| 학회 |
한국공업화학회 |
| 학술대회 |
2015년 가을 (11/04 ~ 11/06, 제주국제컨벤션센터(ICCJEJU)) |
| 권호 |
19권 2호 |
| 발표분야 |
고분자_포스터 |
| 제목 |
Improvement of low-temperature performance by adopting poly dimethyl siloxane-g-poly acrylate and lithium-modified silica nanosalt as electrolyte additives in lithium-ion batteries. |
| 초록 |
In this work, poly[dimethylsiloxane-co-(siloxane-g-acrylate)] (PDMS-A) and lithium-modified silica nanosalt (Li202) are used together as low-temperature electrolyte additives in lithium-ion batteries (LIBs), taking advantage of the electrochemical and interfacial stabilities due to their surface functional groups. Using these additives together improves the electrochemical stability and ionic conductivity of liquid electrolyte solution to over 5.5 V and 4´10-4Scm-1 at -20oC, respectively. The room-temperature electrochemical performance of a conventional LIB(LiCoO2/graphite)is improved by the addition (e.g., initial discharge capacity of 95.9 mAhg-1 obtained after charging at1.0C-rate and consequent discharging at5.0C-rate). The low-temperature performance is also enhanced, achieving a capacity retention ratio of 63.4% after 50cycles at -20oC, compared to 38.7% without the additives. |
| 저자 |
고장면1, 남현국2, 백용구3, 박종욱2, 김광만3, LATIFATU MOHAMMED4, 이해수5, 원정하1, LOUISHAMENU1
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| 소속 |
1Hanbat National Univ., 2Alphachem Co., 3Ltd., 4Catholic Univ., 5ETRI |
| 키워드 |
lowtemperature; LIB; PDMS; electrolyte
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| E-Mail |
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