期刊
ACS APPLIED MATERIALS & INTERFACES
卷 13, 期 21, 页码 25036-25043出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c06160
关键词
Na3V2(PO4)(3); carbon-coating cycling life; sodium-ion battery; symmetric cell
资金
- NNSF of China [21601122, 51602193, 21905169]
- Shanghai Chenguang Project [16CG63]
- Belt and Road Initiatives International Cooperation Project [20640770300]
- NSF of Shandong Province [ZR2016BQ41]
- Shanghai Sailing Program [18YF1408600]
This work successfully fabricated carbon-decorated Na3V2(PO4)(3) materials, with NVP@C-800 showing excellent electrochemical performance such as ultralong cycle life at high rate and high energy density in a symmetric sodium-ion battery.
In this work, several carbon-decorated Na3V2(PO4)(3) materials (NVP@C-750/800/850) are successfully fabricated using a solgel approach and subsequent heat treatment. When NVP@C-800 is used as a cathode, it shows an ultralong cycle life (2000 cycles) at a high rate of 10C, which is superior to the other two electrodes and those of reported NVP@C cathodes in the literature. The excellent results of NVP@C-800 are attributed to its nanostructure and the well-defined conductive carbon layer. The symmetric sodium (Na)-ion battery (SIB) with NVP@C-800 as both a cathode and an anode shows a high capacity at 40 mA g(-1) with a voltage plateau of about 1.79 V and energy density of 113 W h kg(-1), revealing that NVP@C is of great application prospect.
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