POSITIVE ELECTRODE PRECURSOR AND POSITIVE ELECTRODE SLURRY

To provide a positive electrode precursor for a non-water system hybrid capacitor with excellent high-output and input and high temperature durability, capable of attaining reduction in both process time and defective rate during manufacturing, and to provide a slurry that enables the manufacturing...

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Hauptverfasser: KUSUZAKA KEITA, TAKEDA KOZO
Format: Patent
Sprache:eng ; jpn
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Beschreibung
Zusammenfassung:To provide a positive electrode precursor for a non-water system hybrid capacitor with excellent high-output and input and high temperature durability, capable of attaining reduction in both process time and defective rate during manufacturing, and to provide a slurry that enables the manufacturing of the same.SOLUTION: After the addition of a sodium hydroxide solution to a positive electrode active material layer fetched after immersing a positive electrode precursor in water for 24 hours, the whole acid functional group content of the positive electrode active material layer calculated by back titration using hydrochloric acid is 0.15 mmol/g or more and 2.00 mmol/g or less, based on the weight of the positive electrode active material layer, and/or after a slurry of pH 9.0 or more containing a positive electrode active material, another alkali metal chemical compound, a biding agent, a water-soluble polymer, and a solvent is dried in order to remove the solvent, and the sodium hydroxide solution is added to a solid material fetched after immersion in water for 24 hours, the whole acid functional group content of the solid material calculated by back titration using hydrochloric acid is 0.15 mmol/g or more and 2.00 mmol/g or less, based on the weight of the solid material.SELECTED DRAWING: None 【課題】製造時の工程時間短縮及び不良率低減を行うことができ、高入出力かつ高温耐久性に優れた非水系ハイブリッドキャパシタ用の正極前駆体及びそれを製造することができるスラリーを提供すること。【解決手段】正極前駆体を水に24時間浸漬後に取り出した正極活物質層に対して、水酸化ナトリウム溶液を添加した後、塩酸を用いた逆滴定により算出した正極活物質層の全酸性官能基量が、正極活物質層重量当たり0.15mmol/g以上2.00mmol/g以下であり、かつ/又は正極活物質、正極活物質以外のアルカリ金属化合物、結着剤、水溶性高分子、及び溶媒を含有するpH9.0以上のスラリーを乾燥して溶媒を除去し、水に24時間浸漬後に取り出した固形物に対して、水酸化ナトリウム溶液を添加した後、塩酸を用いた逆滴定により算出した固形物の全酸性官能基量は、固形物重量当たり0.15mmol/g以上2.00mmol/g以下である。【選択図】なし