The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 29, 2025
Filed:
Apr. 12, 2019
National Synchrotron Radiation Research Center, Hsinchu, TW;
Shi-Wei Chen, Hsinchu, TW;
NATIONAL SYNCHROTRON RADIATION RESEARCH CENTER, Hsinchu, TW;
Abstract
A polymorphic lithium-silicon compounds for use in pure silicon anode of lithium-ion battery and use thereof are provided. The pure silicon anode includes nucleuses which have one or more structures of LiSi_Cmcm, LiSi_Pbam, LiSi_C12m1, and LiSi_I41/AZ. It was generally believed LiSi_Cmcm to be a high-temperature stable phase, not presenting at room temperature or in the pure silicon anode of lithium-ion battery, but this present invention proves that LiSi_Cmcm can exist in the disclosed material. After lithiation process, the pure silicon anode can have a structure of one or more of LiSi_Cmcm, LiSi_Pbam, LiSi_C12m1, and LiSi_I41/AZ, with extremely improved capacity. The present disclosure may increase the electrical capacity of the pure silicon anode in actual use and solve the problem of the existing pure silicon anode that the volume expansion after repeated lithiation and delithiation leads to electrode damage and battery failure.