1. Carbon–carbon asymmetric aqueous capacitor by pseudocapacitive positive and stable negative electrodes
- Author
-
Soshi Shiraishi, Hirotomo Nishihara, Takashi Kyotani, Khanin Nueangnoraj, Emilia Morallón, Diego Cazorla-Amorós, Ramiro Ruiz-Rosas, Universidad de Alicante. Departamento de Química Inorgánica, Universidad de Alicante. Departamento de Química Física, Universidad de Alicante. Instituto Universitario de Materiales, Materiales Carbonosos y Medio Ambiente, and Electrocatálisis y Electroquímica de Polímeros
- Subjects
Pseudocapacitive positive electrode ,Química Inorgánica ,Aqueous solution ,Materials science ,Reinforced carbon–carbon ,Nanotechnology ,Asymmetric aqueous capacitor ,General Chemistry ,Stable negative electrode ,KOH-activated carbon ,Zeolite-templated carbon ,law.invention ,Capacitor ,law ,Agency (sociology) ,Electrode ,General Materials Science ,Química Física ,Science, technology and society - Abstract
An asymmetric aqueous capacitor was constructed by employing zeolite-templated carbon (ZTC) as a pseudocapacitive positive electrode and KOH-activated carbon as a stable negative electrode. The asymmetric capacitor can be operated with the working voltage of 1.4 V, and exhibits an energy density that is comparable to those of conventional capacitors utilizing organic electrolytes, thanks to the large pseudocapacitance of ZTC. Despite relatively thick electrode (0.2 mm) configuration, the asymmetric capacitor could be well operated under a current density of 500 mA g −1. The authors would like to thank the Spanish MINECO, FEDER funds (Project MAT2010-15273 and PRI-PIBJP-2011-0766). This research was also supported by Strategic International Cooperative Program, Japan Science and Technology Agency.
- Published
- 2014