Ternary Cu2P7/CuP2/C composite: A high-performance multi-phase anode material for Li/Na-ion batteries endowed by heterointerfaces

Li, Xinwei2; Liao, Jun1; Shen, Pengfei1; Lia, Xia1; Li, Yunyong1; Li, Na1; Li, Zhenghui1; Shi, Zhicong1; Zhang, Haiyan1; Li, Wenwu1

2019-09-30

10.1016/j.jallcom.2019.06.218

JOURNAL OF ALLOYS AND COMPOUNDS   影响因子和分区

0925-8388

1873-4669

Phosphides are promising anode candidates profiting from their relatively smaller voltage hysteresis which thus are promising to be high energy efficiency and power capabilities for secondary batteries, compared with the corresponding fluorides, oxides and sulfides. Herein we for the first time synthesized ternary Cu2P7/CuP2/graphite composite by a facile ball milling method. When initiated as anodes for Li-ion batteries, the as-synthesized ternary composite provides 1415 mA h g(-1) after 100 cycles and 684 mA h g(-1) at a high current density of 10 A g(-1). When initiated as anodes for Na-ion batteries, the as-synthesized ternary composite provides 1254 mA h g(-1) after 100 cycles and 200 mA h g(-1) at a high current density of 5 A g(-1). These electrochemical performances are comparable or even surpass the P/C, CuP2/C and other transition metal phosphides reported before. The enhanced performances can be attributed to the high P concentration, layered structure and small band gap of the Cu2P7 phase and the heterointerface between these phases, which not only assists electron and Li-ion transportation and but also creates more active sites endowed by interfacial coupling and positive electrochemical synergistic effect. The multiphase design strategy can further excite more research interest in the energy-storage field. (C) 2019 Published by Elsevier B.V.

Ternary composite Cu2P7/CuP2/C Phase boundary Anode Lithium-ion batteries Sodium-ion batteries

SCI ; EI

英语

第一

China Postdoctoral Science Foundation[1112000139]

Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering

Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering

WOS:000476464900093

ELSEVIER SCIENCE SA

20192707138013

Anodes ; Ball milling ; Copper compounds ; Electron emission ; Energy efficiency ; Energy gap ; Fluorine compounds ; Lithium-ion batteries ; Metal ions ; Phase boundaries ; Sodium-ion batteries ; Sulfur compounds ; Transition metals

Energy Conservation:525.2 ; Metallurgy and Metallography:531 ; Metallurgy:531.1 ; Electron Tubes:714.1 ; Physical Chemistry:801.4 ; Chemical Operations:802.3

MATERIALS SCIENCE

Web of Science

1.Guangdong Univ Technol, Sch Mat & Energy, Guangzhou 510006, Guangdong, Peoples R China
2.Southern Univ Sci & Technol, Dept Mech & Energy Engn, Shenzhen 518071, Peoples R China

Li, Xinwei,Liao, Jun,Shen, Pengfei,et al. Ternary Cu2P7/CuP2/C composite: A high-performance multi-phase anode material for Li/Na-ion batteries endowed by heterointerfaces[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2019,803:804-811.

Li, Xinwei.,Liao, Jun.,Shen, Pengfei.,Lia, Xia.,Li, Yunyong.,...&Li, Wenwu.(2019).Ternary Cu2P7/CuP2/C composite: A high-performance multi-phase anode material for Li/Na-ion batteries endowed by heterointerfaces.JOURNAL OF ALLOYS AND COMPOUNDS,803,804-811.

Li, Xinwei,et al."Ternary Cu2P7/CuP2/C composite: A high-performance multi-phase anode material for Li/Na-ion batteries endowed by heterointerfaces".JOURNAL OF ALLOYS AND COMPOUNDS 803(2019):804-811.