%A Mu Lin-Qin (穆林沁), Hu Yong-Sheng (胡勇胜), Chen Li-Quan (陈立泉) %T New layered metal oxides as positive electrode materials for room-temperature sodium-ion batteries %0 Journal Article %D 2015 %J Chin. Phys. B %R 10.1088/1674-1056/24/3/038202 %P 38202-038202 %V 24 %N 3 %U {https://cpb.iphy.ac.cn/CN/abstract/article_117290.shtml} %8 %X

In order to achieve better Na storage performance, most layered oxide positive electrode materials contain toxic and expensive transition metals Ni and/or Co, which are also widely used for lithium-ion batteries. Here we report a new quaternary layered oxide consisting of Cu, Fe, Mn, and Ti transition metals with O3-type oxygen stacking as a positive electrode for room-temperature sodium-ion batteries. The material can be simply prepared by a high-temperature solidstate reaction route and delivers a reversible capacity of 94 mAh/g with an average storage voltage of 3.2 V. This paves the way for cheaper and non-toxic batteries with high Na storage performance.