NEGATIVE ELECTRODE, LITHIUM ION SECONDARY BATTERY, AND MANUFACTURING METHOD OF THE LITHIUM ION SECONDARY BATTERY

To provide a negative electrode in which a cycle characteristic is improved and provide a lithium ion secondary battery.SOLUTION: In this negative electrode, an intensity ratio x of a lithium metal to a lithium oxide obtained by a Li1s spectrum analyzed by X-ray photoelectron spectroscopy in a state...

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Bibliographic Details
Main Authors AKIMOTO KAZUMA, GOTO SHOTA
Format Patent
LanguageEnglish
Japanese
Published 25.03.2021
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRICITY
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Summary:To provide a negative electrode in which a cycle characteristic is improved and provide a lithium ion secondary battery.SOLUTION: In this negative electrode, an intensity ratio x of a lithium metal to a lithium oxide obtained by a Li1s spectrum analyzed by X-ray photoelectron spectroscopy in a state after a discharge treatment satisfies 1≤x≤2 from a front face to 50 nm in a depth direction.SELECTED DRAWING: None 【課題】サイクル特性が向上する負極及びリチウムイオン二次電池を提供することを目的とする。【解決手段】この負極は、放電処理後の状態で、Ｘ線光電子分光法（ＸＰＳ）で分析されるＬｉ１ｓスペクトルから求められるリチウム酸化物に対するリチウム金属の強度比ｘが、表面から深さ方向５０ｎｍに亘って１≦ｘ≦２を満たす。【選択図】なし
Bibliography:Application Number: JP20190170630