CN1176502A - Method of manufacturing electrode active material for alkaline secondary cell - Google Patents

Method of manufacturing electrode active material for alkaline secondary cell Download PDF

Info

Publication number
CN1176502A
CN1176502A CN97116154A CN97116154A CN1176502A CN 1176502 A CN1176502 A CN 1176502A CN 97116154 A CN97116154 A CN 97116154A CN 97116154 A CN97116154 A CN 97116154A CN 1176502 A CN1176502 A CN 1176502A
Authority
CN
China
Prior art keywords
active material
electrode active
composition
secondary cell
alkaline secondary
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
CN97116154A
Other languages
Chinese (zh)
Inventor
黄祜铉
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.)
Samsung SDI Co Ltd
Original Assignee
Samsung Electron Devices 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 Samsung Electron Devices Co Ltd filed Critical Samsung Electron Devices Co Ltd
Publication of CN1176502A publication Critical patent/CN1176502A/en
Pending legal-status Critical Current

Links

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
    • H01M4/24—Electrodes for alkaline accumulators
    • H01M4/26—Processes of manufacture
    • 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
    • H01M4/04—Processes of manufacture in general
    • H01M4/0402—Methods of deposition of the material
    • H01M4/0404—Methods of deposition of the material by coating on electrode collectors
    • 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
    • H01M4/04—Processes of manufacture in general
    • H01M4/0471—Processes of manufacture in general involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis
    • 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
    • H01M4/624—Electric conductive fillers
    • H01M4/625—Carbon or graphite
    • 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

Landscapes

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

Abstract

The present invention provides a method for manufacturing electrode active material. The method includes forming a first composition by mixing proofreading conductive reinforcing agent, thickener and solvent; making ultrasonic through the first composition in order to disperse the first composition; mixing a bond with a metal compound which is the main component of the electrode active material in order to form a second composition; filling the first composition to the second composition and mixing them. Therefore, even using the additive content lower than conventional technology, the proofreading conductive reinforcing agent, the thickener and solvent can be uniformly dispersed to the material by using ultrasonic; thereby the battery capacity can be increased.

Description

Produce the method for electrode active material for alkaline secondary cell
The present invention relates to storage battery, more particularly, relate to the method for producing electrode active material for alkaline secondary cell.
The electrode of alkaline battery is made up of the electrode active material in porous current collector with a large amount of electric holes and packing porous current collector electricity hole.Electrode is produced with sintering method usually.Use the battery of sintering method to have outstanding useful life, but its capacity is little, production method is complicated and the production time is long.
The paste method that addresses the above problem has below been described.
At first, will in ball mill, fully mix such as the key component of the active material alloy, conduction reinforcing agent and the thickener of nickel hydroxide or occlude hydrogen.Then, pure water and adhesive are added in the mixture, form paste.
Be sprayed onto the electrode activity paste that obtains on the porous current collector or with the roller coating with sprayer, dry then, finish an electrode by this.
When the thickener that adds for the viscosity that increases active material contact with water, thickener is self-adhered.Therefore, be very difficult to thickener is distributed in the water equably.In order to address this problem, stir the active material admixture that contains above-mentioned thickener in the blender high speed such as ball mill.Yet, since in this process a large amount of bubble of product, use defoamer to remove bubble, this makes this method complexity, and increases the cost of product.
Therefore, target of the present invention provides evenly dispersing additive (such as conduction reinforcing agent, adhesive and thickener), reduces additive level by this and further increases the method for the production electrode active material for alkaline secondary cell of battery capacity.
For the method for finishing the production electrode active material for alkaline secondary cell that target of the present invention provides may further comprise the steps:
To conduct electricity reinforcing agent, thickener and solvent to form first composition;
Make ultrasonic wave pass through described first composition to disperse first composition;
Adhesive is mixed with metallic compound as the electrode active material main component, form second composition;
Described first composition is added in second composition, mix.
According to the present invention, make ultrasonic wave by comprising first composition of conduction reinforcing agent and thickener, by this additive is evenly dispersed in the active material.As a result, even use and to be less than the used additive level of prior art, the electrode pad that also can obtain to have outstanding bonding strength, capacity and active material availability factor.
The conduction reinforcing agent preferably is selected from carbon black and Delanium, and adhesive preferably is selected from polytetrafluoroethylene and styrene butadiene ribber.In addition, thickener is selected from carboxymethyl cellulose (CMC) and hydroxypropyl methylcellulose (HPMC).
In addition, the content of electrode active material main component is preferably the 99-99.9% (weight) of electrode active material total solids content.In addition, the content of conduction reinforcing agent is preferably the 0.05-0.15% (weight) of electrode active material total solids content.
Embodiment 1
Make ultrasonic wave about 30 minutes by the mixture that contains 150g water, 0.5g carbon black and 0.5g HPMC.Then, in the alloy adding mixture with 1g PTFE and 1kg occlude hydrogen, place mixing plant to mix in mixture then, produce hydrogen cathode activity paste by this.
With the paste cladding thickness is the stainless steel grid of 0.06mm, dry then, produces hydrogen negative electrode plate by this.The hydrogen negative electrode plate that obtains is cut into the size of 30mm * 50mm.
Anode adopts the nickel anode of the sintering made from conventional method.
Use hydrogen negative electrode and nickel anode to make Ni-MH battery.
Embodiment 2
Carry out embodiment 2 with the mode identical, only be to use 1g carbon black, 1gHPMC and 3.5g PTFE with embodiment 1.
Embodiment 3
Carry out embodiment 3 with the mode identical, only be to use 1.5g carbon black, 1.5g HPMC and 7g PTFE with embodiment 1.
Embodiment 4
Carry out embodiment 4 with the mode identical, only be to use 2g carbon black, 2gHPMC and 10g PTFE with embodiment 1.
Comparative example 1
The mixture that will contain alloy, 2g HPMC and the 2g carbon black of 1kg occlude hydrogen places ball mill, mixes about 2 hours with 8rpm then.
The mixture and the 10g PTFE that obtain are placed mixing plant, mixed then about 30 minutes, produce hydrogen negative electrode paste by this.
With the paste cladding thickness is the stainless steel grid of 0.06mm, dry then, produces hydrogen negative electrode plate by this.The hydrogen negative electrode plate that obtains is cut into the size of 30mm * 50mm.
Anode adopts the nickel anode made from conventional method.
Use hydrogen negative electrode and nickel anode to make Ni-MH battery.
Comparative example 2
Compare example 2 with the mode identical, only be to use 20g carbon black, 5gHPMC and 20g PTFE with comparative example 1.
Each Ni-MH battery of producing separately according to embodiment 1-4 and comparative example 1-2 charges 1 coulomb according to 150% (weight) of capacity, discharges 0.2 coulomb then.Repeat this method, till the voltage of each battery becomes 0.9V, measure the theoretical capacity of each battery, the availability factor of active material and the bonding strength of active material then.Here, the theoretical capacity of battery is the alloy 270mAh of every 1g occlude hydrogen.
Table 1 shows the result of measurement.
Table 1
Theoretical capacity *????(mAh) The availability factor of active material **(％) Bonding strength
Embodiment 1 ????800 ????95 A little less than
Embodiment 2 ????800 ????92 Medium
Embodiment 3 ????800 ????99 By force
Embodiment 4 ????800 ????99 The strongest
Comparative example 1 ????800 ????90 By force
Comparative example 2 ????800 ????90 The strongest
*The quality of the alloy of theoretical capacity=occlude hydrogen (g) * (270mAh/g) *Availability factor=the actual capacity of active material (mAh) ÷ theoretical capacity (mAh) * 100
As shown in table 1, ultrasonic wave is passed through under the situation of mixture, when the alloy content of occlude hydrogen is 99.8% (weight) (embodiment 1), 99.5% (weight) (embodiment 2) of electrode active material total solids content and 99.0% (weight) (embodiment 3), the effectiveness of cell active materials is very outstanding, and when the alloy content of occlude hydrogen was 98.6% (weight) (embodiment 4), the effectiveness of active material was good.Yet under the situation of using the blender such as ball mill, when the alloy content of the occlude hydrogen in the whole active compound composition was 98.6% (comparative example 1), 95.7% (comparative example 2), the effectiveness of cell active materials was lower than the effectiveness of embodiment 1-4.
According to the present invention, even with being lower than the used additive level of routine techniques,, increase the capacity of battery by this by using ultrasonic wave also dispersed electro-conductive reinforcing agent, adhesive and thickener equably.

Claims (6)

1. produce the method for electrode active material for alkaline secondary cell, may further comprise the steps:
To conduct electricity reinforcing agent, thickener and solvent to form first composition;
Make ultrasonic wave pass through described first composition to disperse first composition;
Adhesive is mixed with metallic compound as the electrode active material main component, form second composition;
Described first composition is added in second composition, mix.
2. according to the method for the production electrode active material for alkaline secondary cell of claim 1, wherein the content of electrode active material main component is the 99-99.9% (weight) of electrode active material total solids content.
3. according to the method for the production electrode active material for alkaline secondary cell of claim 1, the content of reinforcing agent of wherein conducting electricity is the 0.05-0.15% (weight) of electrode active material total solids content.
4. according to the method for the production electrode active material for alkaline secondary cell of claim 1, the reinforcing agent that wherein conducts electricity preferably is selected from carbon black and Delanium.
5. according to the method for the production electrode active material for alkaline secondary cell of claim 1, wherein, adhesive preferably is selected from polytetrafluoroethylene and styrene butadiene ribber.
6. according to the method for the production electrode active material for alkaline secondary cell of claim 1, wherein, thickener is selected from carboxymethyl cellulose (CMC) and hydroxypropyl methylcellulose (HPMC).
CN97116154A 1996-08-27 1997-07-31 Method of manufacturing electrode active material for alkaline secondary cell Pending CN1176502A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1019960035881A KR19980016338A (en) 1996-08-27 1996-08-27 METHOD FOR PRODUCING ELECTRODE ACTIVE MATERIAL FOR ALKALIARY SECONDARY BATTER
KR35881/96 1996-08-27

Publications (1)

Publication Number Publication Date
CN1176502A true CN1176502A (en) 1998-03-18

Family

ID=19471026

Family Applications (1)

Application Number Title Priority Date Filing Date
CN97116154A Pending CN1176502A (en) 1996-08-27 1997-07-31 Method of manufacturing electrode active material for alkaline secondary cell

Country Status (2)

Country Link
KR (1) KR19980016338A (en)
CN (1) CN1176502A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101207196B (en) * 2006-12-22 2011-01-12 比亚迪股份有限公司 Method for preparation of nickel-metal hydride storage cell nickel anode

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101207196B (en) * 2006-12-22 2011-01-12 比亚迪股份有限公司 Method for preparation of nickel-metal hydride storage cell nickel anode

Also Published As

Publication number Publication date
KR19980016338A (en) 1998-05-25

Similar Documents

Publication Publication Date Title
US3248267A (en) Catalytic electrode and fuel cell containing the same
CN101855752A (en) Nonaqueous battery anode mixture and anodal structure
CN102971897A (en) Current collector
US3385736A (en) Method of making electrode from viscoelastic dough
CN114464897B (en) Method for improving high-temperature floating charge performance of lithium ion battery and lithium ion battery
CA1144519A (en) Sintered metal powder-coated electrodes for water electrolysis
EP4231371A1 (en) A porous free-standing flexible thick electrode sheet and its preparation method
CN1176502A (en) Method of manufacturing electrode active material for alkaline secondary cell
EP0785584A1 (en) Precoated steel sheet for positive electrode can of alkaline dry cell
CN114891136B (en) Multi-branched structure binder and preparation method and application thereof
CN1505185A (en) Process for making electrode binding sizing agent of lithium ion secondary cell
CN114792831A (en) High-performance long-life anti-reverse electrode membrane electrode and preparation method thereof
US4182670A (en) Combined cathode and diaphragm unit for electrolytic cells
CN113948700B (en) Monodisperse atomic cluster-activated carbon composite material and application thereof in lead carbon battery
CN113373472A (en) Polypyrrole/rhodium nanoparticle composite flexible electrode and preparation method and application thereof
CN113839009A (en) Negative electrode slurry and preparation method thereof, negative electrode plate and secondary battery
EP0174526A2 (en) Nickel-cadmium accumulator sealed in a gas-tight way
CN111416139A (en) Electrolyte corrosion inhibitor, aluminum-air battery, alkaline electrolyte and preparation method thereof
JP2775829B2 (en) Zinc alkaline battery
CN114824280B (en) Composite positive electrode material for lithium ion battery dry-method electrode and preparation method and application thereof
CN115110112B (en) Industrial preparation method of nickel-molybdenum electrode and nickel-molybdenum electrode
Hall et al. AB5-catalyzed hydrogen evolution cathodes
Elizalde et al. Characterization of Ni‐Polyvinylchloride and NiCo2 O 4/Ni‐Polyvinylchloride Composites as Electrodes in Alkaline Solutions
CN114808019B (en) In-situ preparation method and application of transition metal/black phosphorus alkene electrocatalyst
CN1215141C (en) Nickel-hydrogen battery adhesive

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C01 Deemed withdrawal of patent application (patent law 1993)
WD01 Invention patent application deemed withdrawn after publication