Crystallization design of MnO2 towards better supercapacitance

Fabrication of three dimensional carbon nanotube foam by direct conversion carbon dioxide and its application in supercapacitor

“…Among various emerging energy storage technologies, supercapacitors, also called ultracapacitors or electrochemical capacitors, with combined high power and high energy density [1][2][3], have been paid much attention in world wide and will be a promising candidate for energy storage devices. In order to achieve higher capacity, long cycle lifetime, and better rate performance, many efforts have been done to develop new electrode materials for supercapacitors [4][5][6][7]. Among all these materials, the transition metal oxides/hydroxides, such as MnO 2 , Co 3 O 4 , NiO, Ni(OH) 2 , have aroused tremendous research interest due to their very high theoretical capacitance [8][9][10][11][12].…”

YbCl3 electrode in alkaline aqueous electrolyte with high pseudocapacitance

“…2b). The nonrectangular shapes of the CV curves reveal that the charge storage is a characteristic of the pseudocapacitance process originating from the reversible redox reactions of cation [12,22].…”

Prepared MnO2 with different crystal forms as electrode materials for supercapacitors: experimental research from hydrothermal crystallization process to electrochemical performances

“…Zhang et al 15 prepared MnO 2 with different kinds of crystal structures and morphologies via redox reactions of potassium permanganate and sodium nitrite using a hydrothermal process. They also found that nano-a-MnO 2 ball with a low crystalline degree demonstrated a very high specic capacitance of 200 F g À1 .…”