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Chinese Academy of Sciences Institutional Repositories Grid
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

文献类型:期刊论文

作者Zhang, Cheng1,2; Gao, Rui1; Zheng, Lirong3; Hao, Yongmei2; Liu, Xiangfeng1
刊名Acs applied materials & interfaces
出版日期2018-04-04
卷号10期号:13页码:10819-10827
ISSN号1944-8244
关键词Sodium-ion battery Layered oxide cathode O3 phase Mg doping Improvement mechanism
DOI10.1021/acsami.7b18226
通讯作者Hao, yongmei(ymhao@ucas.ac.cn) ; Liu, xiangfeng(liuxf@ucas.ac.cn)
英文摘要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.
WOS关键词CATHODE MATERIALS ; HIGH-CAPACITY ; ELECTROCHEMICAL PERFORMANCE ; O3-TYPE ; P2-NA2/3CO2/3MN1/3O2 ; INTERCALATION ; TRANSITION ; DIFFUSION ; ELECTRODE ; LAYER
WOS研究方向Science & Technology - Other Topics ; Materials Science
WOS类目Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
语种英语
出版者AMER CHEMICAL SOC
WOS记录号WOS:000429625400024
URI标识http://www.irgrid.ac.cn/handle/1471x/2178173
专题高能物理研究所
通讯作者Hao, Yongmei; Liu, Xiangfeng
作者单位1.Univ Chinese Acad Sci, Coll Mat Sci & Optoelect Technol, Beijing 100049, Peoples R China
2.Univ Chinese Acad Sci, Sch Chem & Chem Engn, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China
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Zhang, Cheng,Gao, Rui,Zheng, Lirong,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 Zhang, Cheng,Gao, Rui,Zheng, Lirong,Hao, Yongmei,&Liu, Xiangfeng.(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 Zhang, Cheng,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.

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