摘要
以无毒的红磷为原材料,采用化学还原和高能球磨法制备黑磷、P/SnSb/C钠离子电池负极材料,用XRD、SEM、恒流充放电和循环伏安等方法分析材料的物相结构、形貌及电化学性能。SnSb和导电炭黑的加入,改善了黑磷的导电性能,缓冲了体积膨胀效应,增加了结构稳定性。以100 m A/g在0.01~2.50 V循环,P/SnSb/C首次放电比容量为777.37 mAh/g,首次库仑效率为82.8%,第50次循环的放电比容量为557.34 mAh/g,库仑效率达98.7%。
Black phosphorus and P/SnSb/C composite were synthesized based on the nontoxic red phosphorus via chemical reduction method and ball-milling method. XRD, SEM galvanostatic charge-discharge and cyclic voltammetry methods were employed to analyze the phase structure, morphology and electrochemical performance. Adding SnSb and conductive carbon black not only could improve electrical conductivity but also response the volumetric expansion of black phosphorus during the charge- discharge process, the structure stability of material was enhanced. When cycled in 0. 01 - 2. 50 V with 100 mA/g, the initial specific discharge capacity of P/SnSb/C composite was 777. 37 mAh/g with 82. 8% initial Coulombic efficiency, the specific discharge capacity was 557. 34 mAh/g in the 50th cycle, while its Conlombic efficiency was up to 98.7%.
出处
《电池》
CAS
CSCD
北大核心
2016年第4期185-188,共4页
Battery Bimonthly
基金
广东省科技计划项目(2016A050503040,2016B010114002)
广东省自然科学基金(2014A030313436)
华南师范大学研究生科研创新基金计划项目(2015lkxm34)
广州市科技计划项目(201607010274,201607010322)
关键词
钠离子电池
黑磷
Sn
SB
球磨法
sodium ion battery
black phosphorus
SnSb
ball-milling method
