期刊
DALTON TRANSACTIONS
卷 46, 期 20, 页码 6601-6611出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7dt00953d
关键词
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资金
- Global Frontier Program through the Global Frontier Hybrid Interface Materials (GFHIM) of the National Research Foundation of Korea (NRF) - Ministry of Science, ICT & Future Planning [2013 M3A6B1078874]
- National Research Foundation of Korea [2013M3A6B1078874] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The present study involves the synthesis of a bismuth oxide (Bi2O3) electrode consisting of an arranged nano-platelets for evolving a flower-type surface appearance on nickel-foam (Bi2O3-Ni-F) by a simple, inexpensive, binder-free and one-step chemical bath deposition (CBD) method, popularly known as a wet chemical method. The as-prepared Bi2O3 on Ni-foam, as an electrode material, demonstrates 557 F g(-1) specific capacitance (SC, at 1 mA cm(-2)), of which 85% is retained even after 2000 cycles. With specific power density of 500 kW kg(-1), the Bi2O3-Ni-F electrode documents a specific energy density of 80 Wh kg(-1). Furthermore, a portable asymmetric supercapacitor device, i.e. a pencil-type cell consisting of Bi2O3-Ni-F as an anode and graphite as a cathode in 6 M KOH aqueous electrolyte solution, confirms 11 Wh kg(-1) and 720 kW kg(-1) specific energy and specific power densities, respectively. An easy and a simple synthesis approach for manufacturing a portable laboratory scale pencil-type supercapacitor device is a major outcome of this study, which can also be applied for ternary and quaternary metal oxides for recording an enhanced performance. In addition, we presented a demonstration of lighting a light emitting diode (LED) using a home-made pencil-type supercapacitor device which, finally, has confirmed the scaling and technical potentiality of Bi2O3-Ni-F in energy storage devices.
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