Electrochemical Synthesis and Lithium Storage Performance Study of 3D Pillar Array Nanoporous SnS Anodes
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/cm2,the electrode initially delivered specific areal capacities of 0.77/0.48 mAh/cm2 for discharge/charge,with an initial Coulombic efficiency of 62%.After 50 cycles,the electrode maintained a reversible specific capacity of 0.30 mAh/cm2,with a capacity retention rate of 62.5%.
lithium ion batteriestemplate-free methodelectrodepositionpillar array structureSnSnanoporous anode
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