Abstract
Nanoporous Ni with a tunable nanopore size and chemical compositions was fabricated by dealloying a Ni30Mn70 precursor alloy at various temperatures. The influence of electrochemical parameters on the formation of large-scale nanoporous Ni was systematically investigated. Different from the fabrication of nanoporous noble metals (Au, Pt and Pd), the dealloying of Ni30Mn70 includes three kinetically competitive processes: dissolution of Mn, interface diffusion of Ni and dissolution of Ni. The nanopore size and residual Mn can be tailored by controlling the dealloying time, temperature and applied potential. The as-dealloyed nanoporous Ni with a large internal surface area, excellent conductivity and naturally formed oxide surface can be directly used as a free-standing electrode for electrochemical supercapacitors with a high capacitance and excellent cycling stability.
| Original language | English |
|---|---|
| Pages (from-to) | 896-905 |
| Number of pages | 10 |
| Journal | Journal of Power Sources |
| Volume | 247 |
| DOIs | |
| Publication status | Published - 2014 Jan 1 |
| Externally published | Yes |
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Keywords
- Dealloying
- Free-standing
- Nanoporous nickel
- Supercapacitor
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Energy Engineering and Power Technology
- Physical and Theoretical Chemistry
- Electrical and Electronic Engineering
Cite this
Fabrication of large-scale nanoporous nickel with a tunable pore size for energy storage. / Qiu, H. J.; Kang, J. L.; Liu, P.; Hirata, Akihiko; Fujita, T.; Chen, M. W.
In: Journal of Power Sources, Vol. 247, 01.01.2014, p. 896-905.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Fabrication of large-scale nanoporous nickel with a tunable pore size for energy storage
AU - Qiu, H. J.
AU - Kang, J. L.
AU - Liu, P.
AU - Hirata, Akihiko
AU - Fujita, T.
AU - Chen, M. W.
PY - 2014/1/1
Y1 - 2014/1/1
N2 - Nanoporous Ni with a tunable nanopore size and chemical compositions was fabricated by dealloying a Ni30Mn70 precursor alloy at various temperatures. The influence of electrochemical parameters on the formation of large-scale nanoporous Ni was systematically investigated. Different from the fabrication of nanoporous noble metals (Au, Pt and Pd), the dealloying of Ni30Mn70 includes three kinetically competitive processes: dissolution of Mn, interface diffusion of Ni and dissolution of Ni. The nanopore size and residual Mn can be tailored by controlling the dealloying time, temperature and applied potential. The as-dealloyed nanoporous Ni with a large internal surface area, excellent conductivity and naturally formed oxide surface can be directly used as a free-standing electrode for electrochemical supercapacitors with a high capacitance and excellent cycling stability.
AB - Nanoporous Ni with a tunable nanopore size and chemical compositions was fabricated by dealloying a Ni30Mn70 precursor alloy at various temperatures. The influence of electrochemical parameters on the formation of large-scale nanoporous Ni was systematically investigated. Different from the fabrication of nanoporous noble metals (Au, Pt and Pd), the dealloying of Ni30Mn70 includes three kinetically competitive processes: dissolution of Mn, interface diffusion of Ni and dissolution of Ni. The nanopore size and residual Mn can be tailored by controlling the dealloying time, temperature and applied potential. The as-dealloyed nanoporous Ni with a large internal surface area, excellent conductivity and naturally formed oxide surface can be directly used as a free-standing electrode for electrochemical supercapacitors with a high capacitance and excellent cycling stability.
KW - Dealloying
KW - Free-standing
KW - Nanoporous nickel
KW - Supercapacitor
UR - http://www.scopus.com/inward/record.url?scp=84885130085&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84885130085&partnerID=8YFLogxK
U2 - 10.1016/j.jpowsour.2013.08.070
DO - 10.1016/j.jpowsour.2013.08.070
M3 - Article
AN - SCOPUS:84885130085
VL - 247
SP - 896
EP - 905
JO - Journal of Power Sources
JF - Journal of Power Sources
SN - 0378-7753
ER -