Synthesis of Sn-Sb-Cu-Fe-Zn High-Etropy Alloy/Carbon Nanofiber Composite Anode Material by Electrospinning
Sn-Sb-Cu-Fe-Zn high-entropy alloy nanoparticles were uniformly anchored on conductive interconnected carbon nanofibers by electrospinning in combination with calcination process,and a composite anode material of SnSbCuFeZn@CNFs for lithium-ion batteries was successfully synthesized.Research shows that calcination temperature has an important influence on the phase composition and morphology characteristics of the synthesized material,and directly affects the crystal phase,size and distribution of Sn-Sb-Cu-Fe-Zn high-entropy alloy nanoparticles,also determines the electrochemical performance of SnSbCuFeZn@CNFs electrode.In the studied samples,the SnSbCuFeZn@CNFs-900 electrode can present excellent comprehensive performance:it delivers an initial specific discharge capacity of 1 232.8 mA/g at 0.1 A/g,and has reversible specific discharge capacity retaining at 786.0 mA/g after 200 cycles;it delivers a specific discharge capacity of 433.8 mA/g after 500 cycles at 1.0 A/g;it is found that the pseudo-capacitance accounts for as high as 93.37％at a scanning speed of 2.0 mV/s.
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