Characterization of a new type of asymmetric supercapacitors: LiMn 2O4/MnFe2O4
Journal
ECS Transactions
Journal Volume
16
Journal Issue
1
Pages
223-228
Date Issued
2008
Author(s)
Abstract
Nanocrystalline MnFe2O4 having a spinel structure with Mn and Fe ions randomly distributed over the tetrahedral and octahedral sites have been found to exhibit capacitive characteristics in organic electrolyte containing 1M LiPF6 in the mixture of ethyl carbonate + ethylene methyl carbonate. As characterized by cyclic voltammetry and in-situ synchrotron X-ray absorption spectroscopy, the material show reversible pseudocapacitance behavior over a potential window from 1.75V to 4.5 V versus Li/Li+ with a specific capacitance of ̃125 F/g. Asymmetric supercapacitors consisting of LiMn2O4 cathode and MnFe2O4 anode and Li organic electrolyte has thus been developed and characterized for their electrochemical performance in a three-electrode configuration in order to independently reveal the behaviors of the battery cathode and pseudocapacitive anode. © The Electrochemical Society.
SDGs
Other Subjects
Anodes; Cathodes; Cyclic voltammetry; Electrolytes; Ethylene; Lithium metallography; Lithium-ion batteries; Nanocrystalline materials; Nanocrystals; Phosphorus compounds; Supercapacitor; X ray absorption spectroscopy; Asymmetric supercapacitor; Capacitive characteristics; Electrochemical performance; In-situ synchrotrons; Organic electrolyte; Pseudocapacitance; Randomly distributed; Specific capacitance; Fluorine compounds
Type
conference paper