Bimetallic phosphides embedded in hierarchical Pdoped carbon for sodium ion battery and hydrogen evolution reaction applications  

磷掺杂碳微球封装双金属磷化物在钠离子电池和电催化析氢中的应用（英文）

作　　者：Linjun Huang Xinxin Cao Anqiang Pan Jing Chen Xiangzhong Kong Yongqiang Yang Shuquan Liang Guozhong Cao 黄麟竣;曹鑫鑫;潘安强;陈婧;孔祥忠;杨永强;梁叔全;曹国忠(School of Material Science and Engineering,Central South University,Changsha 410083,China;Department of Materials Science&Engineering,University of Washington,Seattle,WA 98195,USA)

机构地区：[1]School of Material Science and Engineering,Central South University,Changsha 410083,China [2]Department of Materials Science&Engineering,University of Washington,Seattle,WA 98195,USA

出　　处：《Science China Materials》2019年第12期1857-1867,共11页中国科学（材料科学（英文版）

基　　金：supported by the National Natural Science Foundation of China (51872334, 51874362 and 51572299);the Innovation-Driven Project of Central South University (2017CX001 and 2018CX004);the Natural Science Foundation of Hunan Province,China (2018JJ1036)

摘　　要：Transition metal phosphides have been explored as promising active materials for sodium-ion batteries(SIBs)and hydrogen evolution reaction(HER) applications owing to their unique physical and chemical characteristics. However,they suffer from the drawbacks such as severe agglomeration,and sluggish reaction kinetics. Herein, bimetallic phosphides(Ni2 P/Zn P4) embedded in P-doped carbon hierarchical microspheres are demonstrated with robust structural integrity,fast charge transfer, and abundant active sites. As expected,the optimally structured Ni2 P/Zn P4 composite exhibits good electrochemical performance as an anode material in SIBs,including high specific capacity, good cycling stability and rate capability. Meanwhile, the Ni2 P/Zn P4 composite also exhibits excellent electrocatalytic performance for HER with a small overpotential of 62 m V, a Tafel slope of 53 m V dec^-1, as well as excellent stability.过渡金属磷化物由于其独特的物理化学特性,在钠离子电池和电催化析氢反应领域被广泛研究.然而,过渡金属磷化物存在严重团聚和动力学迟缓等问题.本研究将双金属磷化物(Ni2P/Zn P4)嵌入到P掺杂的碳微球中,得到的纳米材料具有结构稳定、电荷转移快和活性位点丰富等优势.结果表明,结构优化的Ni2P/Zn P4复合材料作为钠离子电池负极材料具有良好的电化学性能,包括高比容量、循环稳定和倍率性能佳等.同时, Ni2P/Zn P4复合材料也表现出良好的电催化析氢性能,其过电势为62 mV, Tafel斜率为53 m V dec^-1,且稳定性良好.

关 键 词：metal organic frameworks PHOSPHATING bimetalliccomposite sodium-ion battery hydrogen evolution reaction 

分 类 号：O64[理学—物理化学]