METHOD OF MANUFACTURING POSITIVE MATERIAL FOR LITHIUM ION BATTERY AND ELECTRODE MATERIAL MANUFACTURED BY THE SAME

• Main Authors: KISHIMOTO AKIRA, TERANISHI TAKASHI, YOSHIKAWA YUMI
• Format: Patent
• Language: English; Japanese
• Published: 18.08.2016
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; ELECTRICITY; INORGANIC CHEMISTRY; METALLURGY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

PROBLEM TO BE SOLVED: To provide a method of manufacturing a positive electrode for a lithium ion battery that has an enhanced capacity characteristic at a high charging/discharging rate, and an electrode material manufactured by the method.SOLUTION: A method of manufacturing a positive electrode for a lithium ion battery comprises a dispersion liquid preparing step of dispersing, in liquid, an active material raw material including powdered active material constituting a positive electrode for the lithium ion battery, a powdered first element raw material containing a first element which constitutes ferroelectric material containing the first element and a second element, and a powered second element raw material containing a second element to prepare dispersion liquid, a gelation step of making the dispersion liquid gelate, and a heating step of heating the gel to carry the ferroelectric material on the active material raw material.SELECTED DRAWING: Figure 7 【課題】高速充放電レートにおける容量特性を向上させたリチウムイオン電池の正極材料の製造方法及びこの方法で製造した電極材料を提供する。【解決手段】本発明のリチウムイオン電池の正極材料の製造方法は、リチウムイオン電池の正極を構成する活物質の粉末状とした活物質原料と、第１元素と第２元素とを含有した強誘電体を構成するための第１元素を含有する粉末状とした第１元素原料と、第２元素を含有する粉末状とした第２元素原料とを溶液に分散させて分散液を作製する分散液作製工程と、分散液をゲルとするゲル化工程と、ゲルを加熱して活物質原料に強誘電体を担持させる加熱工程とを有する製造方法である。【選択図】図７