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Phase Formation Behavior and Charge-discharge Properties of Carbon-coated Li2MnSiO4 Cathode Materials for Lithium Rechargeable Batteries
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 Title & Authors
Phase Formation Behavior and Charge-discharge Properties of Carbon-coated Li2MnSiO4 Cathode Materials for Lithium Rechargeable Batteries
Sun, Ho-Jung; Chae, Suman; Shim, Joongpyo;
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Carbon-coated powders as the active materials for the cathode were synthesized by planetary ball milling and solid-state reaction, and their phase formation behavior and charge-discharge properties were investigated. Calcination temperature and atmosphere were controlled in order to obtain the phase, which was active electrochemically, and the carbon-coated active material powders with near single phase could be fabricated. The particles of the synthesized powders were secondary particles composed of primary ones of about 100 nm size. The carbon incorporation was essential to enable the Li ions to be inserted and extracted from active materials, and the initial capacity of 192 mAh/g could be obtained in the active materials with 4.8 wt% of carbon.
;planetary ball mill;solid-state reaction;carbon-coating;cathode;lithium rechargeable battery;
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