Visualization of O-O peroxo-like dimers in high-capacity layered oxides for Li-ion batteries

被引：727

作者：

McCalla, Eric ^{[1
,2
,3
,4
]}

Abakumov, Artem M. ^{[5
,6
]}

Saubanere, Matthieu ^{[2
,3
,7
]}

Foix, Dominique ^{[2
,3
,8
]}

Berg, Erik J. ^{[9
]}

Rousse, Gwenaelle ^{[1
,3
,10
]}

Doublet, Marie-Liesse ^{[2
,3
,7
]}

Gonbeau, Danielle ^{[2
,3
,8
]}

Novak, Petr ^{[9
]}

Van Tendeloo, Gustaaf ^{[5
]}

Dominko, Robert ^{[4
]}

Tarascon, Jean-Marie ^{[1
,2
,3
,10
]}

机构：

[1] Coll France, Chim Solide & Energie, FRE 3677, 11 Pl Marcelin Berthelot, F-75231 Paris 05, France

[2] FR CNRS 3104, ALISTORE European Res Inst, F-80039 Amiens, France

[3] FR CNRS 3459, RS2E, Paris, France

[4] Natl Inst Chem, SI-1000 Ljubljana, Slovenia

[5] Univ Antwerp, Electron Microscopy Mat Sci EMAT, B-2020 Antwerp, Belgium

[6] Skolkovo Inst Sci & Technol, Ctr Electrochem Energy Storage, Moscow 143026, Russia

[7] Univ Montpellier, CNRS UMR 5253, Inst Charles Gerhardt, F-34095 Montpellier, France

[8] Univ Pau, IPREM ECP UMR 5254, F-64053 Pau 9, France

[9] Paul Scherrer Inst, Electrochem Lab, CH-5232 Villigen, Switzerland

[10] Univ Paris 06, Sorbonne Univ, F-75005 Paris, France

来源：

SCIENCE | 2015年 / 350卷 / 6267期

基金：

欧洲研究理事会;

关键词：

X-RAY-ABSORPTION; ELECTRODE MATERIALS; POSITIVE ELECTRODE; CHARGE COMPENSATION; CATHODE MATERIALS; ANIONIC REDOX; LITHIUM; INTERCALATION; DIFFRACTION; CRYSTAL;

D O I：

10.1126/science.aac8260

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Lithium-ion (Li-ion) batteries that rely on cationic redox reactions are the primary energy source for portable electronics. One pathway toward greater energy density is through the use of Li-rich layered oxides. The capacity of this class of materials (>270 milliampere hours per gram) has been shown to be nested in anionic redox reactions, which are thought to form peroxo-like species. However, the oxygen-oxygen (O-O) bonding pattern has not been observed in previous studies, nor has there been a satisfactory explanation for the irreversible changes that occur during first delithiation. By using Li2IrO3 as a model compound, we visualize the O-O dimers via transmission electron microscopy and neutron diffraction. Our findings establish the fundamental relation between the anionic redox process and the evolution of the O-O bonding in layered oxides.

引用

页码：1516 / 1521

页数：6

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