Differences in interfacial reactivity of graphite and lithium metal battery electrodes investigated via operando gas analysis
Differences in interfacial reactivity of graphite and lithium metal battery electrodes investigated via operando gas analysis
Gases evolved from lithium batteries can drastically affect their performance and safety; for example, cell swelling is a serious safety issue. Here we combine operando pressure measurements and online electrochemical mass spectrometry measurements to identify the nature and quantity of gases formed in batteries with graphite and lithium metal electrodes. We demonstrate that ethylene, a main gas evolved in SEI formation reactions, is quickly consumed at lithium metal electrodes, unless they have been pretreated in the electrolyte. The formation of polyolefines such as polyethylene is suggested as possible reaction product from ethylene consumption, evidencing another pathway of SEI formation that had been previously overlooked because it does not produce any gas product.
13395-13401
Vivek, J. Padmanabhan
edf1af56-581e-4653-9887-b98a99c0e314
Garcia-Araez, Nuria
9358a0f9-309c-495e-b6bf-da985ad81c37
15 August 2024
Vivek, J. Padmanabhan
edf1af56-581e-4653-9887-b98a99c0e314
Garcia-Araez, Nuria
9358a0f9-309c-495e-b6bf-da985ad81c37
Vivek, J. Padmanabhan and Garcia-Araez, Nuria
(2024)
Differences in interfacial reactivity of graphite and lithium metal battery electrodes investigated via operando gas analysis.
The Journal of Physical Chemistry C, 128 (32), .
(doi:10.1021/acs.jpcc.4c03656).
Abstract
Gases evolved from lithium batteries can drastically affect their performance and safety; for example, cell swelling is a serious safety issue. Here we combine operando pressure measurements and online electrochemical mass spectrometry measurements to identify the nature and quantity of gases formed in batteries with graphite and lithium metal electrodes. We demonstrate that ethylene, a main gas evolved in SEI formation reactions, is quickly consumed at lithium metal electrodes, unless they have been pretreated in the electrolyte. The formation of polyolefines such as polyethylene is suggested as possible reaction product from ethylene consumption, evidencing another pathway of SEI formation that had been previously overlooked because it does not produce any gas product.
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vivek-garcia-araez-2024-differences-in-interfacial-reactivity-of-graphite-and-lithium-metal-battery-electrodes
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Accepted/In Press date: 17 July 2024
e-pub ahead of print date: 6 August 2024
Published date: 15 August 2024
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Local EPrints ID: 492629
URI: http://eprints.soton.ac.uk/id/eprint/492629
ISSN: 1932-7447
PURE UUID: ab2c7c5e-64b3-4842-8e9c-17c838227ac9
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Date deposited: 08 Aug 2024 16:35
Last modified: 19 Dec 2024 02:51
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Author:
J. Padmanabhan Vivek
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