Anode material for lithium ion battery, lithium ion battery, and method and device for producing anode or anode material for lithium ion battery

• Main Authors: KANATANI YAYOI, HIGO TORU, KOBAYASHI HIKARU
• Format: Patent
• Language: Chinese; English
• Published: 09.10.2020
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

An anode material for a lithium ion battery according to the present invention comprises fine silicon particles obtained by pulverizing crystalline silicon. Another anode material for a lithium ion battery according to the present invention uses X-ray diffraction to measure the intensity of a diffraction peak belonging to Si(111) in the vicinity of 2[theta]=28.4 degrees of a plurality of silicon fine particles formed from crystalline silicon, the intensity being greater than the intensity of other diffraction peaks. By adopting the various anode materials, a lithium ion battery can be obtained, and the charge-discharge capacity is not easy to change even if the lithium ion battery is charged and discharged repeatedly. 本发明的一锂离子电池的负极材料具有将晶体硅粉碎而成的硅微粒。本发明的另一锂离子电池的负极材料如下：利用X射线衍射可测得由晶体硅形成的多个硅微粒在2θ＝28.4°附近归属于Si(111)的衍射峰的强度，该强度大于其他衍射峰的强度。通过采用上述各种负极材料，能够得到一种锂离子电池，即使反复对其充放电，充放电容量也难以发生变化。