阳极
材料科学
钠离子电池
石墨烯
法拉第效率
电池(电)
复合数
钠
化学工程
炭黑
黑磷
纳米技术
电极
复合材料
化学
冶金
光电子学
功率(物理)
物理
天然橡胶
工程类
物理化学
量子力学
作者
Yihang Liu,Liu Qing-zhou,Anyi Zhang,Jiansong Cai,Xuan Cao,Zhen Li,Paul D. Asimow,Chongwu Zhou
出处
期刊:ACS Nano
[American Chemical Society]
日期:2018-07-20
卷期号:12 (8): 8323-8329
被引量:83
标识
DOI:10.1021/acsnano.8b03615
摘要
Sodium-ion batteries offer an attractive option for grid-level energy storage due to the high natural abundance of sodium and low material cost of sodium compounds. Phosphorus (P) is a promising anode material for sodium-ion batteries, with a theoretical capacity of 2596 mAh/g. The red phosphorus (RP) form has worse electronic conductivity and lower initial Coulombic efficiency than black phosphorus (BP), but high material cost and limited production capacity have slowed the development of BP anodes. To address these challenges, we have developed a simple and scalable method to synthesize layered BP/graphene composite (BP/rGO) by pressurization at room temperature. A carbon-black-free and binder-free BP/rGO anode prepared with this method achieved specific charge capacities of 1460.1, 1401.2, 1377.6, 1339.7, 1277.8, 1123.78, and 720.8 mAh/g in a rate capability test at charge and discharge current densities of 0.1, 0.5, 1, 5, 10, 20, and 40 A/g, respectively. In a cycling performance test, after 500 deep cycles, the capacity of BP/rGO anodes stabilized at 1250 and 640 mAh/g at 1 and 40 A/g, respectively, which marks a significant performance improvement for sodium-ion battery anodes.
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