| 학회 |
한국공업화학회 |
| 학술대회 |
2017년 봄 (05/10 ~ 05/12, 광주 김대중컨벤센센터(Kimdaejung Convention Center)) |
| 권호 |
21권 1호 |
| 발표분야 |
환경에너지 |
| 제목 |
High charge and discharge rate properties of graphite foams particle electrode for lithium ion batteries |
| 초록 |
Graphite foams (GFms) are fabricated with hydrogel template method using mesophase pitch (MP) and polyvinylalcohol-acrylic acid (PVA-AAc) solution for lithium-ion batteries (LIBs) anode materials. The GFms’ crystalline structure, porosity and electrochemical properties are analyzed by X-ray diffraction (XRD), porosimeter and BLCT battery cycler, respectively. The GFm particles has developed crystalline structure (interlayer spacing (d002) of 0.3375 nm and crystalline thickness (Lc) of 29.112 nm) and the porosity of 56.55%. The discharge capacity of fully charged GFm particles electrode indicates 345.3 mAh/g at 30C-rate, within 2 min. This has coulombic efficiency of 92% compared to the discharge capacity at 0.2C. The porous GFm particles may be an effective approach to improve the lithium diffusion rate because a number of pores, channels and slightly high interlayer spacing of the GFm particles reduce the diffusion distance and increased pathways of lithium ions. |
| 저자 |
김도영1, 김지현1, Yunhua Yu2, Xiaoping Yang2, 이영석1
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| 소속 |
1충남대, 2Beijing Univ. of Chemical Technology |
| 키워드 |
Graphite foam; Mesophase pitch; X-ray diffraction; Discharge capacity
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| E-Mail |
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