Assembly of Na(3)V(2)(PO(4))(2)F(3)@C nanoparticles in reduced graphene oxide enabling superior Na(+) storage for symmetric sodium batteries.
Assembly of Na(3)V(2)(PO(4))(2)F(3)@C nanoparticles in reduced graphene oxide enabling superior Na(+) storage for symmetric sodium batteries.
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在还原氧化石墨烯中组装 Na3V2(PO4)2F3@C 纳米粒子,为对称钠电池提供卓越的钠存储
DOI:
10.1039/c7ra13441j
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发表时间:
2018-01-12
期刊:
影响因子:
3.9
通讯作者:
Du, Fei
中科院分区:
文献类型:
--
作者:
Yao, Ye;Zhang, Lu;Gao, Yu;Chen, Gang;Wang, Chunzhong;Du, Fei
Reduced graphene oxide (rGO) was used to encapsulate Na3V2(PO4)2F3@Carbon nanoparticles to overcome its inherent low electronic conductivity and achieve superior sodium storage performance. This as-prepared cathode delivers a remarkable rate performance with a discharge capacity of ca. 64 mA h g−1 at 70C and an ultra-long-term cyclability over 4000 cycles with great capacity retention of 81% at 30C. This excellent performance can be attributed to the favorable combination of fast ionic conductivity of the NASICON structure and the interpenetrating conductive carbon framework; thus bringing a good pseudocapacitive quality to this material. Furthermore, thanks to the good sodium storage properties at low potential, a symmetric full cell can be assembled using Na3V2(PO4)2F3@C@rGO as both cathode and anode. The full cell delivers a high discharge capacity of 53 mA h g−1 at 20C rate, further demonstrating the feasibility of this hybrid material for smart grids.
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