Open AccessAir‐Stable Copper‐Based P2‐Na 7/9 Cu 2/9 Fe 1/9 Mn 2/3 O 2 as a New Positive Electrode Material for Sodium‐Ion Batteries
Author(s) -
Li Yunming,
Yang Zhenzhong,
Xu Shuyin,
Mu Linqin,
Gu Lin,
Hu YongSheng,
Li Hong,
Chen Liquan
Publication year - 2015
Publication title -
advanced science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.388
H-Index - 100
ISSN - 2198-3844
DOI - 10.1002/advs.201500031
Subject(s) - copper , manganese , materials science , analytical chemistry (journal) , mineralogy , chemistry , metallurgy , environmental chemistry
An air‐stable copper‐based P2‐Na 7/9 Cu 2/9 Fe 1/9 Mn 2/3 O 2 is designed and synthesized by a simple solid‐state method and investigated as a positive electrode material for sodium‐ion batteries. The attractive long cycling stability is demonstrated by the capacity retention of 85% after 150 cycles at 1 C rate without phase transformation. The reversible Cu 2+ /Cu 3+ redox couple in P2 phase oxides is proved for the first time.