POSITIVE ELECTRODE ACTIVE MATERIAL

• Main Authors: TSUJIKO AKIRA, GOTO IPPEI
• Format: Patent
• Language: English; Japanese
• Published: 13.02.2020
• 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

To provide a positive electrode active material that is less likely to cause decomposition of a non-aqueous electrolyte even when an operating potential is increased.SOLUTION: In a manufacturing method of a positive electrode active material disclosed herein, at least one composite oxide selected from the group consisting of a spinel-based lithium nickel manganese composite oxide, a layered lithium composite oxide, and a lithium-excess layered lithium composite oxide is subjected to nitrogen plasma treatment and is doped with 2 to 10 atomic % nitrogen.SELECTED DRAWING: Figure 3 【課題】作動電位が高くなっても非水電解液の分解を起こし難い正極活物質を提供する。【解決手段】ここに開示される正極活物質の製造方法は、スピネル系リチウムニッケルマンガン複合酸化物、層状リチウム複合酸化物、およびリチウム過剰層状リチウム複合酸化物からなる群より選ばれる少なくとも１種の複合酸化物を、窒素プラズマ処理して、２〜１０原子％の窒素をドープすることを特徴とする。【選択図】図３