中国物理B ›› 2014, Vol. 23 ›› Issue (11): 118202-118202.doi: 10.1088/1674-1056/23/11/118202

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Novel copper redox-based cathode materials for room-temperature sodium-ion batteries

徐淑银, 吴晓燕, 李云明, 胡勇胜, 陈立泉   

  1. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • 收稿日期:2014-09-22 修回日期:2014-09-29 出版日期:2014-11-15 发布日期:2014-11-15

Novel copper redox-based cathode materials for room-temperature sodium-ion batteries

Xu Shu-Yin (徐淑银), Wu Xiao-Yan (吴晓燕), Li Yun-Ming (李云明), Hu Yong-Sheng (胡勇胜), Chen Li-Quan (陈立泉)   

  1. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2014-09-22 Revised:2014-09-29 Online:2014-11-15 Published:2014-11-15
  • Contact: Hu Yong-Sheng E-mail:yshu@aphy.iphy.ac.cn

摘要:

Layered oxides of P2-type Na0.68Cu0.34Mn0.66O2, P2-type Na0.68Cu0.34Mn0.50Ti0.16O2, and O'3-type NaCu0.67Sb0.33O2 were synthesized and evaluated as cathode materials for room-temperature sodium-ion batteries. The first two materials can deliver a capacity of around 70 mAh/g. The Cu2+ is oxidized to Cu3+ during charging, and the Cu3+ goes back to Cu2+ upon discharging. This is the first demonstration of the highly reversible change of the redox couple of Cu2+/Cu3+ with high storage potential in secondary batteries.

关键词: energy storage, sodium-ion battery, cathode, copper redox

Abstract:

Layered oxides of P2-type Na0.68Cu0.34Mn0.66O2, P2-type Na0.68Cu0.34Mn0.50Ti0.16O2, and O'3-type NaCu0.67Sb0.33O2 were synthesized and evaluated as cathode materials for room-temperature sodium-ion batteries. The first two materials can deliver a capacity of around 70 mAh/g. The Cu2+ is oxidized to Cu3+ during charging, and the Cu3+ goes back to Cu2+ upon discharging. This is the first demonstration of the highly reversible change of the redox couple of Cu2+/Cu3+ with high storage potential in secondary batteries.

Key words: energy storage, sodium-ion battery, cathode, copper redox

中图分类号:  (Nanostructured materials in electrochemistry)

  • 82.45.Yz
82.47.Aa (Lithium-ion batteries) 82.47.Cb (Lead-acid, nickel-metal hydride and other batteries) 84.60.-h (Direct energy conversion and storage)