静电纺丝法制备SnSbCuFeZn高熵合金/碳纳米纤维复合负极材料  

Synthesis of Sn-Sb-Cu-Fe-Zn High-Etropy Alloy/Carbon Nanofiber Composite Anode Material by Electrospinning

作　　者：辛玉 潘石 聂淑晴 缪畅[1] 肖围[1] XIN Yu;PAN Shi;NIE Shuqing;MIAO Chang;XIAO Wei(College of Chemistry and Environmental Engineering,Yangtze University,Jingzhou 434023,Hubei,China)

机构地区：[1]长江大学化学与环境工程学院,湖北荆州434023

出　　处：《矿冶工程》2024年第4期61-66,共6页Mining and Metallurgical Engineering

基　　金：国家自然科学基金(52274292);湖北省自然科学基金杰青项目(2020CFA090);荆州市科技计划项目(2023EC37)。

摘　　要：采用静电纺丝技术,结合煅烧工艺,将SnSbCuFeZn高熵合金纳米颗粒均匀地锚定在导电互联的碳纳米纤维中,成功制备了SnSbCuFeZn@CNFs锂离子电池复合负极材料。结果表明,煅烧温度对材料的物相组成和形貌特征有重要影响,且直接影响SnSbCuFeZn高熵合金纳米颗粒的晶相、尺寸和分布,决定SnSbCuFeZn@CNFs电极的电化学性能。其中SnSbCuFeZn@CNFs-900电极展现出优良综合性能:0.1 A/g时,初始放电比容量达1232.8 mA/g,循环200次后可逆放电比容量保持在786.0 mA/g;1.0 A/g时,循环500次后放电比容量仍有433.8 mA/g;2.0 mV/s扫描速度下,赝电容贡献率高达93.37%。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 1232.8 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.

关 键 词：静电纺丝法 SnSbCuFeZn高熵合金 碳纳米纤维 负极材料 锂离子电池 

分 类 号：TM912[电气工程—电力电子与电力传动]