유기 황계 전극 활물질

• Main Authors: KAKIAGE KENJI, NOHARA YUTA, SHINANO HIROKATSU, AOYAMA YOHEI, YOKOMIZO TOMOFUMI, TAKENOUCHI HIROMI
• Format: Patent
• Language: Korean
• Published: 10.11.2020
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOSITIONS BASED THEREON; ELECTRICITY; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; THEIR PREPARATION OR CHEMICAL WORKING-UP

본 발명의 과제는 큰 충방전 용량을 가지고, 초회 효율이 높으며, 사이클 특성 및 레이트 특성이 뛰어난 비수전해질 이차전지에 알맞게 사용되는 전극 활물질을 제공하는 것에 있다. 본 발명은 나트륨과 칼륨 함량의 합계가 100질량ppm~1000질량ppm인 유기 황계 전극 활물질, 이것을 전극 활물질로 하는 이차전지용 전극 및 상기 전극을 가지는 비수전해질 이차전지이다. 상기 유기 황계 전극 활물질은 추가로 철 함량이 1질량ppm~20질량ppm인 것이 바람직하다. 또한, 상기 유기 황계 전극 활물질은 황변성 폴리아크릴로니트릴이며, 황 함량이 25질량%~60질량%인 것이 바람직하다. An object of the present invention is to provide an electrode active material that has a large charge discharge capacity, a high initial efficiency, as well as excellent cycle characteristics and rate characteristics and is favorably used in a non-aqueous electrolyte secondary battery. The present invention provides an organo sulfur-based electrode active material containing sodium and potassium in a total amount of 100 ppm by mass to 1000 ppm by mass; an electrode for use in a secondary battery, the electrode containing the organo sulfur-based electrode active material as an electrode active material; and a non-aqueous electrolyte secondary battery including the electrode. Preferably, the organo sulfur-based electrode active material further contains iron in an amount of 1 ppm by mass to 20 ppm by mass. Preferably, the organo sulfur-based electrode active material is sulfur-modified polyacrylonitrile, and the amount of sulfur in the organo sulfur-based electrode active material is 25 mass% to 60 mass%.