Shape Effect on Electrochemical Energy Storage Performance of Nanosized Copper Germanium Selenide Particles

摘要

Colloidal Cu2GeSe3 nanosheets(NSs)(0.5-1.5 urn)and Cu2GeSe3 nanoparticles(NPs)(8-10 nm)were synthesized for electrochemical performance comparison.The galvanostatic measurements show the maximum capacitance of 118 F/g and 77 F/g for Cu2GeSe3 NSs and NPs,respectively.Each type of nanomaterials exhibits shape dependence in its capacitance reduction behavior with increasing current density due to differences in surface area and electrical conductivity.The cyclic stability tests for Cu2GeSe3 NSs showed a capacity retention of about 90% after 1000 cycles.