粉末プロセスの制御と製品評価　　二酸化マンガン‐カーボン系の造粒と成形

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タイトル別名
  • Granulating and Shaping of Manganese Dioxide and Carbon-based Material.
  • 2サンカ マンガン カーボンケイ ノ ゾウリュウ ト セイケイ

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Many coin-shaped lithium batteries have anodes of manganese dioxide and carbon (graphite). Manganese dioxide and graphite differ so much in particle size distribution and apparent density that further granulation is needed to standardize them. The powder is then compressed and shaped into anode pellets. Methods of granulating and shaping anode material, however, are industrial secrets that have not yet been disclosed.<BR>In this study, manganese dioxide, and graphite (carbon)-based material were stirred and further granulated under various conditions. Average particle size and fine grain yield of the obtained powder were examined. The powder was shaped into pellets, whose hardness and electric resistance were measured. This elucidated the granulating time, binder liquid additive percentage, and binder concentration that produced small anode-pellet particles of high yield. The optimal conditions were found for shaping the powder into anode pellets of greater hardness and electric resistance.

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