Imperial College London
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Professor Peter Haynes

Central Faculty, Office of the Provost

Vice-Provost (Education and Student Experience)
 
 
 
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Contact

 

p.haynes Website

 
 
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Assistant

 

Mrs Anushka Patel +44 (0)20 7594 6070

 
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Location

 

409Faculty BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Yadegari:2021:10.1021/acsenergylett.1c00494,
author = {Yadegari, H and Koronfel, MA and Wang, K and Thornton, DB and Stephens, IEL and Molteni, C and Haynes, PD and Ryan, MP},
doi = {10.1021/acsenergylett.1c00494},
journal = {ACS Energy Letters},
pages = {1633--1638},
title = {Operando measurement of layer breathing modes in lithiated graphite},
url = {http://dx.doi.org/10.1021/acsenergylett.1c00494},
volume = {6},
year = {2021}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Despite their ubiquitous usage and increasing societal dependence on Li-ion batteries, there remains a lack of detailed empirical evidence of Li intercalation/deintercalation into graphite even though this process dictates the performance, longevity, and safety of the system. Here, we report direct detection and dissociation of specific crystallographic phases in the lithiated graphite, which form through a stepwise staging process. Using operando measurements, LiC18, LiC12, and LiC6 phases are observed via distinct low-frequency Raman features, which are the result of displacement of the graphite lattice by induced local strain. Density functional theory calculations confirm the nature of the Raman-active vibrational modes, to the layer breathing modes (LBMs) of the lithiated graphite. The new findings indicate graphene-like characteristics in the lithiated graphite under the deep charged condition due to the imposed strain by the inserted Li. Moreover, our approach also provides a simple experimental tool to measure induced strain in the graphite structure under full intercalation conditions.
AU  - Yadegari,H
AU  - Koronfel,MA
AU  - Wang,K
AU  - Thornton,DB
AU  - Stephens,IEL
AU  - Molteni,C
AU  - Haynes,PD
AU  - Ryan,MP
DO  - 10.1021/acsenergylett.1c00494
EP  - 1638
PY  - 2021///
SN  - 2380-8195
SP  - 1633
TI  - Operando measurement of layer breathing modes in lithiated graphite
T2  - ACS Energy Letters
UR  - http://dx.doi.org/10.1021/acsenergylett.1c00494
UR  - https://pubs.acs.org/doi/10.1021/acsenergylett.1c00494
UR  - http://hdl.handle.net/10044/1/88168
VL  - 6
ER  -
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