214 機械的応力を利用して作製した前駆体からのリチウムイオン二次電池用正極材料LiNiO_2の合成

概要

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Grinding machines are of course developed to pulverize powders. However, recently obtainable high-energy mills can be applied to induce chemical reactions or peculiar morphology of ground products. We applied high-energy planetary milling to preparation of precursors for a cathode material, LiNiO_2 on Lithium-ion batteries. For the synthesis of this material, high-reactivity and easy supplement of oxygen-gas are required to reduce the synthesis temperature where the vaporization of Lithium is not severe. The ground precursors are the composite powder consisting of fine and deformed (reactive) NiO combined by LiOH. This morphology provides the path of atmospheric gas required for the oxidation of NiO. As the result, well-crystallized LiNiO_2 can be prepared at the low temperature less than 750℃ in the ambient atmosphere. The resultant LiNiO_2 powder indicates good charge/discharge property, 140mAh・g^<-1>.
一般社団法人日本機械学会の論文
2001-09-20