| 학회 |
한국고분자학회 |
| 학술대회 |
2017년 봄 (04/05 ~ 04/07, 대전컨벤션센터) |
| 권호 |
42권 1호 |
| 발표분야 |
기능성 고분자 |
| 제목 |
Significance of ferroelectric polarization in PVDF binder for high-rate Li-ion battery |
| 초록 |
We investigated the effect of the crystalline phase of the PVDF binder in the electrodes. The ferroelectric PVDF binder is developed by an appropriate thermal annealing process that allows us to apply it to various active battery electrode materials. The active electrodes containing the ferroelectric PVDF binder exhibit greatly improved capacity performance at high current rates in both half- and full-cell architectures. This promising battery performance is systematically studied by in situ galvanostatic electrochemical impedance spectroscopy (GS-EIS) and a galvanostatic intermittent titration technique (GITT) measurement. Furthermore, we demonstrate the ferroelectric contribution of PVDF binder in the battery system by using density functional theory (DFT) calculations. The resulting battery performance and DFT calculations support the finding that the polarization characteristics of binder material are a viable design strategy to enhance the battery performance. |
| 저자 |
김도형, 송우진, 주세훈, 김경태, 강석주
|
| 소속 |
울산과학기술원(UNIST) |
| 키워드 |
Li-ion battery; Polymeric binder; Ferroelectric; PVDF; High current rate
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| E-Mail |
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