Electrodeposited Manganese Oxide for Electrochemical Capacitor: Effect of Substrates on the Capacitive Behavior of Electrodes
Abstract
Electrochemical capacitor (EC), also named as supercapacitor or ultracapacitor have been known as one of the potential energy storage systems. In recent years, many research focus on two modes of electrochemical capacitor: the pseudocapacitor and the electrochemical double layer capacitor [1]. The types of electrode materials are carbon, transition metal oxides and conducting polymers. Manganese oxides have attracted increasing interest in the field of active electrode material for ECs due to their low cost, abundance, environmental friendly nature and potentially replacing ruthenium oxide in the future [2]. However, these materials exhibit the inherent disadvantage of low conductivity and low specific capacitance. The improvement pursed in manganese oxides mainly concerns electronic conductivity, the specific capacitance and rate capability. Several methods have been developed for this improvement, consisting of nanostrutured material, deposited thin film, Ni or Co doped materials and composite material (with carbon, other metal oxides such FeOx, NiO…) [2-4]. In order to improve its electrochemical properties (cycling stability, charge/discharge capacity), all the factors related to the method synthesis such as stoichiometry, crystal structure and morphology of the active materials need to be wholely investigated.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Aug 05, 2014
- Source ID
- 10.1149/ma2014-02/3/177
Entities
People
- Man Van Tran
- My Loan Phung Le
- The An Ha
- Thi Ai Nguyet Nguyen