期刊
NANOSCALE RESEARCH LETTERS
卷 14, 期 1, 页码 -出版社
SPRINGEROPEN
DOI: 10.1186/s11671-019-3165-x
关键词
Lithium-ion batteries; Cathode; Li2FeSiO4; Core-shell structure
资金
- National Natural Science Foundation of China
- Natural Science Foundation of Henan Province
- Innovative Research Team (in Science and Technology) in the University of Henan Province
- Nanhu Scholars Program for Young Scholars of Xinyang Normal University
The reasonable design of nanostructure is the key to solving the inherent defects and realizing a high performance of Li2FeSiO4 cathode materials. In this work, a novel heterostructure CNT@Li2FeSiO4@C has been designed and synthesized and used as a cathode material for lithium-ion battery. It is revealed that the product has a uniform core-shell structure, and the thickness of the Li2FeSiO4 layer and the outer carbon layer is about 19 nm and 2 nm, respectively. The rational design effectively accelerates the diffusion of lithium ions, improves the electric conductivity, and relieves the volume change during the charging/discharging process. With the advantages of its specific structure, CNT@Li2FeSiO4@C has successfully overcome the inherent shortcomings of Li2FeSiO4 and shown good reversible capacity and cycle properties.
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