CN105680046A - Sizing agents for external coatings of positive and negative electrode coils of lithium ion batteries - Google Patents

Sizing agents for external coatings of positive and negative electrode coils of lithium ion batteries Download PDF

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Publication number
CN105680046A
CN105680046A CN201610180362.2A CN201610180362A CN105680046A CN 105680046 A CN105680046 A CN 105680046A CN 201610180362 A CN201610180362 A CN 201610180362A CN 105680046 A CN105680046 A CN 105680046A
Authority
CN
China
Prior art keywords
lithium ion
positive
hard carbon
activated carbon
pole
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
CN201610180362.2A
Other languages
Chinese (zh)
Inventor
孙全
司晓影
程传捷
王丽芳
徐斌
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.)
JIANGSU FRONT NEW ENERGY CO Ltd
Shuangdeng Group Co Ltd
Original Assignee
JIANGSU FRONT NEW ENERGY CO Ltd
Shuangdeng Group 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 JIANGSU FRONT NEW ENERGY CO Ltd, Shuangdeng Group Co Ltd filed Critical JIANGSU FRONT NEW ENERGY CO Ltd
Priority to CN201610180362.2A priority Critical patent/CN105680046A/en
Publication of CN105680046A publication Critical patent/CN105680046A/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
    • H01M4/36—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
    • 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
    • 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
    • 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
    • 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
    • H01M4/624—Electric conductive fillers
    • 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

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Battery Electrode And Active Subsutance (AREA)
  • Secondary Cells (AREA)

Abstract

The invention discloses sizing agents for external coatings of positive and negative electrode coils of lithium ion batteries. The external coatings of the positive electrode coils are made of activated carbon, and the external coatings of the negative electrode coils are made of hard carbon. The activated carbon sizing agent used for coating comprises, by mass, 20-40% of activated carbon, 1.0-10% of conductive agents, 1.0-5.0% of binders and 50-78% of solvent. The hard carbon sizing agent for coating comprises, by mass, 35-55% of hard carbon, 2.0-10% of conductive agents, 1.0-15% of binders and 30-60% of solvent. Compared with batteries with the same specifications in the prior art, the lithium ion batteries with the sizing agents have the advantages that the performance is much better, battery recycling service life is particularly prolonged by more than 10 times, and momentary ultrahigh rate discharge indexes can be doubled.

Description

The slurry of additional coating is rolled up for lithium ion battery positive and negative electrode pole
Technical field
The invention belongs to metal component surface coating technology field, in particular it relates to the slurry of a kind of coating, roll up the slurry of additional coating especially for lithium ion battery plus-negative plate pole.
Background technology
The base material making lithium ion battery positive and negative electrode pole volume is metal forming. The aluminium foil of scale is coated with the slurry being made up of with conductive agent, binding agent and solvent positive active material, after drying, forms the positive pole pole volume of external coating; It addition, be coated with the slurry being made up of with conductive agent, binding agent and solvent negative electrode active material on the Copper Foil of scale, after drying, form the negative pole pole volume of external coating. Positive and negative electrode pole volume is the raw material for making lithium ion battery positive and negative electrode pole piece. The positive and negative electrode pole piece steady quality made by prior art, it is possible to meet lithium ion battery and apply requirement in normal state. But, existing positive and negative electrode pole piece is arranged in lithium ion battery, and under high magnification state, service life cycle is short. Trace it to its cause is that lithium ion battery is in charging process, lithium ion is deviate from until embedding cathode pole piece surface from positive pole, add that Lithium-ion embeding process time is short, resistance big, have part lithium ion to be deposited on cathode pole piece surface and form Li dendrite, thus strengthen lithium ion battery sorrow deceleration. Now, the industry, in order to slow down the generation of the problems referred to above, have employed two ways targetedly, and one is reduce both positive and negative polarity pole piece thickness; Two is roll up at positive and negative electrode to strengthen conductive agent deal in external coating, to improve the concordance of each point voltage of positive and negative electrode pole piece, thus shortening the consuming time of embedding lithium ion process. The battery energy density that technique is made is relatively low, and substrate metal paper tinsel and for the big problem of the barrier film consumption of layer insulation. Thus, technique improves and can not fundamentally solve the lithium ion battery positive and negative plate problem that service life cycle is short under high magnification state.
Summary of the invention
The present invention mainly overcomes the deficiency that existing goods lithium ion battery plus-negative plate pole is rolled up, it is proposed to the slurry rolling up additional coating for lithium ion battery plus-negative plate pole that a kind of component is rationally, raw material is easy to get, outer painting is convenient and adhesive force is strong. The external coating of this component can strengthen active substance Lithium-ion embeding and deviate from ability and energy density under high magnification, directly the service life cycle of the supporting lithium ion battery of lifting.
The present invention is achieved through the following technical solutions technical goal.
Roll up the slurry of additional coating for lithium ion battery plus-negative plate pole, it thes improvement is that: the material of the positive pole pole volume additional coating of collection liquid surface is activated carbon, and the active carbon layer surface density formed after solidification is 2～20mg/cm2; The material of the negative pole pole volume additional coating of collection liquid surface is hard carbon, and the hard carbon layer surface density after solidification is 2～16mg/cm2, for the activated carbon being coated with, hard carbon slurry respectively by the following preparation of raw material measured by mass percentage:
Activated carbon pulp components
Activated carbon 20%～40%
Conductive agent 1.0%～10%
Binding agent 1.0%～5.0%
Solvent 50%～78%;
Hard carbon pulp components
Hard carbon 35%～55%
Conductive agent 2.0%～10%
Binding agent 1.0%～15%
Solvent 30%～60%.
The present invention compared with prior art, has the positive effect that:
1, charge-discharge magnification is high
Hard carbon has interlaced layer structure, and lithium ion can embed from all angles and deviate from. At one layer of hard carbon of lithium ion battery negative electrode surface recombination, hard carbon can embed or deviate from the lithium ion that high power charging-discharging precipitates out moment. Anode slice of lithium ion battery surface recombination layer of active carbon, activated carbon is the material of a kind of loose structure, owing to self specific surface area is big, it is possible to the substantial amounts of lithium ion of physical absorption. Due to the combined effect of activated carbon and hard carbon, under high magnification, Lithium-ion embeding is strengthened with deviating from ability, thus realizing improving the purpose of high-rate discharge capacity.
2, high rate cyclic long service life
Because of difference compound layer of active carbon, hard carbon on the positive and negative plate of lithium ion battery, improve on the one hand and quickly accept lithium ion ability, avoid on the other hand producing Li dendrite, the most important thing is to directly enhance energy density, so the lithium ion battery of adapted present invention service life cycle under high magnification is long.
Detailed description of the invention
The present invention is further illustrated below according to specific embodiment.
Roll up the slurry of additional coating for lithium ion battery plus-negative plate pole, because of polarized difference, slurry need to be modulated respectively, and the material rolling up the additional coating of collection liquid surface in positive pole pole is activated carbon, and the material rolling up the additional coating of collection liquid surface in negative pole pole is hard carbon. The supporting 10Ah lithium ion battery of the present embodiment, it is desirable to the active carbon layer surface density after solidification is 2～20mg/cm2, the hard carbon layer surface density after solidification is 2～16mg/cm2. Now prepare the slurry of the activated carbon of respective components, hard carbon respectively according to supporting requirement, concrete component is measured as follows by mass percentage:
Activated carbon slurry embodiment component table
Hard carbon slurry embodiment component table
Taking the slurry that the various embodiments described above are made, be respectively coated with the lithium ion both positive and negative polarity pole volume collection liquid surface of pairing, through unified detection after solidification, each embodiment is attained by expection surface density value. In order to verify that the present invention is fitted in the practical application effect in lithium ion battery, activated carbon pulp components takes embodiment 3, hard carbon pulp components takes embodiment 4, anode pole piece and cathode pole piece that thus component is made are installed in resultant battery, then making battery performance contrast test with the prior art finished product of same specification, concrete test result is as follows:
Battery performance contrast test table
Performance comparison test's table from the above is known, the performance of lithium ion battery applying the present invention supporting is good more than prior art same specification battery, particularly circulating battery improves more than 10 times service life, and supports that moment ultra-high magnifications electric discharge index all obtains multiplication.

Claims (1)

1. the slurry rolling up additional coating for lithium ion battery plus-negative plate pole, it is characterised in that: the material of the positive pole pole volume additional coating of collection liquid surface is activated carbon, and the active carbon layer surface density formed after solidification is 2～20mg/cm2; The material of the negative pole pole volume additional coating of collection liquid surface is hard carbon, and the hard carbon layer surface density after solidification is 2～16mg/cm2, for the activated carbon being coated with, hard carbon slurry respectively by the following preparation of raw material measured by mass percentage;
Activated carbon pulp components
Activated carbon 20%～40%
Conductive agent 1.0%～10%
Binding agent 1.0%～5.0%
Solvent 50%～78%;
Hard carbon pulp components
Hard carbon 35%～55%
Conductive agent 2.0%～10%
Binding agent 1.0%～15%
Solvent 30%～60%.
CN201610180362.2A 2016-03-25 2016-03-25 Sizing agents for external coatings of positive and negative electrode coils of lithium ion batteries Pending CN105680046A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610180362.2A CN105680046A (en) 2016-03-25 2016-03-25 Sizing agents for external coatings of positive and negative electrode coils of lithium ion batteries

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610180362.2A CN105680046A (en) 2016-03-25 2016-03-25 Sizing agents for external coatings of positive and negative electrode coils of lithium ion batteries

Publications (1)

Publication Number Publication Date
CN105680046A true CN105680046A (en) 2016-06-15

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106058154A (en) * 2016-08-01 2016-10-26 东莞新能源科技有限公司 Pole piece of negative electrode and preparation method of pole piece as well as lithium-ion battery using negative electrode
CN108134128A (en) * 2017-12-25 2018-06-08 北京小米移动软件有限公司 The battery core and polymer Li-ion battery of polymer Li-ion battery

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101188283A (en) * 2006-11-21 2008-05-28 三星Sdi株式会社 Postive electrode for rechargeable lithium battery and rechargeable lithium battery including same
WO2013021630A1 (en) * 2011-08-09 2013-02-14 パナソニック株式会社 Negative electrode for nonaqueous electrolyte secondary batteries, and nonaqueous electrolyte secondary battery
CN103117374A (en) * 2013-02-19 2013-05-22 宁德新能源科技有限公司 Positive pole tab of lithium ion secondary battery and preparation method thereof
CN103413966A (en) * 2013-07-18 2013-11-27 中国科学院金属研究所 Lithium ion battery having membrane electrode structure, and making method thereof
CN103762335A (en) * 2013-12-30 2014-04-30 曙鹏科技（深圳）有限公司 Lithium titanate electrode plate and lithium ion battery

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101188283A (en) * 2006-11-21 2008-05-28 三星Sdi株式会社 Postive electrode for rechargeable lithium battery and rechargeable lithium battery including same
WO2013021630A1 (en) * 2011-08-09 2013-02-14 パナソニック株式会社 Negative electrode for nonaqueous electrolyte secondary batteries, and nonaqueous electrolyte secondary battery
CN103117374A (en) * 2013-02-19 2013-05-22 宁德新能源科技有限公司 Positive pole tab of lithium ion secondary battery and preparation method thereof
CN103413966A (en) * 2013-07-18 2013-11-27 中国科学院金属研究所 Lithium ion battery having membrane electrode structure, and making method thereof
CN103762335A (en) * 2013-12-30 2014-04-30 曙鹏科技（深圳）有限公司 Lithium titanate electrode plate and lithium ion battery

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106058154A (en) * 2016-08-01 2016-10-26 东莞新能源科技有限公司 Pole piece of negative electrode and preparation method of pole piece as well as lithium-ion battery using negative electrode
CN108134128A (en) * 2017-12-25 2018-06-08 北京小米移动软件有限公司 The battery core and polymer Li-ion battery of polymer Li-ion battery
CN108134128B (en) * 2017-12-25 2020-08-11 北京小米移动软件有限公司 Battery core of polymer lithium ion battery and polymer lithium ion battery

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Address after: Jiangyan District of Jiangsu city in Taizhou province 225526 Liang Xu two Dengke Park No. 1

Applicant after: Jiangsu Shuangdeng frontan new energy Co. Ltd.

Applicant after: Shoto Group Co., Ltd.

Address before: Jiangyan District of Jiangsu city in Taizhou province 225526 Liang Xu two Dengke Park No. 1

Applicant before: Jiangsu Front New Energy Co., Ltd.

Applicant before: Shoto Group Co., Ltd.

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Application publication date: 20160615

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