一维磷酸锑纳米纤维的制备及其电化学性能研究

Preparation of one-dimensional antimony phosphate nanofibers and their electrochemical properties

摘要:

为了改善磷酸锑作为钠离子电池负极材料的电化学性能，利用静电纺丝技术巧妙地将纳米化、纳米结构设计结合在一起，在空气气氛中经热处理合成了一种一维磷酸锑纳米纤维（SbPO₄@NFs）．实验结果表明：SbPO₄@NFs作为钠离子电池负极材料，在500 mA/g电流密度下循环100圈后可逆比容量依然有300 mA·h/g；在5 A/g大电流密度下可逆比容量仍然保持有242 mA·h/g， 1 A/g电流密度下循环300圈后可逆容量为126 mA·h/g．SbPO₄@NFs复合材料的优越电化学性能表明，其具有很好的实际应用前景．

Abstract:

In order to improve the electrochemical performance of antimony phosphate as anode material for sodium ion batteries， this paper cleverly combines nanosizing and nanostructure design using electrospinning technology. An one-dimensional antimony phosphate nanofiber （SbPO₄@NFs） was heat treated and synthesized in air by a simple electrospinning method. SbPO₄@NFs as an anode material for sodium ion batteries still had a reversible specific capacity of 300 mA·h/g after 100 cycles at 500 mA/g. More importantly， the reversible specific capacity remains 242 mA·h/g at a high current density of 5 A/g. It is worth mentioning that the reversible capacity after 300 cycles at a current density of 1 A/g is 126 mA·h/g. The superior electrochemical properties indicate that this SbPO₄@NFs composite has good prospects for practical applications.