期刊
NANO ENERGY
卷 56, 期 -, 页码 160-168出版社
ELSEVIER
DOI: 10.1016/j.nanoen.2018.11.011
关键词
Na4Fe3(PO4)(2)P2O7; rGO; Low cost; Cathode; Sodium-ion battery
类别
资金
- National Key Basic Research Program of China [2016YFB0901500]
- National Natural Science Foundation of China [21673165, 21875171, 21333007, JCKY2016130B010]
- Fundamental Research Funds for the Central Universities [2042018kf0007]
Sodium-ion battery has emerged as one of most promising technologies for large-scale energy storage system, and hence has stimulated extensive exploration of applicable electrode materials with low cost and superb electrochemical properties. Herein, 3D graphene decorated Na4Fe3(PO4)(2)(P2O7) microspheres as a low-cost and environmentally friendly cathode material are synthesized by using a facile spray-drying method. The as-prepared NFPP@rGO composite exhibits a high reversible capacity of 128 mAh g(-1) at 0.1 C, a superior rate capability (35 mAh g(-1) at 200 C), and a long cycling life (62.3% capacity retention over 6000 cycles at 10 C). The excellent electrochemical performance is attributed to combined advantages of graphene coating on the surface of nanoparticles and the flexible 3D graphene network, which not only improve the electronic conductivity, but also accommodate the structural stress of the material during charging and discharging. Therefore, the NFPP@rGO microsphere with superior electrochemical performances, low-cost raw materials, simple synthetic route and high thermal stability is considered as a very attractive cathode electrode for sodium ion battery.
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