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METHOD FOR PRODUCTION OF LITHIUM COBALTATE-ORIENTED SINTERED PLATE
PROBLEM TO BE SOLVED: To provide a method for producing a flat lithium cobaltate-oriented sintered plate at high yield.SOLUTION: A method for production of a lithium cobaltate-oriented sintered plate includes steps of: (a) preparing a green sheet including CoOparticles having a thickness of 100 μm or less; (b) obtaining a sintered intermediate in which the whole or a part of CoOparticles changes to CoO orienting a (h00) plane parallel to a sheet face by burning the green sheet; (c) lowering the temperature of the intermediate to return to CoOwhile partially leaving CoO to obtain an oriented sintered plate including the CoOand CoO phases; (d) removing or reducing the warping and/or surge of the oriented sintered plate by heat-treating the oriented sintered plate while pressing using a flat face; and (e) introducing lithium in the flattened CoO-oriented sintered plate to form the lithium cobaltate-oriented sintered plate comprising LiCoO. The amount of CoO left in the step (c) is an amount effective for preventing crack of the sintered plate in the step (d).SELECTED DRAWING: Figure 2
【課題】高い歩留りで平坦なコバルト酸リチウム配向焼結板の製造方法の提供。【解決手段】（ａ）Ｃｏ３Ｏ４粒子を含む厚さ１００μｍ以下のグリーンシートを用意し、（ｂ）グリーンシートを焼成して、Ｃｏ３Ｏ４粒子の全部又は一部が、（ｈ００）面をシート面と平行に配向したＣｏＯに変化した焼成中間体とし、（ｃ）焼成中間体を、ＣｏＯを部分的に残留させつつＣｏ３Ｏ４に戻すように降温して、Ｃｏ３Ｏ４相及びＣｏＯ相を含む配向焼結板を得、（ｄ）配向焼結板を平坦面でプレスしながら熱処理して配向焼結板の反り及び／又はうねりを除去又は低減し、（ｅ）平坦化されたＣｏ３Ｏ４配向焼結板にリチウムを導入して、ＬｉＣｏＯ２からなるコバルト酸リチウム配向焼結板を形成する工程を含み、（ｃ）工程において残留させるＣｏＯの量が（ｄ）工程において配向焼成板の割れを防止するのに有効な量である、コバルト酸リチウム配向焼結板の製造方法。【選択図】図２
METHOD FOR PRODUCTION OF LITHIUM COBALTATE-ORIENTED SINTERED PLATE
PROBLEM TO BE SOLVED: To provide a method for producing a flat lithium cobaltate-oriented sintered plate at high yield.SOLUTION: A method for production of a lithium cobaltate-oriented sintered plate includes steps of: (a) preparing a green sheet including CoOparticles having a thickness of 100 μm or less; (b) obtaining a sintered intermediate in which the whole or a part of CoOparticles changes to CoO orienting a (h00) plane parallel to a sheet face by burning the green sheet; (c) lowering the temperature of the intermediate to return to CoOwhile partially leaving CoO to obtain an oriented sintered plate including the CoOand CoO phases; (d) removing or reducing the warping and/or surge of the oriented sintered plate by heat-treating the oriented sintered plate while pressing using a flat face; and (e) introducing lithium in the flattened CoO-oriented sintered plate to form the lithium cobaltate-oriented sintered plate comprising LiCoO. The amount of CoO left in the step (c) is an amount effective for preventing crack of the sintered plate in the step (d).SELECTED DRAWING: Figure 2
【課題】高い歩留りで平坦なコバルト酸リチウム配向焼結板の製造方法の提供。【解決手段】（ａ）Ｃｏ３Ｏ４粒子を含む厚さ１００μｍ以下のグリーンシートを用意し、（ｂ）グリーンシートを焼成して、Ｃｏ３Ｏ４粒子の全部又は一部が、（ｈ００）面をシート面と平行に配向したＣｏＯに変化した焼成中間体とし、（ｃ）焼成中間体を、ＣｏＯを部分的に残留させつつＣｏ３Ｏ４に戻すように降温して、Ｃｏ３Ｏ４相及びＣｏＯ相を含む配向焼結板を得、（ｄ）配向焼結板を平坦面でプレスしながら熱処理して配向焼結板の反り及び／又はうねりを除去又は低減し、（ｅ）平坦化されたＣｏ３Ｏ４配向焼結板にリチウムを導入して、ＬｉＣｏＯ２からなるコバルト酸リチウム配向焼結板を形成する工程を含み、（ｃ）工程において残留させるＣｏＯの量が（ｄ）工程において配向焼成板の割れを防止するのに有効な量である、コバルト酸リチウム配向焼結板の製造方法。【選択図】図２
METHOD FOR PRODUCTION OF LITHIUM COBALTATE-ORIENTED SINTERED PLATE
コバルト酸リチウム配向焼結板の製造方法
OKADA SHIGEKI (author) / YURA YUKINOBU (author) / KOBAYASHI NOBUYUKI (author)
2016-05-09
Patent
Electronic Resource
Japanese
Method for manufacturing lithium cobaltate oriented sintered plate
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