title: Synthesis-microstructure-performance relationship of layered transition metal oxides as cathode for rechargeable sodium batteries prepared by high-temperature calcination.
abstract: Research on sodium batteries has made a comeback because of concern regarding the limited resources and cost of lithium for Li-ion batteries. From the standpoint of electrochemistry and economics, Mn- or Fe-based layered transition metal oxides should be the most suitable cathode candidates for affordable sodium batteries. Herein, this paper reports a novel cathode material, layered Na1+x(Fey/2Niy/2Mn1-y)1-xO2 (x = 0.1-0.5), synthesized through a facile coprecipitation process combined with subsequent calcination. For such cathode material calcined at 800 °C for 20 h, the Na/Na1+x(Fey/2Niy/2Mn1-y)1-xO2 (x = 0.4) electrode exhibited a good capacity of 99.1 mAh g(-1) (cycled at 1.5-4.0 V) and capacity retention over 87% after 50 cycles. Optimization of this material would make layered transition metal oxides a strong candidate for the Na-ion battery cathode.
authors.affiliation: Beijing Key Laboratory of Environmental Science and Engineering, School of Chemical Engineering and Environment, Beijing Institute of Technology , Beijing, 100081, China.
authors.forename: Man
authors.initials: M
authors.lastname: Xie
authors.forename: Rui
authors.initials: R
authors.lastname: Luo
authors.forename: Jun
authors.initials: J
authors.lastname: Lu
authors.forename: Renjie
authors.initials: R
authors.lastname: Chen
authors.forename: Feng
authors.initials: F
authors.lastname: Wu
authors.forename: Xiaoming
authors.initials: X
authors.lastname: Wang
authors.forename: Chun
authors.initials: C
authors.lastname: Zhan
authors.forename: Huiming
authors.initials: H
authors.lastname: Wu
authors.forename: Hassan M
authors.initials: HM
authors.lastname: Albishri
authors.forename: Abdullah S
authors.initials: AS
authors.lastname: Al-Bogami
authors.forename: Deia Abd
authors.initials: DA
authors.lastname: El-Hady
authors.forename: Khalil
authors.initials: K
authors.lastname: Amine
keywords: Na-ion batteries; calcination; cathode; layered structure; transition-metal oxide