材料科学
退火(玻璃)
纳米结构
阴极
化学工程
纳米晶
多孔性
热液循环
钠
纳米-
微波食品加热
纳米技术
离子
复合材料
冶金
物理化学
化学
工程类
物理
量子力学
作者
Yujia Mao,Xiong Zhang,Yanping Zhou,Wei Chu
标识
DOI:10.1016/j.scriptamat.2020.02.023
摘要
Na3V2(PO4)2F3 is a prospective cathode material for sodium ion batteries (SIBs) because of its high theoretical capacity. Nevertheless, its low electronic conductivity leads to poor cycling and rate performance, hindering its practical application. In this work, ultrafine-Na3V2(PO4)2F3 nanocrystals less than 20 nm embedded in porous carbon nanospheres are fabricated via a microwave-assisted glycerol-mediated hydrothermal process followed by annealing. Microwave irradiation is shown to be critical for the formation of homogenous ultrafine nanostructure. The product exhibits a charge/discharge capacity of 106 mAh g−1 at 0.5 C after 100 cycles with a retention of approximate 100% as cathode material for SIBs.
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