Invention Grant
- Patent Title: Process for producing graphene oxide-bonded metal foil thin film current collector for a battery or supercapacitor
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Application No.: US15231486Application Date: 2016-08-08
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Publication No.: US10586661B2Publication Date: 2020-03-10
- Inventor: Aruna Zhamu , Yi-Jun Lin , Bor Z. Jang
- Applicant: Nanotek Instruments, 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: H01G11/68
- IPC: H01G11/68 ; H01M4/66 ; H01G11/84 ; H01G11/28 ; C01B32/19 ; C01B32/198

Abstract:
A process for producing a thin film graphene oxide-bonded metal foil current collector for a battery or supercapacitor, comprising: (a) preparing a graphene oxide gel having graphene oxide (GO) molecules dissolved in a fluid medium; (b) depositing a layer of GO gel onto at least one of two primary surfaces of a metal foil to form a layer of wet graphene oxide gel, wherein the depositing procedure includes shear-induced thinning of the GO gel; (c) partially or completely removing said fluid medium from the deposited wet layer to form a dry film of GO having an inter-plane spacing d002 of 0.4 nm to 1.2 nm as determined by X-ray diffraction; and (d) heat treating the dry film of graphene oxide to form the thin film graphene oxide-bonded metal foil current collector at a heat treatment temperature from 80° C. to 2,500° C.
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