NEGATIVE ELECTRODE MATERIAL FOR SECONDARY BATTERY
To provide a negative electrode material for a silicon type secondary battery having a high battery capacity, improved initial reversible efficiency, and stable cycle characteristics.SOLUTION: A negative electrode material for a secondary battery according to the present invention contains: a matrix...
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Zusammenfassung: | To provide a negative electrode material for a silicon type secondary battery having a high battery capacity, improved initial reversible efficiency, and stable cycle characteristics.SOLUTION: A negative electrode material for a secondary battery according to the present invention contains: a matrix containing at least one or more doping elements (D) selected from the group consisting of a silicon (Si), an alkaline metal, an alkaline earth metal, and a post transition metal by using an element component as a reference, and oxygen (O), and silicon nano particles scattered and impregnated in the matrix. In an X-ray diffraction pattern having composition uniformity and using a CuKα ray, the rate (A1/A2) of the area (A1) of a first peak positioned within a range of a diffraction angle 2θ of 10° to 27.4° to the area (A2) of a second peak positioned within the range of 28±0.5° satisfies 0.8 to 6.SELECTED DRAWING: Figure 2
【課題】高い電池容量を有し、向上した初期可逆高率および安定したサイクル特性を有するシリコン系二次電池用負極材を提供する。【解決手段】本発明に係る二次電池用負極材は、元素成分を基準として、シリコン(Si)、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1つ以上のドーピング元素(D)、および酸素(O)を含有するマトリックスと、前記マトリックスに分散含浸されたシリコンナノ粒子と、を含み、組成均一性を有し、CuKα線を用いたX線回折パターンにおいて、回折角2θが10°~27.4°の範囲に位置する第1ピークの面積(A1)と28±0.5°の範囲に位置する第2ピークの面積(A2)との比(A1/A2)が0.8~6を満たす。【選択図】図2 |
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