|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Rare Metal Extraction & Processing
||Electrodeposition of γ-MnO2 from Manganese Nodule Leach Liquor: Surface Modification and Electrochemical Applications
||A. Baral, B.C. Tripathy, M.K. Ghosh
|On-Site Speaker (Planned)
The production electrolytic manganese dioxide (EMD) from polymetallic manganese nodules involved reduction leaching in sulphuric acid medium using sucrose as a reducing agent followed by purification through 2-stage precipitation methods. The purified solution was subjected to electrodeposition. Influence of in-situ addition of a cationic surfactant Cetyl trimethyl ammonium bromide (CTAB) (0 to 500 mg/dm3) on the surface morphology and electrochemical properties of the EMD were examined. The XRD patterns of the deposited material were indexed to the γ-MnO2 phase, the phase responsible for the material’s suitability battery application. FESEM results demonstrated that in the presence of CTAB uniform nano- fibrous type grains were formed. Higher concentration of CTAB in the electrolytic bath drastically decreased the current efficiency (CE) and increased the energy consumption (EC) during electrodeposition. However, in optimum CTAB concentration of 100 mg/dm3 estimated CE and EC were 87.64% and 1.70kWh/Kg respectively along with satisfactory capacitance value.