Open AccessThree‐dimensional nanoporous copper with tunable structure prepared by dealloying titanium–copper–cobalt metallic glasses for supercapacitors
Author(s) -
Yue Xiang,
Hu Rui,
Qi Jiqiu,
Sui Yanwei,
He Yezeng,
Meng Qingkun,
Wei Fuxiang,
Ren Yaojian,
Zhao Yulong
Publication year - 2020
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2019.0627
Subject(s) - nanoporous , materials science , copper , supercapacitor , electrolyte , titanium , potassium hydroxide , chemical engineering , capacitance , electrochemistry , amorphous solid , layer (electronics) , barrier layer , hydrofluoric acid , anodizing , cobalt , metal , inorganic chemistry , electrode , metallurgy , composite material , nanotechnology , crystallography , aluminium , chemistry , engineering
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 .