Synthesis and performance of Li3(V1-xMgx)2(PO4)3 cathode materials

Changsong Dai; Zhenyu Chen; Haizu Jin; Xinguo Hu

doi:10.1016/j.jpowsour.2010.02.081

Synthesis and performance of Li₃(V_1-xMg_x)₂(PO₄)₃ cathode materials

Changsong Dai^*
, Zhenyu Chen
, Haizu Jin
, Xinguo Hu

^*Corresponding author for this work

School of Chemistry and Chemical Engineering, Harbin Institute of Technology

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

142 Scopus citations

Abstract

In order to search for cathode materials with better performance, Li₃(V_1-xMg_x)₂(PO₄)₃ (0, 0.04, 0.07, 0.10 and 0.13) is prepared via a carbothermal reduction (CTR) process with LiOH·H₂O, V₂O₅, Mg(CH₃COO)₂·4H₂O, NH₄H₂PO₄, and sucrose as raw materials and investigated by X-ray diffraction (XRD), scanning electron microscopic (SEM) and electrochemical impedance spectrum (EIS). XRD shows that Li₃(V_1-xMg_x)₂(PO₄)₃ (x = 0.04, 0.07, 0.10 and 0.13) has the same monoclinic structure as undoped Li₃V₂(PO₄)₃ while the particle size of Li₃(V_1-xMg_x)₂(PO₄)₃ is smaller than that of Li₃V₂(PO₄)₃ according to SEM images. EIS reveals that the charge transfer resistance of as-prepared materials is reduced and its reversibility is enhanced proved by the cyclic votammograms. The Mg²⁺-doped Li₃V₂(PO₄)₃ has a better high rate discharge performance. At a discharge rate of 20 C, the discharge capacity of Li₃(V_0.9Mg_0.1)₂(PO₄)₃ is 107 mAh g^-1 and the capacity retention is 98% after 80 cycles. Li₃(V_0.9Mg_0.1)₂(PO₄)₃//graphite full cells (085580-type) have good discharge performance and the modified cathode material has very good compatibility with graphite.

Original language	English
Pages (from-to)	5775-5779
Number of pages	5
Journal	Journal of Power Sources
Volume	195
Issue number	17
DOIs	https://doi.org/10.1016/j.jpowsour.2010.02.081
State	Published - 1 Sep 2010
Externally published	Yes

UN SDGs

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

SDG 7 Affordable and Clean Energy

Keywords

Carbothermal reduction method
Cathode material
Doping
Lithium ion battery
Lithium vanadium phosphate
Magnesium

Access to Document

10.1016/j.jpowsour.2010.02.081

Cite this

@article{76a7954cdc6248b38536c81645b9ebfd,

title = "Synthesis and performance of Li3(V1-xMgx)2(PO4)3 cathode materials",

abstract = "In order to search for cathode materials with better performance, Li3(V1-xMgx)2(PO4)3 (0, 0.04, 0.07, 0.10 and 0.13) is prepared via a carbothermal reduction (CTR) process with LiOH·H2O, V2O5, Mg(CH3COO)2·4H2O, NH4H2PO4, and sucrose as raw materials and investigated by X-ray diffraction (XRD), scanning electron microscopic (SEM) and electrochemical impedance spectrum (EIS). XRD shows that Li3(V1-xMgx)2(PO4)3 (x = 0.04, 0.07, 0.10 and 0.13) has the same monoclinic structure as undoped Li3V2(PO4)3 while the particle size of Li3(V1-xMgx)2(PO4)3 is smaller than that of Li3V2(PO4)3 according to SEM images. EIS reveals that the charge transfer resistance of as-prepared materials is reduced and its reversibility is enhanced proved by the cyclic votammograms. The Mg2+-doped Li3V2(PO4)3 has a better high rate discharge performance. At a discharge rate of 20 C, the discharge capacity of Li3(V0.9Mg0.1)2(PO4)3 is 107 mAh g-1 and the capacity retention is 98\% after 80 cycles. Li3(V0.9Mg0.1)2(PO4)3//graphite full cells (085580-type) have good discharge performance and the modified cathode material has very good compatibility with graphite.",

keywords = "Carbothermal reduction method, Cathode material, Doping, Lithium ion battery, Lithium vanadium phosphate, Magnesium",

author = "Changsong Dai and Zhenyu Chen and Haizu Jin and Xinguo Hu",

year = "2010",

month = sep,

day = "1",

doi = "10.1016/j.jpowsour.2010.02.081",

language = "英语",

volume = "195",

pages = "5775--5779",

journal = "Journal of Power Sources",

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TY - JOUR

T1 - Synthesis and performance of Li3(V1-xMgx)2(PO4)3 cathode materials

AU - Dai, Changsong

AU - Chen, Zhenyu

AU - Jin, Haizu

AU - Hu, Xinguo

PY - 2010/9/1

Y1 - 2010/9/1

N2 - In order to search for cathode materials with better performance, Li3(V1-xMgx)2(PO4)3 (0, 0.04, 0.07, 0.10 and 0.13) is prepared via a carbothermal reduction (CTR) process with LiOH·H2O, V2O5, Mg(CH3COO)2·4H2O, NH4H2PO4, and sucrose as raw materials and investigated by X-ray diffraction (XRD), scanning electron microscopic (SEM) and electrochemical impedance spectrum (EIS). XRD shows that Li3(V1-xMgx)2(PO4)3 (x = 0.04, 0.07, 0.10 and 0.13) has the same monoclinic structure as undoped Li3V2(PO4)3 while the particle size of Li3(V1-xMgx)2(PO4)3 is smaller than that of Li3V2(PO4)3 according to SEM images. EIS reveals that the charge transfer resistance of as-prepared materials is reduced and its reversibility is enhanced proved by the cyclic votammograms. The Mg2+-doped Li3V2(PO4)3 has a better high rate discharge performance. At a discharge rate of 20 C, the discharge capacity of Li3(V0.9Mg0.1)2(PO4)3 is 107 mAh g-1 and the capacity retention is 98% after 80 cycles. Li3(V0.9Mg0.1)2(PO4)3//graphite full cells (085580-type) have good discharge performance and the modified cathode material has very good compatibility with graphite.

AB - In order to search for cathode materials with better performance, Li3(V1-xMgx)2(PO4)3 (0, 0.04, 0.07, 0.10 and 0.13) is prepared via a carbothermal reduction (CTR) process with LiOH·H2O, V2O5, Mg(CH3COO)2·4H2O, NH4H2PO4, and sucrose as raw materials and investigated by X-ray diffraction (XRD), scanning electron microscopic (SEM) and electrochemical impedance spectrum (EIS). XRD shows that Li3(V1-xMgx)2(PO4)3 (x = 0.04, 0.07, 0.10 and 0.13) has the same monoclinic structure as undoped Li3V2(PO4)3 while the particle size of Li3(V1-xMgx)2(PO4)3 is smaller than that of Li3V2(PO4)3 according to SEM images. EIS reveals that the charge transfer resistance of as-prepared materials is reduced and its reversibility is enhanced proved by the cyclic votammograms. The Mg2+-doped Li3V2(PO4)3 has a better high rate discharge performance. At a discharge rate of 20 C, the discharge capacity of Li3(V0.9Mg0.1)2(PO4)3 is 107 mAh g-1 and the capacity retention is 98% after 80 cycles. Li3(V0.9Mg0.1)2(PO4)3//graphite full cells (085580-type) have good discharge performance and the modified cathode material has very good compatibility with graphite.

KW - Carbothermal reduction method

KW - Cathode material

KW - Doping

KW - Lithium ion battery

KW - Lithium vanadium phosphate

KW - Magnesium

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DO - 10.1016/j.jpowsour.2010.02.081

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JO - Journal of Power Sources

JF - Journal of Power Sources

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