Synthesis and electrochemical performance of aluminum based composites

Journal of the Brazilian Chemical Society

Xue-feng Lei¹  Jun-xian Ma¹ 

[1] ,University of Electronic Science and Technology of China Zhongshan Institute Department of Chemistry & Biology,P. R. China

关键词: lithium ion battery;    anode;    aluminum based composites;    synthesis;    electrochemical performance;   

DOI  :  10.1590/S0103-50532010000200004

来源: SciELO

【 摘 要 】

Aluminum is a very attractive anode material for lithium ion batteries if the fast capacity fading and cycle performance are improved. Al/carbon composites were synthesized using polyvinyl alcohol (PVA) as carbon source to solve these problems. The samples were characterized by thermogravimetric analysis and differential scanning calorimetry (DSC-TGA), particle size analysis, X-ray diffraction (XRD), scanning electron microscope (SEM) and galvanostatic cycling. Although the initial irreversible capacities increase due to the presence of carbon, the composites exhibit improved cycle performance. The composite with high carbon content (composite B) possesses capacity retention of 58% after 15 cycles, which is much higher than that of pure aluminum (21%). Results indicate that carbon coating is a feasible method to improve the electrochemical performance of metal aluminum.

【 授权许可】

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