Li Plating on Carbon Electrode Surface Probed by Low-Field Dynamic Nuclear Polarization 7Li NMR

Lithium deposition on graphite electrode not only reduces fast-charging capability of lithium ion batteries but also causes safety trouble.Here,a low-field 7Li dynamic nuclear polarization (DNP) is used to probe Li plating on the surfaces of three types of carbon electrodes:hard carbon,soft carbon a...

Full description

Saved in:
Bibliographic Details
Published in:中国物理快报（英文版） 2021-12, Vol.38 (12), p.34-38
Main Authors: Zhekai Zhang, Jiyu Tian, Junfei Chen, Yugui He, Chaoyang Liu, Xinmiao Liang, Jiwen Feng
Format: Article
Language:English
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Lithium deposition on graphite electrode not only reduces fast-charging capability of lithium ion batteries but also causes safety trouble.Here,a low-field 7Li dynamic nuclear polarization (DNP) is used to probe Li plating on the surfaces of three types of carbon electrodes:hard carbon,soft carbon and graphite.Owing to the strong Fermi contact interaction between 7Li and conduction electrons,the 7Li nuclear-magnetic-resonance (NMR) signal of Li metal deposited on electrode surface could be selectively enhanced by DNP.It is suggested that low-field 7Li DNP spectroscopy is a sensitive tool for investigating Li deposition on electrodes during charging/discharging processes.
ISSN:0256-307X
DOI:10.1088/0256-307X/38/12/126801