以矽爲基底的多孔性阳极活性材料、彼之制法、及含该阳极活性材料之锂二次电池;POROUS SILICON-BASED ANODE ACTIVE MATERIAL, METHOD OF PREPARING THE SAME, AND LITHIUM SECONDARY BATTERY INCLUDING THE ANODE ACTIVE MATERIAL

摘要

本发明提供一种以矽为基底的多孔性阳极活性材料，其包括结晶矽(Si)粒子，及复数个在该结晶矽粒子之表面或在表面和内部的孔，其中该复数个孔之至少一部分的晶面之至少一个平面包括(100)平面；以及该以矽为基底的多孔性阳极活性材料之制法。;由于本发明之以矽为基底的多孔性阳极活性材料可容许在锂二次电池充电及放电期间发生的体积膨胀集中在孔上而非该阳极活性材料外部，该以矽为基底的多孔性阳极活性材料可藉由有效率控制该改善体积膨胀来改善该锂二次电池之寿命特征。;Since a porous silicon-based anode active material of the present invention may allow volume expansion, which is occurred during charge and discharge of a lithium secondary battery, to be concentrated on pores instead of the outside of the anode active material, the porous silicon-based anode active material may improve life characteristics of the lithium secondary battery by efficiently controlling the volume expansion.