer Films for Advanced Lithium-ion Battery Separators |
| 초록 |
We report an initiated chemical vapor deposition (iCVD) process to coat polyethylene (PE) separators in Li-ion batteries with a highly cross-linked, mechanically strong polymer, pHVDS. After the pHVDS coating, the initial porous structure of the separator is well preserved owing to the conformal vapor phase deposition. The coating thickness is delicately controlled by deposition time to the level that the pore size decreases by below 7% compared to the original dimension. The pHVDS-coated PE shows substantially improved thermal stability and electrolyte wettability. After incubation at 140 ℃ for 30 min, the pHVDS-coated PE causes only a 12% areal shrinkage (versus 90% of the pristine separator). The superior wettability results in increased electrolyte uptake and ionic conductivity, leading to significantly improved rate performance. The current approach is applicable to a wide range of porous polymeric separators that suffer from thermal shrinkage and poor electrolyte wetting. |
| 저자 |
임성갑1, 최장욱1, 송헌식2, 한성재2, 박관용1, 김병곤1, 유영민1
|
| 소속 |
1KAIST, 2LG chem |
| 키워드 |
initiated chemical vapor deposition (iCVD); Li-ion battery separator; poly hexavinyldisiloxane (pHVDS); thermal stability; electrolyte wettability
|
| E-Mail |
|
