Wearable Battery Charger
OwnerAiping Yu, Zhongwei Chen +2inventors
InventorsAiping Yu, Zhongwei Chen, Gordon Chiu, Teresa Sung
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Abstract
An all graphene battery is disclosed. The battery is designed into a form of a belt and can charge multiple portable electric devices simultaneously. The battery has a graphene based anode, a graphene composite based cathode. The electrolyte of the battery is gel like functionalized graphene oxide. The device of this disclosure may use thermoelectric effect to charge itself. The battery of this disclosure is safe, and has a high capacity, high energy density and long life time. The battery includes no liquids and is light weighted.
Claims21
A graphene based battery comprising:
- a graphene based anode;
- a graphene composite based cathode;
- and
- a graphene oxide based electrolyte.
A wearable graphene battery, comprising an electrolyte layer in between an anode layer and a cathode layer, wherein
- the anode layer comprises graphene and Si nanoparticles or graphene, Si- and Ti-nanoparticles;
- the cathode layer comprises graphene and nickel oxide, or graphene, nickel oxide and cobalt oxide or graphene and lithium nickel oxide or graphene and lithium cobalt oxide;
- and
- the electrolyte layer comprises functionalized graphene oxide, or functionalized graphene oxide and one or more polymer additives.
A method of making a battery said, method comprising the steps of:
- a) providing anode active material by dispersing Si nanoparticles in aqueous solution containing graphene oxide, freeze drying the resulting dispersion to form hydrogel, and reducing graphene oxide to graphene at a temperature of 80° C. to 150° C.;
- b) fabricating an anode by mixing the active material of step a) with a binder and a conductive agent in a solvent, coating slurry on current collector and drying the electrode at about 100° C. under vacuum;
- c) providing cathode active material by dispersing LiCoO2 material in aqueous solution containing graphene oxide, freeze drying the dispersion to form hydrogel, reducing graphene oxide to graphene at a temperature of 450° C. to 950° C.;
- d) fabricating the cathode by mixing the active material of step d) with binder and a conductive agent in a solvent, coating slurry on current collector, and drying the electrode at about 100° C. under vacuum;
- and
- e) providing a gel electrolyte by preparing a free standing functionalized graphene oxide membrane and soaking the film in liquid electrolyte.
Dependencies are inferred from the claim text.