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Improved electrochemical performance of LiCoPO4 using eco-friendly aqueous binders

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Date
01/11/2018
Author
Kim, Eun Jeong
Yue, Xiangling
Irvine, John T. S.
Armstrong, A. Robert
Funder
EPSRC
Grant ID
ep/l017008/1
Keywords
Lithium ion batteries
High-voltage positive electrode materials
Aqueous binders
LiCoPO4
QD Chemistry
NDAS
SDG 7 - Affordable and Clean Energy
SDG 13 - Climate Action
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Abstract
The electrochemical performance of LiCoPO4 (LCP) as a high-voltage positive electrode for lithium-ion batteries is significantly improved by using the aqueous binder sodium carboxymethyl cellulose (CMC). The CMC not only provides a uniform electrode surface as shown by scanning electron microscopy and elemental mapping, but also suppresses the degradation of LiCoPO4 by scavenging HF in the electrolyte solution as demonstrated by FT-IR. In comparison with other water-soluble binders such as sodium alginate (ALG) and polyacrylic acid sodium salt (PAA), the homogeneous distribution of CMC within the electrodes accompanied by high accessibility of carboxylate groups in CMC are shown to be crucial factors to achieve enhanced performance with an excellent capacity retention of 94% after 20 cycles at a rate of C/10.
Citation
Kim , E J , Yue , X , Irvine , J T S & Armstrong , A R 2018 , ' Improved electrochemical performance of LiCoPO 4 using eco-friendly aqueous binders ' , Journal of Power Sources , vol. 403 , pp. 11-19 . https://doi.org/10.1016/j.jpowsour.2018.09.073
Publication
Journal of Power Sources
Status
Peer reviewed
DOI
https://doi.org/10.1016/j.jpowsour.2018.09.073
ISSN
0378-7753
Type
Journal article
Rights
© 2018 Elsevier B.V. All rights reserved. This work has been made available online in accordance with the publisher’s policies. This is the author created accepted version manuscript following peer review and as such may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1016/j.jpowsour.2018.09.073
Description
EJK would like to thank the Alistore ERI for the award of a studentship. The authors thank EPSRC Capital for Great Technologies Grant EP/L017008/1.
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  • University of St Andrews Research
URL
https://www.sciencedirect.com/science/article/pii/S0378775318310528#appsec1
URI
http://hdl.handle.net/10023/18573

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