Synthesis and characterization of NaCo(1-x)MnxO2 solid electrolyte using sol-gel method: the effect of milling speed variations

12th Joint Conference on Chemistry

Suyati, L.^1 ; Widyayanti, O.A.^1 ; Qushoyyi, M.^1 ; Darmawan, A.^1 ; Nuryanto, R.^1

Physical Chemistry Laboratory, Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University, Jl. Prof. Sudharto SH, Tembalang, Semarang

50275, Indonesia^1

关键词: Ball milling process;    Battery performance;    Conductivity meters;    Electrical energy;    Electrochemical process;    Homogeneous surfaces;    Sodium battery;    Synthesis and characterizations;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/349/1/012032/pdf
DOI  :  10.1088/1757-899X/349/1/012032

来源: IOP

【 摘 要 】

Battery is a device that converts chemical energy into electrical energy through electrochemical process. Further research on the synthesis of cathode of Na-ion battery that has good conductivity to maximize the battery performance needs to be conducted. One of the production steps of the NaCo(1-x)NaCo cathode synthesis in the Na-Ion battery was a ball-milling process, in which by the ball-milling process, the crystal size of NaCo(1-x)MnxO2cathode can be minimized. The purpose of this study was to determine the effect of variation of ball-milling speed to the characteristics of resulting product including the oxide types composing NaCo(1-x)MnxO2cathode, surface morphology, and conductivity. The main ingredients used were sodium acetate, manganese acetate, cobalt acetate with molar ratio of 0.7: 0.66: 0.22, respectively and citric acid as chelating agent with the M/CA ratio of 1: 1. The variations of milling speed were 0, 300, 400, 500, 600 and 700 rpm. Characterization of the product was conducted using XRD, SEM-EDS, and conductivity meter (LCR-meter). The result showed that a solid electrolyte of NaCo(1-x)MnxO2consisting of NaMnO2, NaO2, CoO, Co2O3, MnO2components was successfully synthesized. The observation on the milling speed at 400 rpm showed that the solid electrolyte produced had the highest conductivity i.e. 4.08 x 10-6 Scm-1with a homogeneous surface morphology and had a spinel formula NaCo0,65Mn0,35O2.