Designing Air-Stable O3-Type Cathode Materials by Combined Structure Modulation for Na-Ion Batteries

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	Designing Air-Stable O3-Type Cathode Materials by Combined Structure Modulation for Na-Ion Batteries
	Yao, Hu-Rong 1,4; Wang, Peng-Fei 1,4; Gong, Yue 2; Zhang, Jienan 2; Yu, Xiqian 2; Gu, Lin 2,4; OuYang, Chuying 3; Yin, Ya-Xia 1,4; Hu, Enyuan 5; Yang, Xiao-Qing 5
刊名	JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
	2017-06-28
卷号	139 期号:25 页码:8440-8443
英文摘要	As promising high-capacity cathode materials for Na-ion batteries, O3-type Na-based metal oxides always suffer from their poor air stability originating from the spontaneous extraction of Na and oxidation of transition metals when exposed to air. Herein, a combined structure modulation is proposed to tackle concurrently the two handicaps via reducing Na layers spacing and simultaneously increasing valence state of transition Metals. Guided by density functional theory calculations, we demonstrate such a modulation can be subtly realized through cosubstitution of one kind of heteroatom with comparable electronegativity and another one with Substantially different Fermi level, by adjusting, the structure of NaNi0.5Mn0.5O2 via Cu/Ti codoping. The as-obtained NaNi0.45Cu0.05Mn0.4Ti0.1O2 exhibits an increase of 20 times in stable air-exposure period and 9 times in capacity retention after 500 cycles,. and even retains its structure and capacity after being soaked in water. Such a simple and effective structure modulation reveals a new avenue for high-performance O3-type cathodes and pushes the large-scale industrialization of Na-ion batteries a decisive step forward.
语种	英语
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/39012]
专题	化学研究所_分子纳米结构与纳米技术实验室
作者单位	1.Chinese Acad Sci, CAS Key Lab Mol Nanostruct & Nanotechnol, CAS Res Educ Ctr Excellence Mol Sci, Inst Chem, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China 3.Jiangxi Normal Univ, Lab Computat Mat Phys, Dept Phys, Nanchang 330022, Jiangxi, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 5.Brookhaven Natl Lab, Upton, NY 11973 USA
推荐引用方式 GB/T 7714	Yao, Hu-Rong,Wang, Peng-Fei,Gong, Yue,et al. Designing Air-Stable O3-Type Cathode Materials by Combined Structure Modulation for Na-Ion Batteries[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,2017,139(25):8440-8443.
APA	Yao, Hu-Rong.,Wang, Peng-Fei.,Gong, Yue.,Zhang, Jienan.,Yu, Xiqian.,...&Wan, Li-Jun.(2017).Designing Air-Stable O3-Type Cathode Materials by Combined Structure Modulation for Na-Ion Batteries.JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,139(25),8440-8443.
MLA	Yao, Hu-Rong,et al."Designing Air-Stable O3-Type Cathode Materials by Combined Structure Modulation for Na-Ion Batteries".JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 139.25(2017):8440-8443.