In Situ Transmission Electron Microscopy Observations of Electrochemical Oxidation of Li2O2

被引：205

作者：

Zhong, Li ^{[1
]}

Mitchell, Robert R. ^{[2
]}

Liu, Yang ^{[3
]}

Gallant, Betar M. ^{[4
]}

Thompson, Carl V. ^{[2
]}

Huang, Jian Yu ^{[3
]}

Mao, Scott X. ^{[1
]}

Shao-Horn, Yang ^{[2
,4
]}

机构：

[1] Univ Pittsburgh, Dept Mech Engn & Mat Sci, Pittsburgh, PA 15261 USA

[2] MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA

[3] Sandia Natl Labs, Ctr Integrated Nanotechnol, Albuquerque, NM 87185 USA

[4] MIT, Dept Mech Engn, Cambridge, MA 02139 USA

来源：

NANO LETTERS | 2013年 / 13卷 / 05期

基金：

美国国家科学基金会;

关键词：

Lithium peroxide; oxidation kinetics; electron-transport limited; lithium-air battery; in situ TEM study; BATTERY ELECTRODES; LITHIUM PEROXIDE; SNO2; NANOWIRE; LI-O-2; EVOLUTION; LITHIATION; DISCHARGE; CATALYSTS; FRACTURE;

D O I：

10.1021/nl400731w

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In this Letter, we report the first in situ transmission electron microscopy observation of electrochemical oxidation of Li2O2, providing insights into the rate limiting processes that govern charge in Li-O-2 cells. In these studies, oxidation of electrochemically formed Li2O2 particles, supported on multiwall carbon nanotutubes (MWCNTs), was found to occur preferentially at the MWCNT/Li2O2 interface, suggesting that electron transport in Li2O2 ultimately limits the oxidation kinetics at high rates or overpotentials.

引用

页码：2209 / 2214

页数：6

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