CN105529445A - Negative electrode of lithium ion battery - Google Patents

Negative electrode of lithium ion battery Download PDF

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Publication number
CN105529445A
CN105529445A CN201510985406.4A CN201510985406A CN105529445A CN 105529445 A CN105529445 A CN 105529445A CN 201510985406 A CN201510985406 A CN 201510985406A CN 105529445 A CN105529445 A CN 105529445A
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CN
China
Prior art keywords
negative electrode
lithium ion
ion battery
electrode active
negative
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201510985406.4A
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Chinese (zh)
Inventor
王海波
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Suzhou Gerui Dynamic Power Technology Co Ltd
Original Assignee
Suzhou Gerui Dynamic Power Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Suzhou Gerui Dynamic Power Technology Co Ltd filed Critical Suzhou Gerui Dynamic Power Technology Co Ltd
Priority to CN201510985406.4A priority Critical patent/CN105529445A/en
Publication of CN105529445A publication Critical patent/CN105529445A/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
    • H01M4/621—Binders
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/362—Composites
    • H01M4/364—Composites as mixtures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/38—Selection of substances as active materials, active masses, active liquids of elements or alloys
    • H01M4/386—Silicon or alloys based on silicon
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • H01M4/483—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides for non-aqueous cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
    • H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
    • H01M4/587—Carbonaceous material, e.g. graphite-intercalation compounds or CFx for inserting or intercalating light metals
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Abstract

The invention discloses a negative electrode of a lithium ion battery. The negative electrode comprises a negative electrode material and a current collector, wherein the negative electrode material comprises a negative electrode active substance, a conductive agent and a binding agent, the negative electrode active substance comprises nanometer silicon, silicon dioxide and graphite, the conductive agent is a carbon nanotube, and the binding agent is a water-based binding agent. The negative electrode of the lithium ion battery, disclosed by the invention, adopts an environment-friendly material and has relatively high battery capacity and cycle stability.

Description

A kind of negative pole of lithium ion battery
Technical field
The present invention relates to a kind of negative pole of lithium ion battery.
Background technology
Lithium ion battery applications field is wide, comprises the electric terminal equipment such as mobile phone, notebook computer, or even has moved towards electric automobile and technical field of energy storage; Lithium ion battery is divided into positive pole, negative pole, barrier film, electrolyte and shell from structure.Wherein, negative material generally comprises negative electrode active material, conductive agent and binding agent.
Traditional negative electrode active material is generally graphite, but its capacity of lithium ion battery made is limited, limits the development of lithium ion battery; The more of current research adopts nano-silicon, can embed more lithium ion, but silicon can produce huge change in volume when reacting, causing the mechanical efflorescence of lithium-ion negative pole material even to peel off, thus lithium ion battery was lost efficacy.
Summary of the invention
For the defect existed in prior art, the invention provides a kind of negative pole of lithium ion battery, the battery capacity of lithium ion battery, cyclical stability and Safety and Environmental Protection can be improved.
For achieving the above object, technical scheme of the present invention is:
A negative pole for lithium ion battery, is made up of negative material and collector, and negative material comprises negative electrode active material, conductive agent and binding agent, and collector is Copper Foil; Wherein, in negative material, each components based on weight percentage, negative electrode active material: conductive agent: binding agent is 90-95:1-3:5-8;
More specifically, above-mentioned negative electrode active material is nano-silicon, silicon dioxide and graphite, and conductive agent is carbon nano-tube, and binding agent is water based adhesive.
More specifically, in above-mentioned negative electrode active material, each components based on weight percentage, nano-silicon: silicon dioxide: graphite is 40:10:50.
More specifically, above-mentioned water based adhesive is LA132, adopts the ethanol of 30% to be 3% by the LA132 of 5% dilution.
Advantage of the present invention and beneficial effect are:
1) adopt water-based adhesive to substitute traditional Kynoar as binding agent, meet environmental requirement, and cost is low, security performance is high, and adopt the mode of ethanol dilution, the surface tension of water can be reduced, aqua adhesive is mixed with negative electrode active material better;
2) adopt nano-silicon, silicon dioxide and graphite as composite anode active material, nano-silicon can improve the battery capacity of lithium ion battery, silicon dioxide and the change in volume of graphite available buffer nano-silicon in course of reaction, prevent mechanical efflorescence and the stripping of negative material.
Embodiment
Below in conjunction with embodiment, the specific embodiment of the present invention is further described.Following examples only for technical scheme of the present invention is clearly described, and can not limit the scope of the invention with this.
The technical scheme that the present invention specifically implements is:
A negative pole for lithium ion battery, is made up of negative material and collector, and negative material comprises negative electrode active material, conductive agent and binding agent, and collector is Copper Foil; Wherein, in negative material, each components based on weight percentage, negative electrode active material: conductive agent: binding agent is 92:2:6; Negative electrode active material is nano-silicon, silicon dioxide and graphite, and its ratio is 40:10:50; Conductive agent is carbon nano-tube, and binding agent is water based adhesive LA132, adopts the ethanol of 30% to be 3% by the LA132 of 5% dilution.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (3)

1. a negative pole for lithium ion battery, is made up of negative material and collector, and described negative material comprises negative electrode active material, conductive agent and binding agent, and described collector is Copper Foil; It is characterized in that, in described negative material, each components based on weight percentage, negative electrode active material: conductive agent: binding agent is 90-95:1-3:5-8; Wherein, described negative electrode active material is nano-silicon, silicon dioxide and graphite; Described conductive agent is carbon nano-tube; Described binding agent is water based adhesive.
2., according to the negative pole of the lithium ion battery described in claim 1, it is characterized in that, in described negative electrode active material, each components based on weight percentage, nano-silicon: silicon dioxide: graphite is 40:10:50.
3. according to the negative pole of the lithium ion battery described in claim 2, it is characterized in that, described water based adhesive is LA132, adopts the ethanol of 30% to be 3% by the LA132 of 5% dilution.
CN201510985406.4A 2015-12-25 2015-12-25 Negative electrode of lithium ion battery Pending CN105529445A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510985406.4A CN105529445A (en) 2015-12-25 2015-12-25 Negative electrode of lithium ion battery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510985406.4A CN105529445A (en) 2015-12-25 2015-12-25 Negative electrode of lithium ion battery

Publications (1)

Publication Number Publication Date
CN105529445A true CN105529445A (en) 2016-04-27

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510985406.4A Pending CN105529445A (en) 2015-12-25 2015-12-25 Negative electrode of lithium ion battery

Country Status (1)

Country Link
CN (1) CN105529445A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106531970A (en) * 2016-12-19 2017-03-22 苏州格瑞动力电源科技有限公司 Silicon anode of lithium ion battery
CN108091823A (en) * 2016-11-22 2018-05-29 本田技研工业株式会社 Electrode composition layer and battery
CN113138221A (en) * 2021-04-20 2021-07-20 合肥国轩高科动力能源有限公司 Method for optimizing proportion representation SEI film impedance of conductive agent and binder

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102005569A (en) * 2009-08-28 2011-04-06 上海宝钢化工有限公司 Composite cathode material for lithium ion battery and preparation method thereof
CN102299297A (en) * 2011-07-30 2011-12-28 珠海锂源动力科技有限公司 Cathode of lithium ion battery and preparation method thereof
CN102593426A (en) * 2011-05-07 2012-07-18 天津锦美碳材科技发展有限公司 Method for preparing silicon oxide (SiOx) / carbon (C) composite materials and prepared silicon carbon cathode materials for lithium ion battery

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102005569A (en) * 2009-08-28 2011-04-06 上海宝钢化工有限公司 Composite cathode material for lithium ion battery and preparation method thereof
CN102593426A (en) * 2011-05-07 2012-07-18 天津锦美碳材科技发展有限公司 Method for preparing silicon oxide (SiOx) / carbon (C) composite materials and prepared silicon carbon cathode materials for lithium ion battery
CN102299297A (en) * 2011-07-30 2011-12-28 珠海锂源动力科技有限公司 Cathode of lithium ion battery and preparation method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108091823A (en) * 2016-11-22 2018-05-29 本田技研工业株式会社 Electrode composition layer and battery
CN106531970A (en) * 2016-12-19 2017-03-22 苏州格瑞动力电源科技有限公司 Silicon anode of lithium ion battery
CN113138221A (en) * 2021-04-20 2021-07-20 合肥国轩高科动力能源有限公司 Method for optimizing proportion representation SEI film impedance of conductive agent and binder

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Application publication date: 20160427