摘要
本研究在铜箔基底上通过无模板恒流电沉积技术成功制备出三维柱阵列型纳米多孔铜镍集流体。采用恒压电沉积方式在该集流体表层沉积SnS纳米颗粒,形成了具有三维柱状结构的纳米多孔硫化亚锡电极。利用恒流充放电测试与XRD、SEM、EDS技术,综合评估了该负极的电化学特性、微观结构、化学元素分布及其物相成分。结果表明,所制备的纳米柱表面存在孔隙,阵列间隙均匀。在0.1 mA/cm^(2)电流密度下,该电极首次放/充电过程中分别提供了0.77/0.48 mAh/cm^(2)的面积比容量,首次库仑效率为62%。经过50周循环后,电极可逆比容量仍达0.30 mAh/cm^(2),容量保持率为62.5%。
3D pillar array nanoporous Cu-Ni current collectors were fabricated on a copper foil substrate using a template-free constant current electrodeposition method.Subsequently,SnS nanoparticles were deposited on its surface using constant voltage electrodeposition,resulting in 3D pillar array nanoporous SnS anodes.Systematic analyses of the phase composition,microstructure,elemental distribution,and electrochemical performance were conducted using XRD,SEM,EDS,and constant current charge-discharge testing.The results revealed that the fabricated nanopillars had a porous surface with uniform inter-array gaps.At a current density of 0.1 mA/cm^(2),the electrode initially delivered specific areal capacities of 0.77/0.48 mAh/cm^(2)for discharge/charge,with an initial Coulombic efficiency of 62%.After 50 cycles,the electrode maintained a reversible specific capacity of 0.30 mAh/cm^(2),with a capacity retention rate of 62.5%.
作者
王浩宇
刘文博
Wang Haoyu;Liu Wenbo(School of Mechanical Engineering,Sichuan University,Chengdu Sichuan 610065,China)
出处
《山西化工》
CAS
2024年第3期1-3,67,共4页
Shanxi Chemical Industry
基金
国家自然科学基金项目(52075351)。
关键词
锂离子电池
无模板法
电沉积
柱阵列结构
硫化亚锡
纳米多孔负极
lithium ion batteries
template-free method
electrodeposition
pillar array structure
SnS
nanoporous anode
