In situ synthesis of expanded graphite embedded with amorphous carbon-coated aluminum particles as anode materials for lithium-ion batteries

Nanotechnology Reviews

article

Xin Zhao¹  Tingkai Zhao²  Xiarong Peng²  Lei Yang²  Yuan Shu²  Tao Jiang²  Ishaq Ahmad³ 

[1] Queen Mary University of London Engineering School, Northwestern Polytechnical University;NPU-NCP Joint International Research Center on Advanced Nanomaterials & Defects Engineering, Shaanxi Engineering Laboratory of Graphene New Carbon Materials and Applications, School of Materials Science and Engineering, Northwestern Polytechnical University;NPU-NCP Joint International Research Center on Advanced Nanomaterials and Defects Engineering, Experimental Physics Department, National Center for Physics

关键词: amorphous carbon coated aluminum particles;    electrochemical property;    expanded graphite;   

DOI  :  10.1515/ntrev-2020-0033

学科分类：社会科学、人文和艺术（综合）

来源: De Gruyter

【 摘 要 】

Expanded graphite embedded with amorphous carbon-coated aluminum particle (C@Al–EG) composites were in situ synthesized by chemical vapour deposition (CVD) and ball-milling methods using EG and metallic aluminum as raw materials. Using the characterization and analysis of scanning electron microscopy, X-ray diffraction, alternating current impedance and first charge–discharge curves, the different Al contents in C@Al–EG composites were studied, and the experimental results show that the best performing content for Al was 30 wt%. The C@Al–EG composites exhibited high capacity, excellent cycle stability and rate performance as anode materials for lithium-ion batteries. At a current density of 100 mA h/g, the first reversible capacity of C@Al–EG composites was 401 mA h/g, and the decreasing speed of capacity was slow, with the specific capacity remaining at 381 mA h/g after 50 cycles. The retention rate was up to 95%.

【 授权许可】

CC BY