A Hydrostable Cathode Material Based on the Layered P2@P3 Composite that Shows Redox Behavior for Copper in High-Rate and Long-Cycling Sodium-Ion Batteries

Authors

Zichao Yan, University of WollongongFollow
Liang Tang, Shanghai University
Yangyang Huang, Tongji University
Weibo Hua, Karlsruhe Institute of Technology
Yong Wang, Shanghai University
Rong Liu, University of Western Australia
Qinfen Gu, Australian Synchrotron Company
Sylvio Indris, Karlsruhe Institute of Technology
Shulei Chou, University of WollongongFollow
Yunhui Huang, Huazhong University of Science and Technology
Minghong Wu, Shanghai University
Shi Xue Dou, University of WollongongFollow

RIS ID

132635

Publication Details

Yan, Z., Tang, L., Huang, Y., Hua, W., Wang, Y., Liu, R., Gu, Q., Indris, S., Chou, S., Huang, Y., Wu, M. & Dou, S. (2019). A Hydrostable Cathode Material Based on the Layered P2@P3 Composite that Shows Redox Behavior for Copper in High-Rate and Long-Cycling Sodium-Ion Batteries. Angewandte Chemie - International Edition, 58 (5), 1412-1416.

Abstract

Low‐cost layered oxides free of Ni and Co are considered to be the most promising cathode materials for future sodium‐ion batteries. Biphasic Na_0.78Cu_0.27Zn_0.06Mn_0.67O₂ obtained via superficial atomic‐scale P3 intergrowth with P2 phase induced by Zn doping, consisting of inexpensive transition metals, is a promising cathode for sodium‐ion batteries. The P3 phase as a covering layer in this composite shows not only in excellent electrochemical performance but also its tolerance to moisture. The results indicate that partial Zn substitutes can effectively control biphase formation for improving the structural/electrochemical stability as well as the ionic diffusion coefficient. Based on in situ synchrotron X‐ray diffraction coupled with electron‐energy‐loss spectroscopy, a possible Cu^2+/3+ redox reaction mechanism has now been revealed.