Chemical versus Electrochemical Electrolyte Oxidation on NMC111, NMC622, NMC811, LNMO, and Conductive Carbon

被引：409

作者：

Jung, Roland ^{[1
,2
,3
]}

Metzger, Michael ^{[1
,2
]}

Maglia, Filippo ^{[3
]}

Stinner, Christoph ^{[3
]}

Gasteiger, Hubert A. ^{[1
,2
]}

机构：

[1] Tech Univ Munich, Dept Chem, Chair Tech Electrochem, Lichtenbergstr 4, D-85748 Garching, Germany

[2] Tech Univ Munich, Catalysis Res Ctr, Lichtenbergstr 4, D-85748 Garching, Germany

[3] BMW AG, Petuelring 130, D-80788 Munich, Germany

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2017年 / 8卷 / 19期

关键词：

LITHIUM-ION BATTERIES; SITU GAS EVOLUTION; IN-SITU; HIGH-VOLTAGE; MASS-SPECTROMETRY; POUCH CELLS; CATHODE MATERIALS; OXYGEN RELEASE; ISOTHERMAL MICROCALORIMETRY; HIGH POTENTIALS;

D O I：

10.1021/acs.jpclett.7b01927

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：

We compare the stability of alkyl carbonate electrolyte on NMC111, -622, and -811, LNMO, and conductive carbon electrodes. We prove that CO, and CO evolution onset potentials depend on the electrode material and increase in the order NMC811 < NMC111 approximate to NMC622 < conductive carbon approximate to LNMO, which we rationalize by two fundamentally different oxidation mechanisms, the chemical and the electrochemical electrolyte oxidation. Additionally, in contrast to the widespread understanding that transition metals in cathode active materials catalyze the electrolyte oxidation, we will prove that such a catalytic effect on the electrochemical electrolyte oxidation does not exist.

引用

页码：4820 / 4825

页数：6

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