| 학회 |
한국공업화학회 |
| 학술대회 |
2015년 가을 (11/04 ~ 11/06, 제주국제컨벤션센터(ICCJEJU)) |
| 권호 |
19권 2호 |
| 발표분야 |
고분자_포스터 |
| 제목 |
Conformal Coating Strategy Comprising N-doped Carbon and Conventional Graphene for Achieving Ultra-high Power and Cyclability of LiFePO4 |
| 초록 |
Surface carbon coating to improve the inherent poor electrical conductivity of lithium iron phosphate (LiFePO4, LFP) has been considered as most efficient strategy. Here, we also report one of the conventional methods for LFP, but exhibiting a specific capacity beyond the theoretical value, ultra-high rate performance, and excellent long-term cyclability: the specific capacity is 171.9 mAh/g (70 m-thick electrode with ~10 mg/cm2 loading mass) at 0.1 C (17 mA/g), and retains 143.7 mAh/g at 10 C (1.7 A/g) and 95.8 % of initial capacity at 10 C after 1000 cycles. It was found that the interior conformal N-C coating enhances the intrinsic conductivity of LFP nanorods (LFP NR) and the exterior RGO coating acts as an electrically conducting secondary network to electrically connect the entire electrode. The great electron transport mutually promoted with shorten Li diffusion length on (010) facet exposed LFP NR represents the highest specific capacity value recorded to date at 10C and ultra-long-term cyclability. This conformal carbon coating approach can be a promising strategy for the commercialization of LFP cathode in lithium ion batteries. |
| 저자 |
박종혁1, Kan Zhang1, li ping2
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| 소속 |
1연세대, 2성균관대 |
| 키워드 |
LiFePO4 cathode; Li ion diffusion; intrinsic conductivity; electrode conductivity; conformal coating strategy
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| E-Mail |
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