期刊
CERAMICS INTERNATIONAL
卷 44, 期 15, 页码 17577-17584出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2018.06.236
关键词
Na-ion batteries; Cathode materials; Na2MnPO4F; Electrospinning; Nanoflbers
资金
- National Natural Science Foundation of China [51574170, 51774207, 51774210]
- Qing Lan Project of Jiangsu Province, China (2017)
Three-dimensional carbon nanofibers embedded with Na2MnPO4F nanoparticles are fabricated via electrospinning method and investigated as cathode material for sodium ion batteries. The Na2MnPO4F nanoparticles with a size of about 10-30 nm are well-crystallized and the diameter of the carbon nanofibers are about 100 nm. Due to the ultrafine particle size of Na2MnPO4F together with high conductivity of the three-dimensional electron/ion hybrid network of carbon nanofibers, the material synthesized at 650 degrees C exhibit good electrochemical performance at room temperature. It is found that an obvious potential platform as high as 3.6 V during charge/discharge processes occurs and there is an initial specific capacity of 122.4 mAh g(-1) at 0.05C rate, which is close to the theoretic capacity (one Na extracted) of Na2MnPO4F. This work suggests a new design strategy for high-performance Na2MnPO4F cathodes of sodium-ion batteries.
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