Electrode for supercapacitor

High specific capacity property (approx. 580F/g) and good cycle property (over 3000 cycles)

Overview

　For conventional electrode such as MnO₂, the repeated life of metal oxide electrode is limited by the mechanical degradation of electrode due to volumetric change in the active oxide layer caused by cycle, due to fast redox reaction effect. Therefore, electrode with thick MnO₂ layer, etc. that has both high capacity and long life cannot be obtained.　
　This invention is able to provide oxide structure with active material that can improve conductivity and increase specific capacity of capacitor. This invention is made of one of Au/Ag/Cu metal alloy and has a porous metal layer of 0.5-40 mm thickness, and a MnO₂ layer consisting of multiple thin sheets of few nm thickness, arranged on both sides of the porous metal layer and having a rock salt structure of 0.1-5 mm thickness. The MnO₂ layer conductivity can be enhanced by forming oxide on both sides of the porous metal layer, such as Au/Ag/Cu. This invention can improve the capacitance property of oxide composed of transition metal for supercapacitor or lithium-ion battery.

Supercapacitor performance

Product Application

・Supercapacitor　
・Lithium ion battery

IP Data

IP No.　 ： JP6179049
Inventor ： CHEN Mingwei, JIAN Likang, FUJITA Takeshi, HIRATA Akihiko
keyword ： Material