Copper-substituted Na0.67Ni0.3-xCuxMn0.7O2 cathode materials for sodium-ion batteries with suppressed P2-O2 phase transition

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	Copper-substituted Na0.67Ni0.3-xCuxMn0.7O2 cathode materials for sodium-ion batteries with suppressed P2-O2 phase transition
	Wang, Lei 1,2; Sun, Yong-Gang 2,3; Hu, Lin-Lin 2,3; Piao, Jun-Yu 2,3; Guo, Jing 1,2; Manthiram, Arumugam 4; Ma, Jianmin 1; Cao, An-Min 2,3
刊名	JOURNAL OF MATERIALS CHEMISTRY A
	2017-05-14
卷号	5 期号:18 页码:8752-8761
英文摘要	P2-type sodium layered oxides NaxMO2 (M = transition metal) are considered as one kind of promising cathode material for sodium-ion batteries because of their known structures, superior electrochemical properties, and their ease of synthesis. The Ni2+/Ni3+ and Ni3+/Ni4+ redox reactions endow the P2-Na2/3Ni1/3Mn2/3O2 electrode with a relatively high operating voltage and high specific capacity. However, the phase transition from P2 to O-2 and Na+/vacancy ordering make P2-Na2/3Ni1/3Mn2/3O2 susceptible to severe voltage and capacity decay. Herein, we propose to employ the electrochemically active copper(II) as a unique substituent to stabilize the P2 phase, forming Na0.67Ni0.3-xCuxMn0.7O2 (x = 0, 0.1, 0.2 and 0.3). Our work highlights the importance of Cu(II) in the structural engineering of high performance cathode materials, whose existence can not only stabilize the P2 phase against the notorious phase transition, but also contribute to the rechargeable capacity due to the high potential Cu2+/Cu3+ redox. We identified that the cathode formulated as P2-type Na0.67Ni0.1Cu0.2Mn0.7O2 shows favorable battery performance with much-alleviated structural degradation.
语种	英语
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/39060]
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.Hunan Univ, Sch Phys & Elect, Changsha 410082, Hunan, Peoples R China 2.Chinese Acad Sci, Key Lab Mol Nanostruct & Nanotechnol, Beijing Natl Lab Mol Sci, Inst Chem, Beijing 100190, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Univ Texas Austin, Texas Mat Inst, Mat Sci & Engn Program, Austin, TX 78712 USA
推荐引用方式 GB/T 7714	Wang, Lei,Sun, Yong-Gang,Hu, Lin-Lin,et al. Copper-substituted Na0.67Ni0.3-xCuxMn0.7O2 cathode materials for sodium-ion batteries with suppressed P2-O2 phase transition[J]. JOURNAL OF MATERIALS CHEMISTRY A,2017,5(18):8752-8761.
APA	Wang, Lei.,Sun, Yong-Gang.,Hu, Lin-Lin.,Piao, Jun-Yu.,Guo, Jing.,...&Cao, An-Min.(2017).Copper-substituted Na0.67Ni0.3-xCuxMn0.7O2 cathode materials for sodium-ion batteries with suppressed P2-O2 phase transition.JOURNAL OF MATERIALS CHEMISTRY A,5(18),8752-8761.
MLA	Wang, Lei,et al."Copper-substituted Na0.67Ni0.3-xCuxMn0.7O2 cathode materials for sodium-ion batteries with suppressed P2-O2 phase transition".JOURNAL OF MATERIALS CHEMISTRY A 5.18(2017):8752-8761.