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1. (WO2018102209) GRAPHENE-PROTECTED LEAD ACID BATTERIES

Pub. No.:    WO/2018/102209    International Application No.:    PCT/US2017/062926
Publication Date: Fri Jun 08 01:59:59 CEST 2018 International Filing Date: Thu Nov 23 00:59:59 CET 2017
IPC: H01M 4/133
H01M 4/14
H01M 4/56
Applicants: NANOTEK INSTRUMENTS, INC.
Inventors: ZHAMU, Aruna
JANG, Bor Z.
Title: GRAPHENE-PROTECTED LEAD ACID BATTERIES
Abstract:
A lead acid battery comprising a negative electrode, a positive electrode comprising lead oxide, an electrolyte in physical contact with the negative electrode and the positive electrode, an optional separator positioned between the negative electrode and the positive electrode, wherein the negative electrode comprises a plurality of particulates of graphene-protected lead or lead alloy, wherein at least one of the particulates is formed of a single or a plurality of graphene sheets and a single or a plurality of fine lead or lead alloy particles having a size smaller than 10 µm, and the graphene sheets and the particles are mutually bonded or agglomerated into the particulate with at least a graphene sheet embracing or wrapping around the particulate, and wherein graphene is in an amount of at least 0.01% but less than 99% by weight based on the total weight of the particulate.