A comparative structural and electrochemical study of monoclinic Li3V2(PO4)3/C and rhombohedral Li2.5Na0.5V2(PO4)3/C

Wen Hui Wang; Zhen Yu Chen; Chang Song Dai; Da Long Ji; Jia Jie Li; Jie Wei

A comparative structural and electrochemical study of monoclinic Li₃V₂(PO₄)₃/C and rhombohedral Li_2.5Na_0.5V₂(PO₄)₃/C

Wen Hui Wang
, Zhen Yu Chen
, Chang Song Dai^*
, Da Long Ji
, Jia Jie Li
, Jie Wei

^*Corresponding author for this work

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

5 Scopus citations

Abstract

A lithium-ion battery cathode material, Li_2.5Na_0.5V₂(PO₄)₃/C, was prepared by the sol-gel method and characterized by X-ray diffraction (XRD), cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). As a control, Li₃V₂(PO₄)₃/C (LVP/C) was also prepared and studied. The effect of sodium-ion doping on the structure and electrochemical properties was studied. The XRD pattern of Li_2.5Na_0.5V₂(PO₄)₃/C indicates that the monoclinic structure of Li_3-xNa_xV₂(PO₄)₃ has transformed into a rhombohedral structure because of large amount of sodium-ion doping. For Li_2.5Na_0.5V₂(PO₄)₃/C, a specific discharge capacity of 118 mAh · g^-1 is achieved at a 0.5 C charge rate and 1 C discharge rate, and a 92.4% retention rate of the initial capacity is obtained after 50 cycles. Different from monoclinic LVP, there is only one discharge plateau at 3.7 V in the charge/discharge voltage profile of Li_2.5Na_0.5V₂(PO₄)₃/C.

Original language	English
Pages (from-to)	1070-1074
Number of pages	5
Journal	Chinese Journal of Inorganic Chemistry
Volume	28
Issue number	5
State	Published - May 2012
Externally published	Yes

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SDG 7 Affordable and Clean Energy

Keywords

Cathode material
Crystal structure
Lithium vanadium phosphate
Lithium-ion battery
Na-doping
Sol-gel preparation

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@article{b616722dda2e436f96d1766bf021b443,

title = "A comparative structural and electrochemical study of monoclinic Li3V2(PO4)3/C and rhombohedral Li2.5Na0.5V2(PO4)3/C",

abstract = "A lithium-ion battery cathode material, Li2.5Na0.5V2(PO4)3/C, was prepared by the sol-gel method and characterized by X-ray diffraction (XRD), cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). As a control, Li3V2(PO4)3/C (LVP/C) was also prepared and studied. The effect of sodium-ion doping on the structure and electrochemical properties was studied. The XRD pattern of Li2.5Na0.5V2(PO4)3/C indicates that the monoclinic structure of Li3-xNaxV2(PO4)3 has transformed into a rhombohedral structure because of large amount of sodium-ion doping. For Li2.5Na0.5V2(PO4)3/C, a specific discharge capacity of 118 mAh · g-1 is achieved at a 0.5 C charge rate and 1 C discharge rate, and a 92.4\% retention rate of the initial capacity is obtained after 50 cycles. Different from monoclinic LVP, there is only one discharge plateau at 3.7 V in the charge/discharge voltage profile of Li2.5Na0.5V2(PO4)3/C.",

keywords = "Cathode material, Crystal structure, Lithium vanadium phosphate, Lithium-ion battery, Na-doping, Sol-gel preparation",

author = "Wang, \{Wen Hui\} and Chen, \{Zhen Yu\} and Dai, \{Chang Song\} and Ji, \{Da Long\} and Li, \{Jia Jie\} and Jie Wei",

year = "2012",

month = may,

language = "英语",

volume = "28",

pages = "1070--1074",

journal = "Chinese Journal of Inorganic Chemistry",

issn = "1001-4861",

publisher = "Chinese Chemical Society",

number = "5",

}

TY - JOUR

T1 - A comparative structural and electrochemical study of monoclinic Li3V2(PO4)3/C and rhombohedral Li2.5Na0.5V2(PO4)3/C

AU - Wang, Wen Hui

AU - Chen, Zhen Yu

AU - Dai, Chang Song

AU - Ji, Da Long

AU - Li, Jia Jie

AU - Wei, Jie

PY - 2012/5

Y1 - 2012/5

N2 - A lithium-ion battery cathode material, Li2.5Na0.5V2(PO4)3/C, was prepared by the sol-gel method and characterized by X-ray diffraction (XRD), cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). As a control, Li3V2(PO4)3/C (LVP/C) was also prepared and studied. The effect of sodium-ion doping on the structure and electrochemical properties was studied. The XRD pattern of Li2.5Na0.5V2(PO4)3/C indicates that the monoclinic structure of Li3-xNaxV2(PO4)3 has transformed into a rhombohedral structure because of large amount of sodium-ion doping. For Li2.5Na0.5V2(PO4)3/C, a specific discharge capacity of 118 mAh · g-1 is achieved at a 0.5 C charge rate and 1 C discharge rate, and a 92.4% retention rate of the initial capacity is obtained after 50 cycles. Different from monoclinic LVP, there is only one discharge plateau at 3.7 V in the charge/discharge voltage profile of Li2.5Na0.5V2(PO4)3/C.

AB - A lithium-ion battery cathode material, Li2.5Na0.5V2(PO4)3/C, was prepared by the sol-gel method and characterized by X-ray diffraction (XRD), cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). As a control, Li3V2(PO4)3/C (LVP/C) was also prepared and studied. The effect of sodium-ion doping on the structure and electrochemical properties was studied. The XRD pattern of Li2.5Na0.5V2(PO4)3/C indicates that the monoclinic structure of Li3-xNaxV2(PO4)3 has transformed into a rhombohedral structure because of large amount of sodium-ion doping. For Li2.5Na0.5V2(PO4)3/C, a specific discharge capacity of 118 mAh · g-1 is achieved at a 0.5 C charge rate and 1 C discharge rate, and a 92.4% retention rate of the initial capacity is obtained after 50 cycles. Different from monoclinic LVP, there is only one discharge plateau at 3.7 V in the charge/discharge voltage profile of Li2.5Na0.5V2(PO4)3/C.

KW - Cathode material

KW - Crystal structure

KW - Lithium vanadium phosphate

KW - Lithium-ion battery

KW - Na-doping

KW - Sol-gel preparation

UR - https://www.scopus.com/pages/publications/84860609069

M3 - 文章

AN - SCOPUS:84860609069

SN - 1001-4861

VL - 28

SP - 1070

EP - 1074

JO - Chinese Journal of Inorganic Chemistry

JF - Chinese Journal of Inorganic Chemistry

IS - 5

ER -

A comparative structural and electrochemical study of monoclinic Li₃V₂(PO₄)₃/C and rhombohedral Li_2.5Na_0.5V₂(PO₄)₃/C

Abstract

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Keywords

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