CN109411759B - High-temperature lithium ion power battery and pre-formation method thereof - Google Patents

High-temperature lithium ion power battery and pre-formation method thereof Download PDF

Info

Publication number
CN109411759B
CN109411759B CN201811247409.8A CN201811247409A CN109411759B CN 109411759 B CN109411759 B CN 109411759B CN 201811247409 A CN201811247409 A CN 201811247409A CN 109411759 B CN109411759 B CN 109411759B
Authority
CN
China
Prior art keywords
positive electrode
battery
lithium ion
ion power
negative electrode
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.)
Active
Application number
CN201811247409.8A
Other languages
Chinese (zh)
Other versions
CN109411759A (en
Inventor
沈晓彦
陆佳华
周建新
王兴威
胡丹丹
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 Haisida Power Supply Co ltd
Original Assignee
Jiangsu Highstar Battery Manufacturing 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 Highstar Battery Manufacturing Co ltd filed Critical Jiangsu Highstar Battery Manufacturing Co ltd
Priority to CN201811247409.8A priority Critical patent/CN109411759B/en
Publication of CN109411759A publication Critical patent/CN109411759A/en
Application granted granted Critical
Publication of CN109411759B publication Critical patent/CN109411759B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • 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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • 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
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/4235—Safety or regulating additives or arrangements in electrodes, separators or electrolyte
    • 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
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H01M10/446—Initial charging measures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Abstract

The invention relates to the technical field of lithium batteries, in particular to a high-temperature lithium ion power battery and a pre-formation method thereof. The high-temperature lithium ion power battery comprises a positive electrode, a negative electrode, electrolyte, a diaphragm, an insulating gasket, an insulating PE sleeve and a battery shell, wherein the positive electrode comprises positive electrode powder and an organic solvent, and the positive electrode powder comprises 92-95 wt% of positive electrode active substances, 1-3 wt% of activated carbon, 1-3 wt% of positive electrode conductive agents and 1-3 wt% of positive electrode adhesive agents. According to the invention, the activated carbon is added into the positive electrode powder material, and the activated carbon can effectively adsorb gas generated by decomposition of the battery under a high-temperature condition, so that the polarization phenomenon in the battery is reduced, and the high-temperature cycle performance of the battery is improved.

Description

High-temperature lithium ion power battery and pre-formation method thereof
Technical Field
The invention relates to the technical field of lithium batteries, in particular to a high-temperature lithium ion power battery and a pre-formation method thereof.
Background
With the increasing emphasis on environmental protection in China, the traditional automobile industry faces environmental challenges, and the development of new energy automobiles becomes social consensus.
With the development of science and technology, the varieties of batteries of electric vehicles sold in new energy markets are more and more, but the cycle life attenuation acceleration phenomenon can occur in most batteries used by pure electric vehicles under the condition that the service environment exceeds 50 ℃, so that the problems of the attenuation of the endurance mileage of the vehicles and the like are caused.
The reason for the accelerated decay of the cycle life of the lithium ion battery is mainly that the service life of the battery is reduced due to the increase of the internal polarization of the power battery under the conditions of high-temperature charge and discharge, the increase of gas generation, and the loss of electrolyte and anode and cathode materials.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide a high-temperature lithium ion power battery which has good cycle life and safety performance under high-temperature conditions.
The second purpose of the invention is to provide a pre-formation method of a high-temperature lithium ion power battery, which can reduce the polarization phenomenon of the electrode of the battery under the high-temperature condition.
In order to achieve the purpose, the invention provides a high-temperature lithium ion power battery which comprises a positive electrode, a negative electrode, electrolyte, a diaphragm, an insulating gasket, an insulating PE sleeve and a battery shell, wherein the positive electrode comprises positive electrode powder and an organic solvent, and the positive electrode powder comprises 92-95 wt% of positive electrode active substances, 1-3 wt% of active carbon, 1-3 wt% of positive electrode conductive agents and 1-3 wt% of positive electrode adhesive agents.
The invention also provides a pre-formation method of the high-temperature lithium ion power battery, which comprises the following steps:
(1) charging the battery for 30-60 min by using a 0.005-0.015C current constant current, or the cut-off voltage is 3.0V;
(2) charging the battery for 30-60 min by using a 0.02-0.08C current constant current, or the cut-off voltage is 3.2V;
(3) charging the battery for 30-60 min by using a 0.05-0.15C current constant current, or the cut-off voltage is 3.45V;
(4) the battery is placed for 8-24 h at a high temperature of 45-60 ℃.
Through the technical scheme, the invention has the beneficial effects that:
(1) according to the invention, the activated carbon is added into the anode powder material, and the activated carbon can effectively adsorb gas generated by decomposition of the battery under a high-temperature condition, so that the polarization phenomenon in the battery is reduced, and the high-temperature cycle performance of the battery is improved;
(2) the pre-formation method is beneficial to fully generating side reactions in the battery, forming a stable and compact SEI film, absorbing generated gas through activated carbon, and improving the flatness and uniformity of an electrode plate interface, thereby prolonging the cycle life of the lithium ion power battery and improving the safety performance of the battery at high temperature.
The high-temperature lithium ion power battery provided by the invention has the advantages that under the condition of 60 ℃, 1C charge and discharge are carried out, and after 1000 times of circulation, the capacity retention rate is more than or equal to 80%, and the high-temperature lithium ion power battery has high safety performance.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 discharge curves of the high-temperature type lithium ion power battery a1 of example 1 of the present invention at 0.2C and 1C.
Fig. 2 is a high temperature cycle performance curve of the high temperature type lithium ion power battery of example 1 of the present invention at 60 ℃.
Detailed Description
The following describes in detail specific embodiments of the present invention. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as specifically disclosed herein.
The invention provides a high-temperature lithium ion power battery which comprises a positive electrode, a negative electrode, electrolyte, a diaphragm, an insulating gasket, an insulating PE sleeve and a battery shell, wherein the positive electrode comprises positive electrode powder and an organic solvent, and the positive electrode powder comprises 92-95 wt% of positive electrode active substances, 1-3 wt% of activated carbon, 1-3 wt% of positive electrode conductive agents and 1-3 wt% of positive electrode adhesive agents. According to the invention, the activated carbon is added into the anode powder material, and the activated carbon can effectively adsorb gas generated by decomposition of the battery under a high-temperature condition, so that the polarization phenomenon in the battery is reduced, and the high-temperature cycle performance of the battery is improved.
In order to further increase the high temperature of the high temperature type lithium ion power battery, the positive electrode powder preferably comprises 92.2 wt% to 94.3 wt% of positive electrode active material (for example, 92.2 wt%, 92.5 wt%, 92.8 wt%, 93 wt%, 93.2 wt%, 93.5 wt%, 93.8 wt%, 94.3 wt%), 1.2 wt% to 2.5 wt% of activated carbon (for example, 1 wt%, 1.2 wt%, 1.8 wt%, 2 wt%, 2.3 wt%, 2.5 wt%, 3 wt%), 1 wt% to 3 wt% of conductive agent (for example, 1 wt%, 1.5 wt%, 2.5 wt%, 2.7 wt%, 3 wt%), 1 wt% to 3 wt% of binder (for example, 2.2 wt%, 2.3 wt%, 2.5 wt%, 2.7 wt%, 2.8 wt%, 3 wt%), and more specifically, the positive electrode powder comprises 93 wt% of positive electrode active material, 2 wt% of conductive agent, 3 wt% of conductive agent, 2 wt% of a binder; 93.5 wt% of positive electrode active material, 1.8 wt% of activated carbon, 2.2 wt% of conductive agent and 2.5 wt% of adhesive agent.
The active carbon has larger specific surface area and adsorption capacity, and can adsorb gas generated by the battery at high temperature in time, so that the polarization phenomenon of the battery electrode is reduced, and the cycle performance of the lithium ion power battery at high temperature is improved. Under the preferable condition, the specific surface area of the activated carbon is 500-1000 m2G (which may be 500m, for example)2/g、585m2/g、720m2/g、850m2In g or 1000m2(g) the pore diameter is 20-200A degrees.
The invention is suitable for the currently commonly used positive electrode active materials, and can be, for example: the positive active material is selected from a ternary composite material, lithium iron phosphate, lithium manganate and a lithium-rich manganese-based material. The inventors of the present invention found, in the course of extensive experiments, that the improvement of the high-temperature cycle performance of the lithium ion power battery by the activated carbon is greatest when the positive electrode active material is a ternary composite material, and therefore, the positive electrode active material in the present invention is preferably a ternary composite material, more preferably, the ternary composite material is LiNiaCobMn1-a-bO2Wherein 0.3 < a < 1, 0 < b < 0.6 and a + b < 1, more particularly, the ternary composite material is selected from the group consisting of LiNi0.5Mn0.2Co0.3O2、LiNi0.6Mn0.1Co0.3O2、LiNi0.4Mn0.3Co0.3O2、LiNi0.5Mn0.3Co0.2O2、LiNi0.6Mn0.2Co0.2O2、LiNi0.5Mn0.1Co0.4O2、LiNi0.4Mn0.2Co0.4O2、LiNi0.4Mn0.3Co0.3O2At least one of (1).
In the invention, the positive electrode conductive agent is at least two of KS (conductive graphite), graphene and carbon nanotubes, and under the preferable condition, the positive electrode conductive agent is prepared by mixing the carbon nanotubes and KS in a weight ratio of 1: 2, preparing a composition; the positive electrode binder is at least one of SBR (styrene butadiene rubber), CMC (carboxymethyl cellulose) and PAA (polyacrylic acid).
In a preferred embodiment of the present invention, the method for preparing the positive electrode comprises:
1. preparing glue: adding PVDF into NMP, and stirring at a high speed for 1.5-2.5 h to prepare glue with the content of 6-10%;
2. preparing positive electrode slurry: adding a conductive agent into the prepared glue, stirring at a high speed for 45-60 min, adding activated carbon, and stirring for 45-75 min; finally, adding a positive electrode material, stirring at a high speed for 2-4 h, and adding a solvent NMP to adjust solid content and viscosity to prepare positive electrode slurry;
3. preparing a positive plate: and (3) screening the positive electrode slurry by a 150-mesh sieve, then uniformly coating the positive electrode slurry on the front side and the back side of the current collector, drying, rolling, slitting and the like to prepare the positive electrode plate with the water content of less than or equal to 200 ppm.
Wherein, the current collector is an aluminum foil.
In the invention, the negative electrode comprises negative electrode powder and a solvent, the negative electrode powder comprises a negative electrode active material, a negative electrode conductive agent and a negative electrode binder, and the negative electrode active material is at least one selected from carbon materials, metal oxides, transition metal nitrides and alloys. Preferably, the negative electrode active material is a carbon material; further preferably, the carbon material is selected from at least one of artificial graphite, natural graphite, mesocarbon microbeads, petroleum coke, carbon fibers and pyrolytic resin carbon.
In the invention, the negative electrode conductive agent is at least two of conductive carbon black (SP), KS (conductive graphite) and graphene, and preferably, the negative electrode conductive agent is prepared from carbon nanotubes and KS in a weight ratio of 1: 1, preparing a composition; the negative binder is at least one of SBR (styrene butadiene rubber), CMC (carboxymethyl cellulose) and PAA (polyacrylic acid).
In a preferred embodiment of the present invention, the method for preparing the negative electrode comprises:
1. preparing glue: adding CMC into a proper amount of deionized water, and stirring at a high speed for 1.5-2.5 h to prepare glue with the content of 6-10%;
2. preparing anode slurry: adding a conductive agent into the prepared glue, stirring at a high speed for 0.5-1.5 h, adding a negative electrode material, stirring at a high speed for 3-5 h, adding an acrylic polymer, stirring at a high speed for 1h, adding a proper amount of deionized water to adjust solid content and viscosity, and preparing a negative electrode slurry;
3. preparing a negative plate: and (3) screening the negative electrode slurry by a 150-mesh sieve, then uniformly coating the negative electrode slurry on the front side and the back side of the current collector, and drying, rolling, slitting and the like to prepare the negative electrode sheet with the water content of less than or equal to 200 ppm.
Wherein, the current collector is an aluminum foil.
Preferably, the diaphragm is a ceramic diaphragm. The present invention has no particular requirement on the kind of the electrolyte, and can be known to those skilled in the art.
The assembling method of the high-temperature lithium ion power battery comprises the following steps: and welding positive and negative pole piece tabs, winding, encasing, grooving, injecting liquid and sealing the prepared positive pole piece, negative pole piece and diaphragm on a full-automatic machine.
The invention also provides a pre-formation method of the high-temperature lithium ion power battery, which comprises the following steps:
(1) charging the battery for 30-60 min by using a 0.005-0.015C current constant current, or the cut-off voltage is 3.0V;
(2) charging the battery for 30-60 min by using a 0.02-0.08C current constant current, or the cut-off voltage is 3.2V;
(3) charging the battery for 30-60 min by using a 0.05-0.15C current constant current, or the cut-off voltage is 3.45V;
(4) the battery is kept for 8-14 h at a high temperature of 45-60 ℃.
Preferably, the method comprises the following steps:
(1) charging the battery for 30-60 min by using a 0.01C current constant current, or the cut-off voltage is 3.0V;
(2) charging the battery for 30-60 min by using a 0.05C current constant current, or the cut-off voltage is 3.2V;
(3) charging the battery for 30-60 min by using a 0.1C current constant current, or the cut-off voltage is 3.45V;
(4) the battery is placed for 8-24 h at a high temperature of 45-60 ℃.
The pre-formation method is beneficial to fully generating side reactions in the battery, forming a stable and compact SEI film, and improving the flatness and uniformity of an electrode plate interface by absorbing generated gas through activated carbon, thereby improving the cycle life of the high-temperature lithium ion power battery and improving the safety performance of the battery at high temperature.
The present invention will be described in detail below by way of examples.
Example 1
1. Preparation of the positive electrode:
the positive electrode material consists of 93 wt% LiNi0.5Mn0.2Co0.3O22 wt% of activated carbon (specific surface area is about 765 m)2Per g, pore size of about 80 deg.C), 1 wt% carbon nanotubes, 3 wt% KS-6, 2 wt% PVDF.
(1) Preparing glue: adding PVDF into NMP, and stirring at high speed for 1.5h to obtain glue with the content of 8%;
(2) preparing positive electrode slurry: adding a conductive agent into the prepared glue, stirring at a high speed for 45min, adding activated carbon, and stirring for 60 min; finally, adding a positive electrode material, stirring at a high speed for 3 hours, and adding a solvent NMP to adjust solid content and viscosity to prepare positive electrode slurry;
(3) preparing a positive plate: and (3) screening the positive electrode slurry by a 150-mesh sieve, then uniformly coating the positive electrode slurry on the front side and the back side of the current collector, drying, rolling, slitting and the like to prepare the positive electrode sheet with the water content of less than or equal to 200 ppm.
2. Preparation of a negative electrode:
the negative electrode material consisted of 93.5 wt% mesocarbon microbeads (available from Shanghai Nayu trade Co., Ltd.), 1.5 wt% KS-6, 1.5 wt% SP, 2 wt% acrylic polymer.
(1) Preparing glue: adding CMC into a proper amount of deionized water, and stirring at a high speed for 1.5h to prepare glue with the content of 8%;
(2) preparing anode slurry: adding KS-6 and SP into prepared glue, adding a negative electrode material after stirring at a high speed for 1h, adding an acrylic polymer after stirring at a high speed for 4h, stirring at a high speed for 1h, and adding a proper amount of deionized water to adjust solid content and viscosity to prepare negative electrode slurry;
(3) preparing a negative plate: and (3) screening the negative electrode slurry by a 150-mesh sieve, then uniformly coating the negative electrode slurry on the front side and the back side of the current collector, and drying, rolling, slitting and the like to prepare the negative electrode sheet with the water content of less than or equal to 200 ppm.
3. Assembling the high-temperature lithium ion power battery: the ceramic diaphragm is a diaphragm;
and assembling the positive electrode, the negative electrode, the ceramic diaphragm and the electrolyte into a 18650 cylindrical power battery to obtain a high-temperature lithium ion power battery A1.
4. The pre-formation method of the lithium-ion power battery A1 comprises the following steps: the lithium ion power battery A1 is subjected to constant current charging for 30min at a current of 0.01C, then is subjected to constant current charging for 60min at a current of 0.05C, then is subjected to constant current charging for 60min at a current of 0.1C, and then is placed at a high temperature of 45 ℃ for 24 h.
The lithium ion power battery a1 prepared in this example had a discharge capacity of 3050mAh at 0.2C and 2910mAh at 1C, and the experimental results are shown in fig. 1.
The battery is subjected to 1C constant current charging at the high temperature of 60 ℃, then is subjected to constant voltage charging to 4.2V at 0.02C, and then is subjected to cyclic charging and discharging at the constant current discharging to 2.75V at 1C, the capacity retention rate after 1000 cycles is 85.6%, and the experimental result is shown in figure 2.
After full charge, the device can not be ignited or exploded under the test conditions of short circuit, overcharge and the like.
Example 2
1. The preparation method of the positive electrode is the same as that of example 1, except that the composition of the positive electrode material is as follows:
the positive electrode material consists of 93 wt% LiNi0.5Mn0.2Co0.3O23 wt% of activated carbon (specific surface area is about 765 m)2Per g, pore size about 80 deg.), 1 wt% carbon nanotubes, 1.5 wt% Ketjen black, 1.5 wt% PVDF.
2. The negative electrode was prepared in the same manner as in example 1, except that the composition of the negative electrode material was as follows:
the negative electrode material consists of 94 wt% of mesocarbon microbeads, 1.5 wt% of KS-6, 1.5 wt% of acetylene black, 1.4 wt% of CMC and 1.6 wt% of acrylic acid polymer.
3. The assembly method of the high-temperature lithium ion power battery was the same as that of example 1, and a high-temperature lithium ion power battery a2 was obtained.
4. The pre-formation method of the lithium-ion power battery A2 comprises the following steps: firstly, the lithium electronic power battery A2 is charged with a constant current of 0.01C until the voltage is 3.0V; then, the constant current charging is carried out by 0.05C current until the voltage is 3.2V; then charging the battery to 3.45V by using a 0.1C current constant current; and finally, the lithium ion power battery A2 is placed at a high temperature of 60 ℃ for 12 hours.
The discharge capacity of the lithium-ion power battery a2 prepared in this example was 3067mAh at 0.2C and 2953mAh at 1C.
The battery is subjected to 1C constant current charging at the high temperature of 60 ℃, then is subjected to constant voltage charging to 4.2V at 0.02C, and then is subjected to cyclic charging and discharging at the constant current discharging to 2.5V at 1C, and the capacity retention rate after 1000 cycles is about 83.9%.
After full charge, the device can not be ignited or exploded under the test conditions of short circuit, overcharge and the like.
Example 3
1. The preparation method of the positive electrode is the same as that of example 1, except that the composition of the positive electrode material is as follows:
the positive electrode material consists of 94 wt% LiNi0.5Mn0.2Co0.3O22 wt% of activated carbon (specific surface area about 765 m)2Per g, pore size of about 80 deg.C), 1 wt% carbon nanotubes, 1 wt% Ketjen black, 2 wt% PVDF.
2. The negative electrode was prepared in the same manner as in example 1, except that the composition of the negative electrode material was as follows:
the negative electrode material consists of 93 wt% of mesocarbon microbeads, 2 wt% of KS-6, 1 wt% of acetylene black, 2 wt% of CMC and 2 wt% of acrylic polymer.
3. The assembly method of the high-temperature lithium ion power battery was the same as that of example 1, and a high-temperature lithium ion power battery a3 was obtained.
4. The pre-formation method of the lithium-ion power battery A3 comprises the following steps: firstly, the lithium electronic power battery A3 is charged with a constant current of 0.01C until the voltage is 3.0V; then, the constant current charging is carried out by 0.05C current until the voltage is 3.2V; then charging the battery to 3.45V by using a 0.1C current constant current; and finally, the lithium ion power battery A3 is placed at a high temperature of 60 ℃ for 12 hours.
The lithium ion power battery a3 prepared in this example had a discharge capacity of 3054mAh at 0.2C and a discharge capacity of 2921mAh at 1C.
The battery is subjected to 1C constant current charging at the high temperature of 60 ℃, then is subjected to constant voltage charging to 4.2V at 0.05C, and then is subjected to cyclic charging and discharging at the constant current discharging to 2.75V at 1C, and the capacity retention rate after 1000 cycles is about 82.9%.
After full charge, the device can not be ignited or exploded under the test conditions of short circuit, overcharge and the like.
Example 4
1. The preparation method of the positive electrode is the same as that of example 1, except that the composition of the positive electrode material is as follows:
the positive electrode material consists of 95 wt% LiNi0.5Co0.3Mn0.2O21 wt% of activated carbon (specific surface area about 765 m)2Per g, pore size of about 80 deg.C), 1 wt% SP, 1 wt% Ketjen black, 2 wt% PVDF.
2. The negative electrode was prepared in the same manner as in example 1, except that the composition of the negative electrode material was as follows:
the negative electrode material consists of 92 wt% of mesocarbon microbeads, 1.5 wt% of SP, 1.5 wt% of acetylene black, 2.5 wt% of CMC and 2.5 wt% of acrylic polymer.
3. The assembly method of the high-temperature lithium ion power battery was the same as that of example 1, and a high-temperature lithium ion power battery a4 was obtained.
4. The pre-formation method of the lithium-ion power battery A4 comprises the following steps: firstly, the lithium electronic power battery A4 is charged with a constant current of 0.01C until the voltage is 3.0V; then, the constant current charging is carried out by 0.05C current until the voltage is 3.2V; then charging the battery to 3.45V by using a 0.1C current constant current; and finally, the lithium ion power battery A4 is placed at a high temperature of 60 ℃ for 12 hours.
The lithium ion power battery a4 prepared in this example had a discharge capacity of 3087mAh at 0.2C and 2968mAh at 1C.
The battery is subjected to 1C constant current charging at the high temperature of 60 ℃, then is subjected to constant voltage charging to 4.2V at 0.05C, and then is subjected to cyclic charging and discharging at the constant current discharging to 2.75V at 1C, and the capacity retention rate after 1000 cycles is about 82.6%.
After full charge, the device can not be ignited or exploded under the test conditions of short circuit, overcharge and the like.
Example 5
The process of example 1 was followed except that the composition of the positive electrode material was as follows:
the positive electrode material consists of 92.2 wt% of LiNi0.5Co0.3Mn0.2O22.5 wt% of activated carbon (specific surface area about 765 m)2Per g, pore size of about 80 deg.C), 1 wt% SP, 2 wt% Ketjen black, 2.3 wt% PVDF.
The lithium ion power battery a5 prepared in this example had a discharge capacity of 3021mAh at 0.2C and 2926mAh at 1C.
The battery is subjected to 1C constant current charging at the high temperature of 60 ℃, then is subjected to constant voltage charging to 4.2V at 0.05C, and then is subjected to cyclic charging and discharging at the constant current discharging to 2.75V at 1C, and the capacity retention rate after 1000 cycles is about 80.6%.
After full charge, the device can not be ignited or exploded under the test conditions of short circuit, overcharge and the like.
Example 6
The process of example 1 was followed except that the activated carbon had a specific surface area of about 585m2Per g, pore size is about 100.
The lithium ion power battery a6 prepared in this example had a discharge capacity of 3009mAh at 0.2C and 2915mAh at 1C.
The battery is subjected to 1C constant current charging at the high temperature of 60 ℃, then is subjected to constant voltage charging to 4.2V at 0.05C, and then is subjected to cyclic charging and discharging at the constant current discharging to 2.75V at 1C, and the capacity retention rate after 1000 cycles is about 80.1%.
After full charge, the device can not be ignited or exploded under the test conditions of short circuit, overcharge and the like.
Comparative example 1
The method of example 1 was followed except that the positive electrode material was composed of 94 wt% LiNi and no activated carbon was contained therein0.5Mn0.2Co0.3O22 wt% of activated carbon (specific surface area is about 765 m)2Per g, pore size about 80 ℃), 3% by weight of KS-6 and 2% by weight of PVDF.
The discharge capacity of the lithium-ion power battery B1 prepared in the embodiment is 2936mAh under the condition of 0.2C, and 2896mAh under the condition of 1C.
The battery is subjected to 1C constant current charging at the high temperature of 60 ℃, then is subjected to constant voltage charging of 0.05C to 4.2V, and then is subjected to cyclic charging and discharging of 1C constant current discharging to 2.75V, the capacity retention rate after 600 cycles is about 80%, and the experimental result is shown in figure 2.
After full charge, the device can not be ignited or exploded under the test conditions of short circuit, overcharge and the like.
The preferred embodiments of the present invention have been described in detail, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.

Claims (10)

1. A high-temperature lithium ion power battery comprises a positive electrode, a negative electrode, electrolyte, a diaphragm, an insulating gasket, an insulating PE sleeve and a battery shell, wherein the positive electrode comprises positive electrode powder and an organic solvent, and is characterized in that the positive electrode powder comprises 92-95 wt% of positive electrode active substances, 1-3 wt% of activated carbon, 1-3 wt% of positive electrode conductive agents and 1-3 wt% of positive electrode adhesive agents; the specific surface area of the activated carbon is 500-1000 m2The aperture is 20-200A degrees;
the positive active material is at least one selected from a ternary composite material, lithium iron phosphate, lithium manganate and a lithium-rich manganese-based material.
2. The high-temperature lithium ion power battery as claimed in claim 1, wherein the positive electrode powder comprises 92.2-94.3 wt% of positive electrode active material, 1.2-2.5 wt% of activated carbon, 1-3 wt% of conductive agent and 1-3 wt% of adhesive agent.
3. A high temperature lithium ion power cell according to claim 2, wherein the positive electrode active material is a ternary composite material.
4. The high temperature lithium ion power cell of claim 3, wherein the ternary composite material is LiNiaCobMn1-a-bO2Wherein a is more than 0.3 and less than 1, b is more than 0 and less than 0.6, and a + b1。
5. The high temperature type lithium ion power battery according to claim 3 or 4, wherein the negative electrode comprises a negative electrode powder and a solvent, the negative electrode powder comprises a negative electrode active material, a negative electrode conductive agent, and a negative electrode binder, wherein the negative electrode active material is at least one selected from the group consisting of a carbon material, a metal oxide, a transition metal nitride, and an alloy.
6. A high temperature type lithium ion power cell according to claim 5, wherein the negative electrode active material is a carbon material.
7. The high temperature lithium ion power cell of claim 6, wherein the carbon material is selected from at least one of artificial graphite, natural graphite, mesocarbon microbeads, petroleum coke, carbon fibers, and pyrolytic resin carbon.
8. The high temperature lithium ion power cell of claim 1, wherein the separator is a ceramic separator.
9. The pre-formation method of the high-temperature lithium ion power battery according to any one of claims 1 to 8, comprising the steps of:
(1) charging the battery for 30-60 min by using a 0.005-0.015C current constant current, or the cut-off voltage is 3.0V;
(2) charging the battery for 30-60 min by using a 0.02-0.08C current constant current, or the cut-off voltage is 3.2V;
(3) charging the battery for 30-60 min by using a 0.05-0.15C current constant current, or the cut-off voltage is 3.45V;
(4) the battery is placed for 8-24 h at a high temperature of 45-60 ℃.
10. The pre-formation method of the high-temperature lithium ion power battery according to claim 9, characterized by comprising the following steps:
(1) charging the battery for 30-60 min by using a 0.01C current constant current, or the cut-off voltage is 3.0V;
(2) charging the battery for 30-60 min by using a 0.05C current constant current, or the cut-off voltage is 3.2V;
(3) charging the battery for 30-60 min by using a 0.1C current constant current, or the cut-off voltage is 3.45V;
(4) the battery is placed for 8-24 h at a high temperature of 45-60 ℃.
CN201811247409.8A 2018-10-25 2018-10-25 High-temperature lithium ion power battery and pre-formation method thereof Active CN109411759B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811247409.8A CN109411759B (en) 2018-10-25 2018-10-25 High-temperature lithium ion power battery and pre-formation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811247409.8A CN109411759B (en) 2018-10-25 2018-10-25 High-temperature lithium ion power battery and pre-formation method thereof

Publications (2)

Publication Number Publication Date
CN109411759A CN109411759A (en) 2019-03-01
CN109411759B true CN109411759B (en) 2022-04-05

Family

ID=65469690

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811247409.8A Active CN109411759B (en) 2018-10-25 2018-10-25 High-temperature lithium ion power battery and pre-formation method thereof

Country Status (1)

Country Link
CN (1) CN109411759B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113054190A (en) * 2019-12-26 2021-06-29 北京宝沃汽车股份有限公司 Method for reducing gas generation of battery

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101937982A (en) * 2009-06-30 2011-01-05 比亚迪股份有限公司 Cathode material and battery containing same

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0789487B2 (en) * 1986-12-25 1995-09-27 松下電器産業株式会社 Cadmium electrode for alkaline storage battery and manufacturing method thereof
CN104064371B (en) * 2014-06-20 2017-07-07 四川能宝电源制造有限公司 For the Ni/C anode sizing agents and anode pole piece preparation method of super capacitance cell
CN104638311B (en) * 2015-03-11 2017-03-08 浙江中科立德新材料有限公司 Water system lithium iron battery chemical synthesizing method
CN106654253A (en) * 2017-01-04 2017-05-10 江苏金坛绿能新能源科技有限公司 High-energy-density lithium ion power battery and preparation method therefor
CN107706361A (en) * 2017-08-14 2018-02-16 宁波维科新能源科技有限公司 A kind of ternary compound potassium ion electrokinetic cell
CN108155381A (en) * 2017-12-25 2018-06-12 北京国能电池科技有限公司 Lithium cell cathode material, lithium ion battery suitable for start and stop power supply and preparation method thereof

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101937982A (en) * 2009-06-30 2011-01-05 比亚迪股份有限公司 Cathode material and battery containing same

Also Published As

Publication number Publication date
CN109411759A (en) 2019-03-01

Similar Documents

Publication Publication Date Title
CN110660965B (en) Negative plate and preparation method thereof, lithium ion battery and preparation method and application thereof
CN110690436A (en) Negative electrode material, preparation method thereof, prepared negative electrode plate and lithium ion battery
CN102694158A (en) Silicon-containing lithium cathode, preparation method thereof and lithium sulfur battery with silicon-containing lithium cathode
CN105449269B (en) A kind of lithium ion battery
CN113066962B (en) Silicon-containing negative plate and high-energy-density battery
CN111799470B (en) Positive pole piece and sodium ion battery
CN114552125B (en) Nondestructive lithium supplement composite diaphragm and preparation method and application thereof
CN115566255B (en) Secondary battery and electric equipment
CN114665065A (en) Positive pole piece and preparation method and application thereof
CN114023965A (en) Solid state lithium battery
CN110808403A (en) Overcharge-preventing lithium ion battery
CN112290080A (en) Lithium ion battery capable of being charged at low temperature
CN103762335A (en) Lithium titanate electrode plate and lithium ion battery
CN112151755A (en) Positive plate and battery
CN113328098A (en) Negative plate and lithium ion battery comprising same
CN110190258B (en) Silicon-carbon composite material water-based composite slurry, preparation method thereof and lithium ion battery
CN110993901A (en) Low-internal-resistance quick-charging and quick-discharging lithium ion power battery
CN110867581A (en) High-voltage high-energy-density quick-charging soft-package lithium ion battery
CN107785537B (en) Novel lithium ion battery positive pole piece, application thereof and modification method of pole piece
CN109411759B (en) High-temperature lithium ion power battery and pre-formation method thereof
CN116387447A (en) Lithium ion battery fast-charge negative plate, electrochemical device and electronic device
CN109273670B (en) Metal lithium cathode with high-specific-surface-area mesoporous protective film and preparation method thereof
JPH07211320A (en) Positive mix and battery using the same
JP5890715B2 (en) Positive electrode for non-aqueous electrolyte secondary battery and non-aqueous electrolyte secondary battery
CN111105938A (en) Lithium pre-embedding method for negative electrode of lithium ion super capacitor

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
CP03 Change of name, title or address
CP03 Change of name, title or address

Address after: 226200 No.306 Heping South Road, Huilong Town, Qidong City, Nantong City, Jiangsu Province

Patentee after: Jiangsu haisida power supply Co.,Ltd.

Address before: 226200 Nantong City, Jiangsu Province 306 Heping South Road, Huilong Town, Qidong City, Jiangsu Province

Patentee before: JIANGSU HIGHSTAR BATTERY MANUFACTURING Co.,Ltd.