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Rate-capability response of graphite anode materials in advanced energy storage systems: a structural comparison
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  • Rate-capability response of graphite anode materials in advanced energy storage systems: a structural comparison
저자명
Umer Farooq,Chil-Hoon Doh,Syed Atif Pervez,Doo-Hun Kim,Sang-Hoon Lee,Mohsin Saleem,Seong-Ju Sim,Jeong-Hee Choi
간행물명
Carbon LettersKCI
권/호정보
2016년|17권 1호(통권63호)|pp.39-44 (6 pages)
발행정보
한국탄소학회|한국
파일정보
정기간행물|ENG|
PDF텍스트(19.76MB)
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영문초록

The work presented in this report was a detailed comparative study of the electrochemical response exhibited by graphite anodes in Li-ion batteries having different physical features. A comprehensive morphological and physical characterization was carried out for these graphite samples via X-ray diffraction and scanning electron microscopy. Later, the electrochemical performance was analyzed using galvanostatic charge/discharge testing and the galvanostatic intermittent titration technique for these graphite samples as negative electrode materials in battery operation. The results demonstrated that a material having a higher crystalline order exhibits enhanced electrochemical properties when evaluated in terms of rate-capability performance. All these materials were investigated at high C-rates ranging from 0.1C up to 10C. Such improved response was attributed to the crystalline morphology providing short layers, which facilitate rapid Li+ ions diffusivity and electron transport during the course of battery operation. The values obtained for the electrical conductivity of these graphite anodes support this possible explanation.

목차

1. Introduction
2. Experimental
3. Results and Discussion
4. Conclusions
References

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