期刊
CHEMISTRY OF MATERIALS
卷 28, 期 16, 页码 5935-5942出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.chemmater.6b02482
关键词
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资金
- U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering [DE-SC0005397]
An amorphous red phosphorus-based composite has been synthesized via a facile and simple one-step high-energy mechanical milling process and investigated as an anode material for lithium-ion and sodium-ion batteries. The resultant P-TiP2-C nanocomposite exhibits a high reversible capacity of 1116 mA. h g(-1), excellent cyclability, and a remarkable initial Coulombic efficiency of 86% in lithium half cells. Furthermore, it delivers an initial desodiation capacity of 755 mA h g(-1) with a high initial Coulombic efficiency of 80% and a good capacity retention of 80% after 100 cycles in sodium half cells. The greatly improved electrochemical performance is due to the unique nanoarchitecture composed of well-blended red phosphorus and crystalline TiP2 homogeneously embedded in a conductive carbon network The presence of the conductive TiP2 inclusions plays a crucial role in offering structural stability as well as high conductivity to the phosphorus-based composite particles during cycling, thereby leading to superior cycling stability and rate capability in both lithium-ion and sodium-ion batteries compared to the composite without TiP2.
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