NEGATIVE ELECTRODE MATERIAL FOR LITHIUM ION BATTERIES LITHIUM ION BATTERY METHOD AND APPARATUS FOR PRODUCING NEGATIVE ELECTRODE FOR LITHIUM ION BATTERIES AND METHOD AND APPARATUS FOR PRODUCING NEGATIVE ELECTRODE MATERIAL FOR LITHIUM ION BATTERIES

摘要

The negative electrode material of one lithium ion battery according to the present invention has silicon microparticles formed by pulverization of crystalline silicon. In addition, the negative electrode material of another lithium ion battery according to the present invention is a diffraction peak attributed to Si(111) in the vicinity of 2θ = 28.4° by X-ray diffraction measurement of a plurality of silicon fine particles made of crystalline silicon. The intensity is greater than that of other diffraction peaks. By employing each of the above-described negative electrode materials, it is possible to obtain a lithium ion battery with little change in charge/discharge capacity even if charge/discharge is repeated.