TY - JOUR
T1 - One-step fabrication of silver nanosphere-wetted carbon nanotube electrodes
T2 - Via electric-field-driven combustion waves for high-performance flexible supercapacitors
AU - Yeo, Taehan
AU - Lee, Jaeho
AU - Shin, Dongjoon
AU - Park, Seonghyun
AU - Hwang, Hayoung
AU - Choi, Wonjoon
N1 - Funding Information:
This work was supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) and the Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea (Grant no. 20173010032170) and the Basic Science Research Program through the National Research Foundation of Korea (NRF), which is funded by the Ministry of Education (NRF-2018R1D1A1B07049086).
Publisher Copyright:
© 2019 The Royal Society of Chemistry.
PY - 2019
Y1 - 2019
N2 - Hybrids of micro/nanostructured metals/metal oxides and carbon-based materials are promising candidates for electrochemical electrodes. However, their fabrication requires complex procedures involving the interfaces and grain boundaries between constituent materials that degrade the overall performances. Herein, we report one-step electric-field driven combustion waves to fabricate the completely wetted hybrids of single-crystalline, spherical silver micro/nanoparticles and carbon nanotube webs, thereby significantly improving the contact interfaces and reducing the grain boundaries. The electric fields across the layered films of nitrocellulose, silver oxide nanoparticles and carbon nanotubes enable the combustion waves of ultrafast heating-cooling which facilitates the relocation of reduced and liquefied silver along the fiber-like networks and formation of single-crystalline silver particles, while the carbon nanotubes were mostly preserved without oxidization. These hybrids exhibited outstanding specific capacitance (1083 F g-1) and capacitance retention (95% after 10000 cycles) as supercapacitor electrodes. Furthermore, the symmetric/solid-state/flexible supercapacitors using the electrodes showed remarkable electrochemical performances (458 F g-1, 100% after 10000 cycles) and stability under harsh mechanical strains, such as bending and twisting (∼97%). This fabrication strategy enables scalable synthesis processes for functional hybrids having unique interfacial and grain boundaries.
AB - Hybrids of micro/nanostructured metals/metal oxides and carbon-based materials are promising candidates for electrochemical electrodes. However, their fabrication requires complex procedures involving the interfaces and grain boundaries between constituent materials that degrade the overall performances. Herein, we report one-step electric-field driven combustion waves to fabricate the completely wetted hybrids of single-crystalline, spherical silver micro/nanoparticles and carbon nanotube webs, thereby significantly improving the contact interfaces and reducing the grain boundaries. The electric fields across the layered films of nitrocellulose, silver oxide nanoparticles and carbon nanotubes enable the combustion waves of ultrafast heating-cooling which facilitates the relocation of reduced and liquefied silver along the fiber-like networks and formation of single-crystalline silver particles, while the carbon nanotubes were mostly preserved without oxidization. These hybrids exhibited outstanding specific capacitance (1083 F g-1) and capacitance retention (95% after 10000 cycles) as supercapacitor electrodes. Furthermore, the symmetric/solid-state/flexible supercapacitors using the electrodes showed remarkable electrochemical performances (458 F g-1, 100% after 10000 cycles) and stability under harsh mechanical strains, such as bending and twisting (∼97%). This fabrication strategy enables scalable synthesis processes for functional hybrids having unique interfacial and grain boundaries.
UR - http://www.scopus.com/inward/record.url?scp=85064227796&partnerID=8YFLogxK
U2 - 10.1039/c9ta00992b
DO - 10.1039/c9ta00992b
M3 - Article
AN - SCOPUS:85064227796
VL - 7
SP - 9004
EP - 9018
JO - Journal of Materials Chemistry A
JF - Journal of Materials Chemistry A
SN - 2050-7488
IS - 15
ER -