CAPACITOR CELL WITH HIGH-SPECIFIC-ENERGY ORGANIC SYSTEM

• US 20130155577A1
• Filed: 12/31/2010
• Published: 06/20/2013
• Est. Priority Date: 02/26/2010
• Status: Abandoned Application

• Current Assignee: Shanghai Aowei Technology Development Co., Ltd. (Chengdu Xinzhu Road and Bridge Machinery Company Limited)
• Original Assignee: Shanghai Aowei Technology Development Co., Ltd. (Chengdu Xinzhu Road and Bridge Machinery Company Limited)
• Inventors: Yang, Endong, An, Zhongxun, Wu, Mingxia, Cao, Xiaowei
• Application Number:
  US13/515,053
• Publication Number:
  US 20130155577A1
• Time in Patent Office: Days
• US Class Current: 361/502
• CPC Class Codes: H01G 11/06 with one of the electrodes allowing ions to be reversibly doped thereinto, e.g. lithium ion capacitors [LIC]
• CPC Class Codes: H01G 11/32 Carbon-based
• CPC Class Codes: H01G 11/50 specially adapted for lithium-ion capacitors, e.g. for lithium-doping or for intercalation
• CPC Class Codes: H01M 10/0525 Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
• CPC Class Codes: H01M 4/133 Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02E 60/13 Energy storage using capacitors
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

Abstract

The present invention relates to an organic capacitor battery with high specific energy and high specific power. It is composed of an anode, a cathode, a separator in-between the cathode and anode, and an organic electrolyte. The characteristics of the capacitor battery are that the anode is a mixture of porous carbon materials with a lithium-ion intercalation compound, the cathode is hard carbon, and the electrolyte is an organic solvent electrolyte containing lithium ions. The super capacitor battery prepared according to this invention has high energy density (up to 20-90 W/Kg) and high power density (>4500 W/Kg, and it can be widely used in electric vehicles, power tools, solar energy storage, wind energy storage, portable appliances and other fields.

Claims

1. An organic capacitor battery with high specific energy and high specific power comprising an anode, a cathode, a separator in-between the anode and cathode, and an organic electrolyte.

wherein the anode comprises a mixture of porous carbon materials and a lithium-ion intercalation compound;

the cathode is a hard carbon; and

the electrolyte is an organic solvent electrolyte containing lithium ions.

2. The organic capacitor battery according to claim 1, wherein the hard carbon is selected from the group consisting of resin carbon, organic polymer pyrolytic carbon, soft carbon carbonized material, and mixtures thereof.

3. The organic capacitor battery accordingly to claim 1, wherein the lithium-ion intercalation compound is selected from the group consisting of:

LiCoO₂, LiMn₂O₄, LiNiO₂, LiFePO₄, LiNi_0.8Co_0.2O₂, LiNi_1/3 Co_1/3 Mn_1/3O₂, LiMnO₂, and mixtures thereof.

4. The organic capacitor battery accordingly to claim 1, wherein the mixture of porous carbon materials comprises one selected from the group consisting of activated carbon, carbon cloth, carbon fiber, carbon fiber felt, carbon aerogels, carbon nanotubes, and mixtures thereof.

5. The organic capacitor battery accordingly to claim 1, wherein the electrolyte comprises one selected from the group consisting of:

LiClO₄, LiBF₄, LiPF₆, LiCF₃SO₃, LiN(CF₃SO₂), LiBOB, and LiAsF₆;

the electrolyte is mixed with one selected from the group consisting of;

Me₃EtNBF₄, Me₂Et₂NBF₄, MeEt₃NBF₄, Et₄NBF₄, Pr₄NBF₄, MeBu₃NBF₄, Bu₄NBF₄, Hex₄NBF₄, Me₄PBF₄, Et₄PBF₄, Pr₄PBF₄, Bu₄PBF₄, and mixtures thereof; and

wherein the battery further comprises one selected from the group consisting of;

carbonate, ethyl methyl carbonate, Methyl Propyl Carbonate, sulfurous acid vinyl ester, acrylic ester of sulfurous acid, acetic acid, vinyl acetate, and acetonitrile

6. The organic capacitor battery accordingly to claim 1, wherein the separator comprises one selected from the group consisting of:

polyethylene micro porous composite membrane, polypropylene micro porous membrane, polypropylene/polyethylene composite membrane, inorganic ceramic membrane, paper membrane, and non-woven cloth membrane.

7. A method of making the battery of claim 1 comprising the steps of:

(1) Preparing a positive electrode by;

(a) blending together a mixture of a lithium-ion intercalation compound, a conductive agent, and a binder;

(b)stirring the mixture into a paste;

(c) coating the paste onto an anode current collector; and

(d) drying, grinding, cutting, and vacuum-drying to form a positive electrode;

(2) Preparing a negative electrode by;

(a) blending a hard carbon, a conductive agent and a binder to form a mixture;

(b) stirring the mixture into a paste;

(c) coating the paste onto a cathode current collector;

(d) drying, grinding, cutting and vacuum drying, to form a negative electrode;

(3) Assembling the battery by;

(a) making a cell by stacking or winding the positive and the negative electrodes;

(b) putting the cell into a case selected from the group consisting of;

an aluminum-plastic composite case, an aluminum case, a plastic case, and a steel case; and

sealing the case;

(c) injecting in a non-aqueous electrolyte, wherein the electrolyte is an organic solvent comprising a lithium ion salt.

8. The method according to claim 7, wherein the conductive agents comprise one selected from the group consisting of:

natural graphite, artificial graphite, carbon black, acetylene black, mesophase carbon microbeads, hard carbon, petroleum coke, carbon nanotubes, graphene, and mixtures thereof; and

the binders comprises one selected from the group consisting of;

polytetrafluoroethylene, polyvinylidene fluoride, ethylene, hydroxypropyl methyl cellulose, carboxymethyl cellulose, styrene butadiene rubber, and mixtures thereof.

9. The method according to claim 7, wherein the positive electrode current collectors comprises aluminum foil or aluminum mesh;

and the negative electrode current collector comprises copper foil or copper mesh.