Activated carbon/manganese dioxide hybrid electrodes for high performance thin film supercapacitors

作者：Jang Yunseok^*; Jo Jeongdai; Jang Hyunjung; Kim Inyoung; Kang Dongwoo; Kim Kwang Young

来源：Applied Physics Letters, 2014, 104(24): 243901.

DOI：10.1063/1.4884391

We combine the activated carbon (AC) and the manganese dioxide (MnO2) in a AC/MnO2 hybrid electrode to overcome the low capacitance of activated carbon and MnO2 by exploiting the large surface area of AC and the fast reversible redox reaction of MnO2. An aqueous permanganate (MnO4-) is converted to MnO2 on the surface of th(e) AC electrode by dipping the AC electrode into an aqueous permanganate solution. The AC/MnO2 hybrid electrode is found to display superior specific capacitance of 290 F/g. This shows that supercapacitors classified as electric double layer capacitors and pseudocapacitors can be combined together.

• 出版日期2014-6-16