LITHIUM METAL COMPOSITE OXIDE POWDER, POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, AND METHOD FOR PRODUCING LITHIUM METAL COMPOSITE OXIDE POWDER

• Main Authors: MATSUMOTO HIROKI, MATSUO SACHIFUMI, INOUE MASASHI
• Format: Patent
• Language: English; Japanese
• Published: 22.10.2020
• 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 lithium metal composite oxide powder.SOLUTION: A lithium metal composite oxide powder satisfies the following requirements (1) and (2). Requirement (1): the binding energy has a peak top in the range of 52 eV to 58 eV. The spectrum in the range is subjected to waveform separation into a peak A having a peak top at 53.5 ± 1.0 eV and a peak B having a peak top at 55.5 ± 1.0 eV. The value of the ratio (P (A)/P (B)) of the areas of the peak A and the peak B is 0.3 or more and 3.0 or less. Requirement (2): the ratio between the lithium amount (X(Li)) obtained on the basis of a peak area of Li1s spectrum and the element amount (X(M)) of an element M obtained on the basis of a peak area of spectrum of the element M, (X(M)/X(Li)), is 0.2 or more and 2.0 or less.SELECTED DRAWING: None 【課題】リチウム金属複合酸化物粉末の提供。【解決手段】下記要件(１)及び要件(２)を満たす、リチウム金属複合酸化物粉末。要件（１）結合エネルギーが５２ｅＶから５８ｅＶの範囲にピークトップを有する。前記範囲のスペクトルを５３．５±１．０ｅＶにピークトップを有するピークＡと、５５．５±１．０ｅＶにピークトップを有するピークＢとへ波形分離する。ピークＡとピークＢとの面積の比（Ｐ（Ａ）／Ｐ（Ｂ））の値が、０．３以上３．０以下である。要件（２）Ｌｉ１ｓスペクトルのピーク面積に基づいて求められるリチウム量（Ｘ（Ｌｉ））と、元素Ｍのスペクトルのピーク面積に基づいて求めた元素Ｍの元素量（Ｘ（Ｍ））との比（Ｘ（Ｍ）／Ｘ（Ｌｉ））が、０．２以上２．０以下である。【選択図】なし