リチウムイオン二次電池の電極材料用のシリコン又はシリコン酸化物とカーボンナノホーン集合体との複合体及びリチウムイオン二次電池並びにリチウムイオン二次電池の電極材料用のシリコン又はシリコン酸化物とカーボンナノホーン集合体との複合体の製造方法。

摘要

PROBLEM TO BE SOLVED: To provide a composite body of silicon or a silicon oxide and a carbon nanohorn, in which volume change due to insertion and desorption of lithium ions can be relieved, and a method for producing the composite body.SOLUTION: A composite body 10 of silicon or a silicon oxide and a carbon nanohorn includes: a carbon nanohorn aggregate 21 having an opening 211; and silicon or a silicon oxide 31 involved in the carbon nanohorn aggregate 21.