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Copper Phosphate as a Cathode Material for Rechargeable Li Batteries and Its Electrochemical Reaction Mechanism

Zhong, Guiming ; Bai, Jingyu ; Duchesne, Paul N. ; McDonald, Matthew J. ; Li, Qi ; Hou, Xu LU orcid ; Tang, Joel A. ; Wang, Yu ; Zhao, Wengao and Gong, Zhengliang , et al. (2015) In Chemistry of Materials 27(16). p.5736-5744
Abstract

(Graph Presented) In the search for new cathode materials for rechargeable lithium batteries, conversion-type materials have great potential because of their ability to achieve high specific capacities via the full utilization of transition metal oxidation states. Here, we report for the first time that copper phosphate can be used as a novel high-capacity cathode for rechargeable Li batteries, capable of delivering a reversible capacity of 360 mAh/g with two discharge plateaus of 2.7 and 2.1 V at 400 mA/g. The underlying reaction involves the formation as well as the oxidation of metallic Cu. The solid-state NMR, in situ XAFS, HR-TEM, and XRD results clearly indicate that Cu can react with Li3PO4 to form copper... (More)

(Graph Presented) In the search for new cathode materials for rechargeable lithium batteries, conversion-type materials have great potential because of their ability to achieve high specific capacities via the full utilization of transition metal oxidation states. Here, we report for the first time that copper phosphate can be used as a novel high-capacity cathode for rechargeable Li batteries, capable of delivering a reversible capacity of 360 mAh/g with two discharge plateaus of 2.7 and 2.1 V at 400 mA/g. The underlying reaction involves the formation as well as the oxidation of metallic Cu. The solid-state NMR, in situ XAFS, HR-TEM, and XRD results clearly indicate that Cu can react with Li3PO4 to form copper phosphate and LixCuyPO4 during the charging process, largely determining the reversibility of Cu3(PO4)2. This new reaction scheme provides a new venue to explore polyanion-type compounds as high-capacity cathode materials with conversion reaction processes.

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publishing date
type
Contribution to journal
publication status
published
in
Chemistry of Materials
volume
27
issue
16
pages
9 pages
publisher
The American Chemical Society (ACS)
external identifiers
  • scopus:84940062393
ISSN
0897-4756
DOI
10.1021/acs.chemmater.5b02290
language
English
LU publication?
no
additional info
Publisher Copyright: © 2015 American Chemical Society.
id
f64ca455-afd1-4a40-bf1b-d73a9686d24b
date added to LUP
2025-12-05 22:42:45
date last changed
2025-12-12 12:51:07
@article{f64ca455-afd1-4a40-bf1b-d73a9686d24b,
  abstract     = {{<p>(Graph Presented) In the search for new cathode materials for rechargeable lithium batteries, conversion-type materials have great potential because of their ability to achieve high specific capacities via the full utilization of transition metal oxidation states. Here, we report for the first time that copper phosphate can be used as a novel high-capacity cathode for rechargeable Li batteries, capable of delivering a reversible capacity of 360 mAh/g with two discharge plateaus of 2.7 and 2.1 V at 400 mA/g. The underlying reaction involves the formation as well as the oxidation of metallic Cu. The solid-state NMR, in situ XAFS, HR-TEM, and XRD results clearly indicate that Cu can react with Li<sub>3</sub>PO<sub>4</sub> to form copper phosphate and Li<sub>x</sub>Cu<sub>y</sub>PO<sub>4</sub> during the charging process, largely determining the reversibility of Cu<sub>3</sub>(PO<sub>4</sub>)<sub>2</sub>. This new reaction scheme provides a new venue to explore polyanion-type compounds as high-capacity cathode materials with conversion reaction processes.</p>}},
  author       = {{Zhong, Guiming and Bai, Jingyu and Duchesne, Paul N. and McDonald, Matthew J. and Li, Qi and Hou, Xu and Tang, Joel A. and Wang, Yu and Zhao, Wengao and Gong, Zhengliang and Zhang, Peng and Fu, Riqiang and Yang, Yong}},
  issn         = {{0897-4756}},
  language     = {{eng}},
  month        = {{08}},
  number       = {{16}},
  pages        = {{5736--5744}},
  publisher    = {{The American Chemical Society (ACS)}},
  series       = {{Chemistry of Materials}},
  title        = {{Copper Phosphate as a Cathode Material for Rechargeable Li Batteries and Its Electrochemical Reaction Mechanism}},
  url          = {{http://dx.doi.org/10.1021/acs.chemmater.5b02290}},
  doi          = {{10.1021/acs.chemmater.5b02290}},
  volume       = {{27}},
  year         = {{2015}},
}