Structure and electrochemical properties of layered sodium manganese oxide NaxMnO2

被引：7
|
作者：
Lin, Zhiping [1 ]
Zhao, Siliang [2 ]
Wu, Fugen [2 ]
机构：
[1] Guangdong Univ Technol, Sch Phys & Optoelect Engn, Guangzhou 510090, Guangdong, Peoples R China
[2] Guangdong Univ Technol, Sch Mat & Energy, Guangzhou 510090, Guangdong, Peoples R China
来源：
MATERIALS RESEARCH EXPRESS | 2019年 / 6卷 / 09期
关键词：
Na-ion batteries; Na0.808MnO2-delta; electrochemical properties; defect structure; INITIO MOLECULAR-DYNAMICS; CATHODE MATERIAL; PERFORMANCE; DEINTERCALATION; TRANSITION;
D O I：
10.1088/2053-1591/ab2e4e
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Layered Na0.808MnO2-delta were prepared by solid state method under oxygen environment. The Rietveld refinement result showed that lattice parameters are a = 2.8653 angstrom, c = 11.0987 angstrom with space group P63/mmc. There were some vacancies in Na site and O site, and the Na vacancy is more easily formed in the Nal(2b) site by first-principles calculation. The electrochemical measurement shows reversible de/intercalation of about 0.4Na ion so as to deliver a discharge capacity of 103 mAhg(-1) in the potential range of 2.0-3.6 V. By comparison of theory and experiment, some Na vacancies is favor to improving the cycle performance of sodium ion battery.
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页数：6
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