Ti-Substituted NaNi0.5Mn0.5-xTixO2 Cathodes with Reversible O3-P3 Phase Transition for High-Performance Sodium-Ion Batteries

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	Ti-Substituted NaNi0.5Mn0.5-xTixO2 Cathodes with Reversible O3-P3 Phase Transition for High-Performance Sodium-Ion Batteries
	Wang, Peng-Fei 1; Yao, Hu-Rong 1,2; Liu, Xin-Yu 3; Zhang, Jie-Nan 3; Gu, Lin 3; Yu, Xi-Qian 3; Yin, Ya-Xia 1,2; Guo, Yu-Guo 1,2
刊名	ADVANCED MATERIALS
	2017-05-17
卷号	29 期号:19
关键词	Cathodes Electrochemistry O3-p3 Phase Transition Sodium-ion Batteries
英文摘要	Sodium-ion batteries (SIBs) have been considered as potential candidates for stationary energy storage because of the low cost and wide availability of Na sources. O3-type layered oxides have been considered as one of the most promising cathodes for SIBs. However, they commonly show inevitable complicated phase transitions and sluggish kinetics, incurring rapid capacity decline and poor rate capability. Here, a series of sodium-sufficient O3-type NaNi0.5Mn0.5- (x) Ti (x) O-2 (0 x 0.5) cathodes for SIBs is reported and the mechanisms behind their excellent electrochemical performance are studied in comparison to those of their respective end-members. The combined analysis of in situ X-ray diffraction, ex situ X-ray absorption spectroscopy, and scanning transmission electron microscopy for NaNi0.5Mn0.2Ti0.3O2 reveals that the O3-type phase transforms reversibly into a P3-type phase upon Na+ deintercalation/intercalation. The substitution of Ti for Mn enlarges interslab distance and could restrain the unfavorable and irreversible multiphase transformation in the high voltage regions that is usually observed in O3-type NaNi0.5Mn0.5O2, resulting in improved Na cell performance. This integration of macroscale and atomicscale engineering strategy might open up the modulation of the chemical and physical properties in layered oxides and grasp new insight into the optimal design of high-performance cathode materials for SIBs.
语种	英语
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/38385]
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, Inst Chem, Beijing Natl Lab Mol Sci, CAS Key Lab Mol Nanostruct & Nanotechnol, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Sch Chem & Chem Engn, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Wang, Peng-Fei,Yao, Hu-Rong,Liu, Xin-Yu,et al. Ti-Substituted NaNi0.5Mn0.5-xTixO2 Cathodes with Reversible O3-P3 Phase Transition for High-Performance Sodium-Ion Batteries[J]. ADVANCED MATERIALS,2017,29(19).
APA	Wang, Peng-Fei.,Yao, Hu-Rong.,Liu, Xin-Yu.,Zhang, Jie-Nan.,Gu, Lin.,...&Guo, Yu-Guo.(2017).Ti-Substituted NaNi0.5Mn0.5-xTixO2 Cathodes with Reversible O3-P3 Phase Transition for High-Performance Sodium-Ion Batteries.ADVANCED MATERIALS,29(19).
MLA	Wang, Peng-Fei,et al."Ti-Substituted NaNi0.5Mn0.5-xTixO2 Cathodes with Reversible O3-P3 Phase Transition for High-Performance Sodium-Ion Batteries".ADVANCED MATERIALS 29.19(2017).