Invention Grant
- Patent Title: Method of producing electrochemically stable anode particulates for lithium secondary batteries
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Application No.: US16238061Application Date: 2019-01-02
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Publication No.: US10971724B2Publication Date: 2021-04-06
- Inventor: Bor Z. Jang
- Applicant: Global Graphene Group, Inc.
- Applicant Address: US OH Dayton
- Assignee: Global Graphene Group, Inc.
- Current Assignee: Global Graphene Group, Inc.
- Current Assignee Address: US OH Dayton
- Main IPC: H01M10/44
- IPC: H01M10/44 ; H01M4/36 ; H01M10/0525 ; H01M10/058 ; H01M4/587 ; H01M4/62 ; H01M4/38 ; H01M4/02 ; H01M4/52 ; H01M4/48

Abstract:
Producing multiple anode particulates, including: a) dispersing an electrically conducting material, multiple porous primary particles of an anode active material, an optional electron-conducting material, and a sacrificial material in a liquid medium to form a precursor mixture; b) forming the precursor mixture into multiple droplets and drying the droplets; and c) removing the sacrificial material or thermally converting the sacrificial material into a carbon material to obtain multiple particulates, wherein a particulate comprises a plurality of porous anode active material particles having a pore volume Vpp and a solid volume Va, an electron-conducting material, and additional pores having a volume Vp, which are encapsulated by a thin encapsulating layer having a thickness from 1 nm to 10 μm and a lithium ion conductivity from 10-8 S/cm to 5×10-2 S/cm and the volume ratio Vp/Va in the particulate is from 0.1/1.0 to 10/1.0 or (Vpp+Vp)/Va ratio is from 0.3/1.0 to 20/1.0.
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