期刊
CHINESE CHEMICAL LETTERS
卷 32, 期 11, 页码 3570-3574出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.cclet.2021.03.005
关键词
Sodium-ion batteries; NASICON; Na3V2(PO4)(3); Cathode; Carbon-coated
资金
- National Natural Science Foundation of China [51774251]
- Shanghai Science and Technology Commission's 2020 Science and Technology Innovation Action Plan [20511104003]
- Hebei Natural Science Foundation for Distinguished Young Scholars [B2017203313]
- Hundred Excellent Innovative Talents Support Program in Hebei Province [SLRC2017057]
- Talent Engineering Training Funds of Hebei Province [A201802001]
- Opening Project of the State Key Laboratory of Advanced Chemical Power Sources [SKL-ACPS-C-11]
Na3V2(PO4)(3) is a promising electrode material for sodium-ion batteries, but faces limitations due to poor electronic conductivity. A two-step method was used to prepare carbon-coated Na3V2(PO4)(3) materials with remarkable electrochemical performance, surpassing most advanced cathode materials reported in literature.
Na3V2(PO4)(3) is a very prospective sodium-ion batteries (SIBs) electrode material owing to its NASICON structure and high reversible capacity. Conversely, on account of its intrinsic poor electronic conductivity, Na3V2(PO4)(3) electrode materials confront with some significant limitations like poor cycle and rate performance which inhibit their practical applications in the energy fields. Herein, a simple two-step method has been implemented for the successful preparation of carbon-coated Na3V2(PO4)(3) materials. As synthesized sample shows a remarkable electrochemical performance of 124.1 mAh/g at 0.1 C (1 C = 117.6 mA/g), retaining 78.5 mAh/g under a high rate of 200 C and a long cycle-performance (retaining 80.7 mAh/g even after 10000 cycles at 20 C), outperforming the most advanced cathode materials as reported in literatures. (C) 2021 Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences. Published by Elsevier B.V. All rights reserved.
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