Synthesis and characterization of LiVOPO4/V2O5 composite cathode for lithium ion batteries

被引：6

作者：

Fu, Yangyang ^{[1
]}

Tang, Anping ^{[1
,2
,3
]}

Chen, Hezhang ^{[1
]}

Xu, Guorong ^{[1
]}

Song, Haishen ^{[1
]}

Peng, Ronghua ^{[1
]}

机构：

[1] Hunan Univ Sci & Technol, Sch Chem & Chem Engn, Xiangtan 411201, Peoples R China

[2] Hunan Prov Key Lab Adv Mat New Energy Storage & C, Xiangtan 411201, Peoples R China

[3] Hunan Univ Sci & Technol, Key Lab Theoret Chem & Mol Simulat, Minist Educ, Xiangtan 411201, Peoples R China

来源：

IONICS | 2020年 / 26卷 / 04期

关键词：

LiVOPO4; Cathode; Lithium ion batteries; Modification with V2O5; ELECTROCHEMICAL PERFORMANCE; BETA-LIVOPO4;

D O I：

10.1007/s11581-020-03499-4

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

LiVOPO4/V2O5 composites were prepared by a hydrothermal oxidation route and subsequent heat-treatment. The existence of V2O5 in the composites was confirmed using X-ray diffraction. The morphologies of the samples were observed by scanning electron microscopy. The effects of V2O5 content on the electrochemical properties of the composites were investigated by galvanostatic charge-discharge tests and electrochemical impedance spectroscopy. X-ray diffraction revealed that modification with V2O5 did not change LiVOPO4 crystal structure. V2O5-modified LiVOPO4 composites displayed improved discharge specific capacities in comparison with the pristine LiVOPO4 sample. Among the investigated composites, the one with 15 wt% V2O5 showed the best electrochemical performance, which might be contributed to a significant decrease in the interfacial resistance by modification with V2O5.

引用

页码：1629 / 1634

页数：6

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