Yarn-ball-shaped P2-Na2/3Fe1/2Mn1/2O2 nanofibers prepared by magnetic-assisted electrospinning method as high-performance cathode material for Na-ion batteries
Yarn-ball-shaped P2-Na2/3Fe1/2Mn1/2O2 nanofibers prepared by magnetic-assisted electrospinning method as high-performance cathode material for Na-ion batteries
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磁辅助静电纺丝法制备纱球状P2-Na2/3Fe1/2Mn1/2O2纳米纤维作为高性能钠离子电池正极材料
DOI：
10.1016/j.matlet.2019.07.001
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发表时间：
2019-11-01
影响因子：
3
通讯作者：
Zhong, Shengkui
中科院分区：
文献类型：
--
作者：
Guan, Miao;Chen, Jiabin;Zhong, Shengkui
采用磁辅助静电纺丝法合成了绒球状P2-Na 2/3Fe 1/2 Mn 1/2 O2正极材料。基于静电纺丝方法，执行电磁场以保持纳米纤维旋转以形成纱线球状结构。XRD结果表明，样品为结晶良好的P2型Na 2/3Fe 1/2 Mn 1/2 O2相。SEM结果表明，球的直径约为10-50 μ m，球由直径为200-400 nm的纳米纤维组成。这种特殊的结构有利于提高Na+的扩散速度和材料的振实密度。电化学测试表明，该材料在0.1C倍率下的放电比容量为218.6mAh g（1），具有良好的倍率性能和循环性能。(C)2019爱思唯尔B. V.保留所有权利。
Yarn-ball-shaped P2-Na2/3Fe1/2Mn1/2O2 nanofiber cathode material is synthesized by a magnetic-assisted electrospinning method. Based on the electrospinning method, an electromagnetic-field is performed to keep the nanofibers rotating to form the yarn-ball-like architecture. XRD result indicates that the sample is a pure P2-type Na2/3Fe1/2Mn1/2O2 phase with good crystallization. SEM results show that the diameter of the balls is about 10-50 mu m, and the balls are composed of nanofibers with a diameter of 200-400 nm. This special architecture is beneficial to increase the Na+ diffusion speed and tap-density of nanofiber material. Electrochemical tests show that the sample has a high discharge specific capacity of 218.6 mAh g(1) at 0.1 C rate, and exhibits good rate capability and excellent cycling performance. (C) 2019 Elsevier B.V. All rights reserved.