Nanostructural CoSnC anode prepared by CoSnO3 with improved cyclability for high-performance Li-ion batteries |
| |
Authors: | Wangjun Cui Fei Wang Jie Wang Congxiao Wang Yongyao Xia |
| |
Affiliation: | Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Institute of New Energy, Fudan University, Shanghai 200433, People's Republic of China |
| |
Abstract: | Stannate, CoSnO3, which mixes the elements Co and Sn evenly at the atomic level, was used as precursor to prepare CoSnC by a modified carbothermal reduction method. The synthesis process was characterized by differential thermal analysis (DTA) and X-ray diffraction (XRD). The particle feature was evaluated by transmission electron microscopy (TEM). The results indicated the as-prepared composite has a well-coated carbon layer that effectively prevents the encapsulated, low melting point alloy from out-flowing in a high-temperature treatment process. In addition, this structure, CoSnx grains surrounded by carbon, prevents aggregation and pulverization of nanosized, tin-based alloy particles during charge/discharge cycling and improves the cycling stability of the alloy. The synthesized CoSnC integrates the merits of intermetallic compounds and nanosized anode materials and delivers a reversible capacity of 450 mA h g−1 with a capacity retention of 72% after 50 cycles. |
| |
Keywords: | Intermetallic compounds Carbothermal reduction Hydrophobic powders Lithium-ion battery |
本文献已被 ScienceDirect 等数据库收录! |
|