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通过在线冷阱预浓缩器-气相色谱/质谱联用系统对锂氧电池充放电循环过程中降解产物的生成与分解进行实时监测。

Real time monitoring of generation and decomposition of degradation products in lithium oxygen batteries during discharge/charge cycles by an online cold trap pre-concentrator-gas chromatography/mass spectroscopy system.

作者信息

Gao Yanan, Noguchi Hidenori, Uosaki Kohei

机构信息

Graduate School of Chemical Sciences and Engineering, Hokkaido University Sapporo 060-8628 Japan.

Center for Green Research on Energy and Environmental Materials, National Institute for Materials Science (NIMS) Tsukuba 305-0044 Japan.

出版信息

RSC Adv. 2023 Feb 14;13(8):5467-5472. doi: 10.1039/d2ra07670e. eCollection 2023 Feb 6.

DOI:10.1039/d2ra07670e
PMID:36798613
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9926056/
Abstract

Degradation products of lithium oxygen batteries with a tetraethylene glycol dimethyl ether (TEGDME) electrolyte solution during discharge/charge cycles were monitored by an online cold trap pre-concentrator-gas chromatography/mass spectroscopy system in real time. A total of 37 peaks were detected and 27 of them were assigned to specific molecules. Degradation compounds were generated and decomposed in very complex manners during discharge/charge cycles. Most molecules were generated during charge as a result of the degradation of TEGDME by active oxygen species and/or electrochemical oxidation. These molecules generated during charge were decomposed during discharge by active oxygen species.

摘要

采用在线冷阱预浓缩器-气相色谱/质谱联用系统实时监测了以四甘醇二甲醚（TEGDME）为电解液的锂氧电池在充放电循环过程中的降解产物。共检测到37个峰，其中27个峰对应特定分子。降解化合物在充放电循环过程中以非常复杂的方式生成和分解。大多数分子是在充电过程中由活性氧物种和/或电化学氧化导致TEGDME降解而产生的。这些在充电过程中生成的分子在放电过程中被活性氧物种分解。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3de7/9926056/9b594efae375/d2ra07670e-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3de7/9926056/1ed18cc3d78e/d2ra07670e-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3de7/9926056/e25a9976cf94/d2ra07670e-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3de7/9926056/8e8a04def3bf/d2ra07670e-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3de7/9926056/9b594efae375/d2ra07670e-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3de7/9926056/1ed18cc3d78e/d2ra07670e-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3de7/9926056/e25a9976cf94/d2ra07670e-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3de7/9926056/8e8a04def3bf/d2ra07670e-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3de7/9926056/9b594efae375/d2ra07670e-f4.jpg

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