Negative electrode material for secondary battery, negative electrode, and secondary battery

JP2025036548APending Publication Date: 2025-03-14TERA TECHNOS CO LTD
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Patent Information

Application Number
JP2024228578
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2020-10-30
Filing Date
2024-12-25
Publication Date
2025-03-14

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Benefits of technology

【0041】 本発明による二次電池用負極材は、シリコン酸化物、アルカリ金属とアルカリ土類金属およびポスト遷移金属からなる群から選択される一つ以上のドーピング元素とシリコンとの複合酸化物、またはこれらの混合物を含有するマトリックスおよびマトリックスに分散含浸されており、残留圧縮応力を有するナノ粒子状のシリコンによって向上した機械的物性、電気化学的特性を有し、特に、高い放電容量とともにシリコン系負極材が備えられた二次電池の実商用化が可能な水準の容量維持率を有する利点がある。

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Abstract

To a negative electrode material for a secondary battery.SOLUTION: A negative electrode material for a secondary battery according to the present invention includes a matrix containing a silicon oxide, a composite oxide of one or more doping elements selected from the group consisting of alkali metals, alkaline earth metals, and post-transition metals and silicon, or a mixture thereof, and silicon nanoparticles dispersed and impregnated in the matrix, and has a hardness of 4.0 GPa or more and a Young's modulus of 40 MPa or more according to a nanoindentation test.SELECTED DRAWING: Figure 2
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Citation Information

Patent Citations

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