Li3V2(PO4)3/LiFePO4 composite hollow microspheres for wide voltage lithium ion batteries

He, Wen, Wei, Chuanliang, Zhang, Xudong, Wang, Yaoyao, Liu, Qinze, Shen, Jianxing, Wang, Lianzhou and Yue, Yuanzheng (2016) Li3V2(PO4)3/LiFePO4 composite hollow microspheres for wide voltage lithium ion batteries. Electrochimica Acta, 219 682-692. doi:10.1016/j.electacta.2016.10.047


Author He, Wen
Wei, Chuanliang
Zhang, Xudong
Wang, Yaoyao
Liu, Qinze
Shen, Jianxing
Wang, Lianzhou
Yue, Yuanzheng
Title Li3V2(PO4)3/LiFePO4 composite hollow microspheres for wide voltage lithium ion batteries
Formatted title
Li3V2(PO4)3/LiFePO4 composite hollow microspheres for wide voltage lithium ion batteries
Journal name Electrochimica Acta   Check publisher's open access policy
ISSN 0013-4686
1873-3859
Publication date 2016-11-20
Sub-type Article (original research)
DOI 10.1016/j.electacta.2016.10.047
Open Access Status Not yet assessed
Volume 219
Start page 682
End page 692
Total pages 11
Place of publication Kidlington, Oxford, United Kingdom
Publisher Pergamon Press
Language eng
Formatted abstract
Li3V2(PO4)3 (LVP)/LiFePO4 (LVP) composite hollow microspheres (LVP/LFP-CHMs) for lithium-ion batteries have been synthesized by a combination method, using yeast cells as both structure templates and biocarbon source. The stable heterogeneous isomorphism solid solution with superlattice structure is formed in the joint of LVP and LFP particles. A detailed analysis of the formation mechanism of solid solution with superlattice structure and the influences of different Fe:V mole ratios on the structure and electrochemical properties of composites are presented. When the LVP/LFP-CHMs with a Fe:V mole ratio of 1:3 were used as cathode material in coin cells with metallic Li as anode, the cell exhibits a discharge capacity of 221.5 mAh g−1 for 5 cycles and discharge specific energy of 682 Wh kg−1 at 0.1C in a wide voltage range (1.5–4.3 V). Its capacity is far higher than the capacity of unsubstituted LFP and LVP in the same wide voltage range. The energy density of this cell is about 4 times higher than that of modern commercial lithium-ion batteries (157 Wh kg−1). The wide voltage range not only increases the discharge capacity and energy density of cathode materials, but also could expand the range of its applications in electronic equipment.
Keyword Cathode
Heterogeneous isomorphism
Lithium ion battery
Lithium iron phosphate
Lithium vanadium phosphate
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
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