Three-dimensional nanoporous copper with tunable structure prepared by dealloying titanium–copper–cobalt metallic glasses for supercapacitors

Micro & nano letters

article

Xiang Yue¹  Rui Hu²  Jiqiu Qi¹  Yanwei Sui¹  Yezeng He¹  Qingkun Meng¹  Fuxiang Wei¹  Yaojian Ren¹  Yulong Zhao¹ 

[1] School of Materials Science and Engineering, China University of Mining and Technology;State Key Laboratory of Solidification Processing, Northwestern Polytechnical University

关键词: copper alloys;    metallic glasses;    current density;    nanofabrication;    electrolytes;    supercapacitors;    capacitance;    nanoporous materials;    electrochemical electrodes;    titanium alloys;    cobalt alloys;    glass structure;    amorphous state;    tunable structure;    three-dimensional bicontinuous nanoporous copper;    pore size;    dealloying titanium-copper-cobalt metallic glasses;    supercapacitors;    amorphous ribbons;    sandwich-like layered structure;    cross-section;    electrochemical properties;    specific capacitance;    current density;    electrolyte;    cycling stability;    capacitance retention;    time 30.0 min;    size 10.0 nm to 60.0 nm;    time 1.0 hour to 12.0 hour;    Ti-Cu-Co;   

DOI  :  10.1049/mnl.2019.0627

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

Three-dimensional bicontinuous nanoporous copper (NPC) with a pore size of 10–60 nm was fabricated by dealloying titanium–copper–cobalt amorphous ribbons in 0.23 M hydrofluoric acid (HF) solution for 1–12 h. It is found that dealloyed ribbons show sandwich-like layered structure in the cross-section and the pore size in the outer layer is larger than that in the core layer. The NPC ribbons, polarised in 1 M potassium hydroxide (KOH) solution for 30 min, delivered an excellent electrochemical performance with a specific capacitance of 202.3 mF/cm 2 at the current density of 5 mA/cm 2 in 1 M KOH electrolyte and good cycling stability of 90% capacitance retention after 5000 cycles at 20 mA/cm 2 .

【 授权许可】

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