METHOD FOR MANUFACTURING ELECTRODE BODY

• Main Authors: SHINDO YOHEI, SHIMO YUSUKE
• Format: Patent
• Language: English; Japanese
• Published: 12.10.2017
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

PROBLEM TO BE SOLVED: To provide a method for manufacturing an electrode body, which enables the achievement of good interface junction between an electrode active material and an oxide solid electrolyte with the need for high-temperature baking, and which enables the increase in capacity of a lithium ion battery.SOLUTION: A method for manufacturing an electrode body comprises the steps of: (A) preparing an electrode body precursor by coating a surface of a current collector with an electrode active material slurry including electrode active material particles including a lithium element, and a first solvent, and drying the coating; (B) impregnating the electrode body precursor with a solid electrolyte precursor solution; and (C) drying the electrode body precursor impregnated with the solid electrolyte precursor solution. The solid electrolyte precursor solution includes: a second solvent; a first oxide solid electrolyte raw material dissolved in the second solvent; and a second oxide solid electrolyte raw material dissolved in the second solvent. The second solvent is an aqueous solvent, which contains no organic solvent. Neither the first oxide solid electrolyte raw material dissolved in the second solvent, nor the second oxide solid electrolyte raw material dissolved in the second solvent has a carbon element.SELECTED DRAWING: Figure 1 【課題】高温での焼成を必要とせずに、電極活物質と酸化物固体電解質との界面の接合を良好にし、リチウムイオン電池の容量を向上させる、電極体の製造方法を提供する。【解決手段】（Ａ）リチウム元素を含有する電極活物質粒子と第１の溶媒とを含む電極活物質スラリーを集電体の表面に塗布し、乾燥させて電極体前駆体を作製する工程、（Ｂ）電極体前駆体に固体電解質前駆体溶液を含浸させる工程、及び（Ｃ）固体電解質前駆体溶液を含浸させた電極体前駆体を乾燥させる工程を含み、固体電解質前駆体溶液は、第２の溶媒、第２の溶媒に溶解した第１の酸化物固体電解質原料、及び第２の溶媒に溶解した第２の酸化物固体電解質原料を有し、第２の溶媒は水系溶媒であり、かつ有機溶媒を含まず、かつ第２の溶媒に溶解した第１の酸化物固体電解質原料、及び第２の溶媒に溶解した第２の酸化物固体電解質原料は、炭素元素を有さない、電極体の製造方法。【選択図】図１