期刊
JOURNAL OF POWER SOURCES
卷 490, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2021.229518
关键词
Supercapacitor; Activated carbon; Seawater electrolyte; Supercapacitor module
资金
- Creative Materials Discovery Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT and Future [NRF2015M3D1A1069710]
- National Research Foundation of Korea (NRF) - Ministry of Education, Republic of Korea [NRF-2014R1A6A1030419]
- National Research Foundation of Korea [5120200913726] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
In this study, a supercapacitor utilizing activated carbon from cornhusk and seawater as the electrolyte was designed, with the Ti-based electrode showing the best electrochemical performance and stability. The supercapacitor exhibited high specific capacitance, energy density, and stability in seawater electrolyte.
Renewable and sustainable energy sources are essential for modern society especially for the energy storage device owing to the usage of nonrenewable resources and considering the cost of the raw materials. In this work, we design a supercapacitor utilizing activated carbon from the agricultural waste cornhusk (CHAC) as an electrode material and seawater as the electrolyte. Moreover, the supercapacitor is assembled and test employing different substrates such as stainless steel, nickel foam, carbon cloth and titanium. Among them, the Ti-based electrode exhibits comparable electrochemical performances and high stability in the seawater electrolyte than the stainless steel (SS)-based and other electrodes. The supercapacitor with CHAC deposit on Ti substrate shows considerable specific capacitance value (130 F g(-1)), better energy density (7.74 W h kg(-1)) and stability similar to 98% for 10000 cycles in an optimize electrolyte concentration (seawater). Furthermore, a laboratory-scale portable supercapacitor module demonstrates considerable electrochemical performances and also the retainability of the device can maintain by recharging fresh electrolyte after several charging/discharging cycles.
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