New Insights into the Roles of Mg in Improving the Rate Capability and Cycling Stability of O3-NaMn0.48Ni0.2Fe0.3Mg0.02O2 for Sodium-Ion Batteries

doi:10.1021/acsami.7b18226

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	New Insights into the Roles of Mg in Improving the Rate Capability and Cycling Stability of O3-NaMn0.48Ni0.2Fe0.3Mg0.02O2 for Sodium-Ion Batteries
	Shi, R; Wang, XJ; Huang Y(黄艳); Tao Y(陶冶); Zheng LR(郑黎荣); Huang, Y; Tao, Y; Zheng, LR; Liang, HB
	2018
发表期刊	ACS APPLIED MATERIALS & INTERFACES (IF:7.504[JCR-2016],7.823[5-Year])
ISSN	1944-8244
卷号	10 期号:13 页码:10819-10827
文章类型	Article
摘要	Elements doping has been used to improve the electrochemical performances of O3-type layered transition metal oxide cathodes for sodium-ion batteries. However, their roles and the improvement mechanism have not been clearly understood. Herein, the effects of Mg substitution for Mn on the structure and electrochemical performances of NaMn0.48Ni0.2Fe0.3Mg0.02O2 have been comprehensively investigated and some new insights into the roles of Mg in improving the rate capability and cycling stability have been presented. (1) The substitution of Mg for Mn enlarges the interlayer spacing, which not only enhances Na+ diffusion and the rate capability but also alleviates the lattice strains induced by Na+ intercalation/deintercalation. (2) The substitution of Mg by Mn also shrinks TM-O bond and TMO2 slabs, which enhances the layered structure stability. (3) The Mg substitution also mitigates the structure distortion or volume change of the crystal lattices and suppresses the irreversible phase transitions. (4) The substitution of low-valence Mg2+ for Mn3+ reduces Mn3+ and minimizes Jahn-Teller effect, which also further alleviates the irreversible phase transformations and improves the layered structure stability. This study not only unveils the roles of Mg but also presents some insights into designing the cathode materials with both high rate capability and high cycling stability through the lattice structure regulation.
关键词	sodium-ion battery layered oxide cathode O3 phase Mg doping improvement mechanism
DOI	10.1021/acsami.7b18226
关键词[WOS]	CATHODE MATERIALS ; HIGH-CAPACITY ; ELECTROCHEMICAL PERFORMANCE ; O3-TYPE ; P2-NA2/3CO2/3MN1/3O2 ; INTERCALATION ; TRANSITION ; DIFFUSION ; ELECTRODE ; LAYER
收录类别	SCI ; EI
语种	英语
WOS研究方向	Science & Technology - Other Topics ; Materials Science
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS记录号	WOS:000429625400024
EI入藏号	20181504991664
引用统计	正在获取...
文献类型	期刊论文
条目标识符	https://ir.ihep.ac.cn/handle/311005/285812
专题	多学科研究中心
作者单位	中国科学院高能物理研究所
第一作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Shi, R,Wang, XJ,Huang Y,et al. New Insights into the Roles of Mg in Improving the Rate Capability and Cycling Stability of O3-NaMn0.48Ni0.2Fe0.3Mg0.02O2 for Sodium-Ion Batteries[J]. ACS APPLIED MATERIALS & INTERFACES,2018,10(13):10819-10827.
APA	Shi, R.,Wang, XJ.,黄艳.,陶冶.,郑黎荣.,...&Liang, HB.(2018).New Insights into the Roles of Mg in Improving the Rate Capability and Cycling Stability of O3-NaMn0.48Ni0.2Fe0.3Mg0.02O2 for Sodium-Ion Batteries.ACS APPLIED MATERIALS & INTERFACES,10(13),10819-10827.
MLA	Shi, R,et al."New Insights into the Roles of Mg in Improving the Rate Capability and Cycling Stability of O3-NaMn0.48Ni0.2Fe0.3Mg0.02O2 for Sodium-Ion Batteries".ACS APPLIED MATERIALS & INTERFACES 10.13(2018):10819-10827.