熔盐
蜂巢
材料科学
化学工程
锂(药物)
复合数
盐(化学)
金属
无机化学
化学
冶金
复合材料
物理化学
医学
工程类
内分泌学
作者
Zhiliang Liu,Shaolei Yang,Bingxue Sun,Piaoping Yang,Jie Zheng,Xingguo Li
标识
DOI:10.1002/anie.201910474
摘要
Phosphorus-rich metal phosphides have very high lithium storage capacities, but they are difficult to prepare. A low-temperature phosphorization method based on Mg reducing PCl3 in ZnCl2 molten salt at 300 °C is developed to synthesize phosphorus-rich CuP2 @C from a Cu-MOF derived Cu@C composite. Abnormal oxidation of Cu by Zn2+ in the molten salt is observed, which leads to the porous honeycomb nanostructure and homogeneously distributed ultrafine CuP2 nanocrystals. The honeycomb CuP2 @C exhibits excellent lithium storage performance with high reversible capacity (1146 mAh g-1 at 0.2 A g-1 ) and superior cycling stability (720 mAh g-1 after 600 cycles at 1.0 A g-1 ), showing the promising application of P-rich metal phosphides in lithium ion batteries.
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