Structure-Induced Reversible Anionic Redox Activity in Na Layered Oxide Cathode

被引：382

作者：

Rong, Xiaohui ^{[1
]}

Liu, Jue ^{[2
]}

Hu, Enyuan ^{[3
]}

Liu, Yijin ^{[4
]}

Wang, Yi ^{[1
]}

Wu, Jinpeng ^{[5
]}

Yu, Xiqian ^{[1
]}

Page, Katharine ^{[2
]}

Hu, Yong-Sheng ^{[1
]}

Yang, Wanli ^{[5
]}

Li, Hong ^{[1
]}

Yang, Xiao-Qing ^{[3
]}

Chen, Liquan ^{[1
]}

Huang, Xuejie ^{[1
]}

机构：

[1] Univ Chinese Acad Sci, Sch Phys Sci, Chinese Acad Sci,Inst Phys, Beijing Key Lab New Energy Mat & Devices,Key Lab, Beijing 100190, Peoples R China

[2] Oak Ridge Natl Lab, Chem & Engn Mat Div, Oak Ridge, TN 37831 USA

[3] Brookhaven Natl Lab, Chem Div, Upton, NY 11973 USA

[4] SLAC Natl Accelerator Lab, Stanford Synchrotron Radiat Lightsource, Menlo Pk, CA 94025 USA

[5] Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA

来源：

JOULE | 2018年 / 2卷 / 01期

关键词：

PAIR DISTRIBUTION FUNCTION; POSITIVE ELECTRODE MATERIAL; X-RAY-DIFFRACTION; ION BATTERIES; CHARGE-COMPENSATION; LI; OXYGEN; CAPACITY; NANOSCALE; NMR;

D O I：

10.1016/j.joule.2017.10.008

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Anionic redox reaction (ARR) in lithium-and sodium-ion batteries is under hot discussion, mainly regarding how oxygen anion participates and to what extent oxygen can be reversibly oxidized and reduced. Here, a P3-type Na-0.6[Li0.2Mn0.8]O-2 with reversible capacity from pure ARR was studied. The interlayer O-O distance (peroxo-like O-O dimer, 2.506(3)angstrom), associated with oxidization of oxygen anions, was directly detected by using a neutron total scattering technique. Different from Li2RuO3 or Li2IrO3 with strong metal-oxygen (M-O) bonding, for P3-type Na-0.6[Li0.2Mn0.8]O-2 with relatively weak Mn-O covalent bonding, crystal structure factors might play an even more important role in stabilizing the oxidized species, as both Li and Mn ions are immobile in the structure and thus may inhibit the irreversible transformation of the oxidized species to O-2 gas.

引用

页码：125 / 140

页数：16

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