Multi-core–shell-structured LiFePO4@Na3V2(PO4)3@C composite for enhanced low-temperature performance of lithium-ion batteries

In this work, a multi-core–shell-structured LiFePO 4 @Na 3 V 2 (PO 4 ) 3 @C (LFP@NVP@C) composite was successfully designed and prepared to address inferior low-temperature performance of LiFePO 4 cathode for lithium-ion batteries. Transmission electron microscopy (TEM) confirms the inner NVP and ou...

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Bibliographic Details
Published in:Rare metals 2021-04, Vol.40 (4), p.828-836
Main Authors: Gu, Xing-Xing, Qiao, Shuang, Ren, Xiao-Lei, Liu, Xing-Yan, He, You-Zhou, Liu, Xiao-Teng, Liu, Tie-Feng
Format: Article
Language:English
Subjects:
Biomaterials
Chemical reactions
Chemistry and Materials Science
Core-shell structure
Discharge
Electrochemical analysis
Electrode polarization
Energy
Lithium
Lithium-ion batteries
Low temperature
Materials Engineering
Materials Science
Metallic Materials
Nanoscale Science and Technology
Original Article
Physical Chemistry
Rechargeable batteries
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Summary:In this work, a multi-core–shell-structured LiFePO 4 @Na 3 V 2 (PO 4 ) 3 @C (LFP@NVP@C) composite was successfully designed and prepared to address inferior low-temperature performance of LiFePO 4 cathode for lithium-ion batteries. Transmission electron microscopy (TEM) confirms the inner NVP and outer carbon layers co-existed on the surface of LFP particle. When evaluated at low-temperature operation, LFP@NVP@C composite exhibits an evidently enhanced electrochemical performance in term of higher capacity and lower polarization, compared with LFP@C. Even at − 10 °C with 0.5C, LFP@NVP@C delivers a discharge capacity of ca. 96.9 mAh·g −1 and discharge voltage of ca. 3.3 V, which is attributed to the beneficial contribution of NVP coating. NASICON-structured NVP with an open framework for readily insertion/desertion of Li + will effectively reduce the polarization for the electrochemical reactions of the designed LFP@NVP@C composite. Graphic abstract
ISSN:1001-0521
1867-7185
DOI:10.1007/s12598-020-01669-x