Electrochemical reactions of lithium with CuP2 and Li1.75Cu1.25P2 synthesized by ballmilling

Ke Wang; Jun Yang; Jingying Xie; Baofeng Wang; Zhongsheng Wen

doi:10.1016/S1388-2481(03)00110-3

Electrochemical reactions of lithium with CuP₂ and Li_1.75Cu_1.25P₂ synthesized by ballmilling

Ke Wang
, Jun Yang
, Jingying Xie
, Baofeng Wang
, Zhongsheng Wen

Chinese Academy of Sciences

Research output: Contribution to journal › Article › peer-review

86 Scopus citations

Abstract

Copper phosphide (CuP₂) and lithium copper phosphide (Li_1.75Cu_1.25P₂) were synthesized by high-energy ballmilling at room temperature. The electrochemical reactions between lithium and these samples have been studied. The first lithium insertion into the CuP₂ phase till 0.0 V vs. Li leads to copper reduction and the formation of lithium phosphide (Li₃P), corresponding to a long voltage plateau. The subsequent lithium extraction until 1.3 V vs. Li presents three voltage plateaus related to the formation of new phases such as Li₂CuP, giving a reversible capacity about 810 mAh/g and faradic yield about 61%. It means that both copper and phosphorus face a change of the oxidation state for the electrochemical insertion and extraction. Lithium copper phosphide exhibits a similar reaction process. However, it provides a reversible capacity of 750 mAh/g and faradic yield of 100% at the first cycle.

Original language	English
Pages (from-to)	480-483
Number of pages	4
Journal	Electrochemistry Communications
Volume	5
Issue number	6
DOIs	https://doi.org/10.1016/S1388-2481(03)00110-3
State	Published - 1 Jun 2003
Externally published	Yes

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

Ballmilling synthesis
Copper phosphide
Insertion anode
Lithium-ion batteries
Reversibility

Access to Document

10.1016/S1388-2481(03)00110-3

Cite this

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title = "Electrochemical reactions of lithium with CuP2 and Li1.75Cu1.25P2 synthesized by ballmilling",

abstract = "Copper phosphide (CuP2) and lithium copper phosphide (Li1.75Cu1.25P2) were synthesized by high-energy ballmilling at room temperature. The electrochemical reactions between lithium and these samples have been studied. The first lithium insertion into the CuP2 phase till 0.0 V vs. Li leads to copper reduction and the formation of lithium phosphide (Li3P), corresponding to a long voltage plateau. The subsequent lithium extraction until 1.3 V vs. Li presents three voltage plateaus related to the formation of new phases such as Li2CuP, giving a reversible capacity about 810 mAh/g and faradic yield about 61\%. It means that both copper and phosphorus face a change of the oxidation state for the electrochemical insertion and extraction. Lithium copper phosphide exhibits a similar reaction process. However, it provides a reversible capacity of 750 mAh/g and faradic yield of 100\% at the first cycle.",

keywords = "Ballmilling synthesis, Copper phosphide, Insertion anode, Lithium-ion batteries, Reversibility",

author = "Ke Wang and Jun Yang and Jingying Xie and Baofeng Wang and Zhongsheng Wen",

year = "2003",

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doi = "10.1016/S1388-2481(03)00110-3",

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TY - JOUR

T1 - Electrochemical reactions of lithium with CuP2 and Li1.75Cu1.25P2 synthesized by ballmilling

AU - Wang, Ke

AU - Yang, Jun

AU - Xie, Jingying

AU - Wang, Baofeng

AU - Wen, Zhongsheng

PY - 2003/6/1

Y1 - 2003/6/1

N2 - Copper phosphide (CuP2) and lithium copper phosphide (Li1.75Cu1.25P2) were synthesized by high-energy ballmilling at room temperature. The electrochemical reactions between lithium and these samples have been studied. The first lithium insertion into the CuP2 phase till 0.0 V vs. Li leads to copper reduction and the formation of lithium phosphide (Li3P), corresponding to a long voltage plateau. The subsequent lithium extraction until 1.3 V vs. Li presents three voltage plateaus related to the formation of new phases such as Li2CuP, giving a reversible capacity about 810 mAh/g and faradic yield about 61%. It means that both copper and phosphorus face a change of the oxidation state for the electrochemical insertion and extraction. Lithium copper phosphide exhibits a similar reaction process. However, it provides a reversible capacity of 750 mAh/g and faradic yield of 100% at the first cycle.

AB - Copper phosphide (CuP2) and lithium copper phosphide (Li1.75Cu1.25P2) were synthesized by high-energy ballmilling at room temperature. The electrochemical reactions between lithium and these samples have been studied. The first lithium insertion into the CuP2 phase till 0.0 V vs. Li leads to copper reduction and the formation of lithium phosphide (Li3P), corresponding to a long voltage plateau. The subsequent lithium extraction until 1.3 V vs. Li presents three voltage plateaus related to the formation of new phases such as Li2CuP, giving a reversible capacity about 810 mAh/g and faradic yield about 61%. It means that both copper and phosphorus face a change of the oxidation state for the electrochemical insertion and extraction. Lithium copper phosphide exhibits a similar reaction process. However, it provides a reversible capacity of 750 mAh/g and faradic yield of 100% at the first cycle.

KW - Ballmilling synthesis

KW - Copper phosphide

KW - Insertion anode

KW - Lithium-ion batteries

KW - Reversibility

UR - https://www.scopus.com/pages/publications/0037599622

U2 - 10.1016/S1388-2481(03)00110-3

DO - 10.1016/S1388-2481(03)00110-3

M3 - 文章

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SN - 1388-2481

VL - 5

SP - 480

EP - 483

JO - Electrochemistry Communications

JF - Electrochemistry Communications

IS - 6

ER -