CN115621425A - Lithium ion battery silicon-based negative electrode pre-lithiation method and use method of pre-lithiation negative electrode - Google Patents
Lithium ion battery silicon-based negative electrode pre-lithiation method and use method of pre-lithiation negative electrode Download PDFInfo
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- 238000006138 lithiation reaction Methods 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 41
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 27
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 26
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title claims abstract description 15
- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 15
- 239000010703 silicon Substances 0.000 title claims abstract description 15
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 54
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 54
- 239000012300 argon atmosphere Substances 0.000 claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 12
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical compound [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 239000010439 graphite Substances 0.000 claims description 4
- 229910002804 graphite Inorganic materials 0.000 claims description 4
- 239000005543 nano-size silicon particle Substances 0.000 claims description 4
- QHGJSLXSVXVKHZ-UHFFFAOYSA-N dilithium;dioxido(dioxo)manganese Chemical compound [Li+].[Li+].[O-][Mn]([O-])(=O)=O QHGJSLXSVXVKHZ-UHFFFAOYSA-N 0.000 claims description 3
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 claims description 3
- 230000000052 comparative effect Effects 0.000 description 23
- 230000000694 effects Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 238000004146 energy storage Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000010405 anode material Substances 0.000 description 2
- 239000010406 cathode material Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000002210 silicon-based material Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000002000 Electrolyte additive Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011887 silicon containing negative electrode material Substances 0.000 description 1
- 239000011856 silicon-based particle Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
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- 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
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
- H01M4/1391—Processes of manufacture of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
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- 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
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- 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
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- 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
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- 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
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
- H01M4/1393—Processes of manufacture of electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
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- 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
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
- H01M4/1395—Processes of manufacture of electrodes based on metals, Si or alloys
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Abstract
A pre-lithiation method for a silicon-based negative electrode of a lithium ion battery comprises the following steps: (1) Placing the dried negative pole piece in a glove box in an argon atmosphere; (2) The circuit board, the resistor, the lead and the switch form a pre-lithiation external circuit device; placing a pre-lithiation external circuit device in the glove box; (3) In a glove box in argon atmosphere, a lithium sheet and a negative electrode sheet are used as counter electrodes to manufacture a button type half cell; (4) Connecting the button type half cell into a pre-lithiation external circuit device to form a short circuit for pre-lithiation; the short circuit holding time is less than or equal to 40min, and the prelithiation is completed. The use method of the prelithiation negative electrode comprises the following steps: (1) Assembling the pre-lithiated negative electrode and the positive electrode plate into a lithium battery in a glove box in an argon atmosphere; and (2) standing the assembled lithium battery for less than or equal to 3 hours. The method of the invention enables the lithium battery composed of the obtained negative electrode to have the advantages of high first efficiency, good rate capability and safety performance, long service life, high capacity density and the like in the pre-lithiation process.
Description
Technical Field
The invention relates to the technical field of manufacturing of high-energy-density lithium ion batteries, in particular to a pre-lithiation method for a silicon-based negative electrode of a lithium ion battery and a using method for the pre-lithiation negative electrode.
Background
Lithium ion batteries are the most mature energy storage and conversion devices in the current technology, and have been widely used in 3C products such as mobile phones, computers, cameras and the like since the realization of commercialization by sony corporation in japan in the last 90 s. Nowadays, lithium ion batteries cover the aspects of mobile energy storage in our lives, and are widely applied as the heart of electric automobiles and various large-scale machines besides portable equipment. In addition, with the rapid development of communication technology, in recent years, the wireless communication system also has been widely applied to various internet of things terminals such as 5G communication base stations, data center energy storage equipment, smart home appliances and unmanned aerial vehicles, so that the market of lithium ion batteries is further expanded, and the rapid development of the lithium ion battery technology is promoted. However, the energy density and the charging rate of the lithium ion battery meet the technical bottleneck at present, and the higher requirements of the energy of the power battery on the energy density and the endurance mileage are difficult to meet, so how to improve the volume energy density and the mass energy density of the lithium battery and the charging and discharging efficiency become the key breakthrough direction of the high-performance lithium ion battery.
For the research of a high-capacity lithium ion battery system, a battery containing a silicon cathode has high energy density, but the capacity of the battery is reduced faster than that of a conventional graphite cathode battery. The capacity attenuation of the silicon-containing negative electrode material has a plurality of influence factors, and the continuous expansion and pulverization of silicon particles and the formation of a fresh electrode-electrolyte interface cause the formation of a continuous SEI film on the surface of a negative electrode to consume a large amount of active lithium, thereby causing the polarization of the negative electrode. In the face of the problems, researchers provide improved schemes such as silicon material structure design, electrolyte additive and anode material matching, and the like, so that the stability of the full cell system is improved to a certain extent, and the problem of cell capacity attenuation is restrained to a certain extent; however, it is still difficult to solve the core problem of active lithium loss due to the continuous formation of the SEI film in the first charge and discharge and subsequent cycles. Therefore, the lithium supplementing technology based on the silicon-based material is a very necessary work, and has great guiding significance for the practical application of the novel silicon-based full battery.
Disclosure of Invention
The invention aims to provide a method for pre-lithiating a silicon-based negative electrode of a lithium ion battery and a use method of the pre-lithiated negative electrode.
The invention relates to a pre-lithiation method for a silicon-based negative electrode of a lithium ion battery, which comprises the following steps of:
(1) Placing the dried negative pole piece in a glove box in an argon atmosphere; the negative pole piece is made of a graphite negative pole, a nano-silicon negative pole or a silicon monoxide negative pole; the negative pole piece is circular, and the diameter of the negative pole piece is 12-18 mm;
(2) The circuit board, the resistor, the lead and the switch form a pre-lithiation external circuit device; placing a pre-lithiation external circuit device in the glove box; the resistor of the pre-lithiation external circuit device is a fixed resistance resistor or a variable resistance resistor;
(3) In a glove box in an argon atmosphere, a lithium sheet and a negative pole piece are used as counter electrodes to manufacture a button type half cell; the lithium sheet is circular, the diameter of the lithium sheet is 12-18 mm, and the thickness of the lithium sheet is 0.2-0.5 mm;
(4) And (3) connecting the button half cell into a pre-lithiation external circuit device to form a short circuit for pre-lithiation, wherein the short circuit holding time is less than or equal to 40min, and completing the pre-lithiation to enable the negative pole piece to form a pre-lithiation negative pole.
In the step (1), the thickness of the negative electrode plate is 100 to 200 μm.
In the step (2), the resistance value of the external resistor is 1 to 100 Ω.
In the step (3), the lithium sheet is made of metal lithium with purity not less than 99.99%.
In the step (4), after the pre-lithiation is completed, the button type half cell is detached from the pre-lithiation external circuit device, and then the pre-lithiation negative electrode is detached from the button type half cell to obtain the pre-lithiation negative electrode.
The use method of the prelithiation negative electrode comprises the following steps:
(1) Assembling the pre-lithiated negative electrode and the positive electrode plate into a lithium battery in a glove box in an argon atmosphere;
(2) And standing the assembled lithium battery for less than or equal to 3 hours.
In the use method, the positive pole piece is made of a lithium iron phosphate material, a lithium cobaltate material, a lithium manganate material or a lithium nickelate material; the thickness of the positive pole piece is 100-200 μm; the positive pole piece is circular and has a diameter of 12-18 mm.
In the using method, the specific capacity of the positive pole piece is 100-300 mAh/g.
Compared with the prior art, the method provided by the invention has the advantages that the lithium battery composed of the obtained negative electrode has high first efficiency, good rate capability and safety performance, long service life, high capacity density and the like through the pre-lithiation process.
The principle of the invention is that in the process of short circuit of the anode and the cathode, an SEI film is formed on the surface of the cathode material, the prelithiated cathode material is taken out from the half cell and assembled with the anode material into a full cell, and the full cell is kept stand, so that the obtained lithium extracted from the anode of the lithium battery can not be consumed to form the SEI film, thereby reducing the irreversible capacity and improving the first efficiency and the capacity of the battery.
Drawings
FIG. 1 is a circuit diagram of a pre-lithiation method for a silicon-based negative electrode of a lithium ion battery according to the present invention; in the figure, (1) is a sensitive ammeter, (2) is a constant value resistor or a slide rheostat, (3) is a circuit switch, and (4) is a pre-lithiation device;
FIG. 2 is a specific capacity-voltage graph of examples 1 to 2 of the present invention and comparative example 1; in the figure, ■ is example 1, ● is example 2, a is comparative example 1;
FIG. 3 is a specific capacity-voltage graph of examples 1 to 2 of the present invention and comparative examples 1 to 2; in the figure, ■ is example 1, ● is example 2, a-solidup is comparative example 1, and diamond-solid is comparative example 2;
FIG. 4 is a specific capacity-voltage graph of examples 1 to 2 of the present invention and comparative examples 1 and 3; in the figure, ■ is example 1, ● is example 2, a-solidup is comparative example 1, and diamond-solid is comparative example 3.
Detailed Description
Embodiments of the present application will now be described in detail with reference to the following examples, which are intended to be illustrative of the present application and should not be construed as limiting the scope of the present application. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
In order to further understand the present invention, the method for prelithiating the negative electrode of the lithium ion battery and the method for preparing the lithium ion battery provided by the present invention are described in detail below with reference to the following examples, and the scope of the present invention is not limited by the following examples.
Example 1
Placing the dried negative pole piece in a glove box in an argon atmosphere; the negative pole piece is made of a silicon monoxide negative pole; the negative pole piece is circular and has a diameter of 12mm; the thickness of the negative pole piece is 100 mu m;
the circuit board, the resistor, the lead and the switch form a pre-lithiation external circuit device, and the result is shown in figure 2; placing a pre-lithiation external circuit device in the glove box; the resistor of the pre-lithiation external circuit device is a fixed resistance resistor; the resistance value of the external resistor is 50 omega;
in a glove box in argon atmosphere, a lithium sheet and a negative electrode sheet are used as counter electrodes to manufacture a button type half cell; the lithium sheet is circular, the diameter of the lithium sheet is 12mm, and the thickness of the lithium sheet is 0.2mm; the lithium sheet is made of metal lithium with the purity of more than or equal to 99.99 percent;
connecting the button half cell into a pre-lithiation external circuit device to form a short circuit for pre-lithiation, keeping the short circuit for 20min, completing pre-lithiation, and enabling a negative pole piece to form a pre-lithiation negative pole;
after the pre-lithiation is finished, removing the button type half cell from the pre-lithiation external circuit device, and then removing the pre-lithiation cathode from the button type half cell to obtain a pre-lithiation cathode;
the use method of the prelithiation negative electrode comprises the following steps:
assembling the pre-lithiated negative electrode and the positive electrode plate into a lithium battery in a glove box in an argon atmosphere;
standing the assembled lithium battery for 60min;
the positive pole piece is made of lithium iron phosphate material and is assembled into a 2025 button lithium battery; the thickness of the positive pole piece is 100 mu m; the positive pole piece is circular and has a diameter of 12mm; the specific capacity of the positive pole piece is 157mAh/g;
the detection results are shown in fig. 3 and 4.
Example 2
Example 2
The method is the same as example 1, except that:
(1) The resistance value of the external resistor is 100 omega;
(2) Short circuit retention time 40min;
(3) The specific capacity of the positive pole piece is 160mAh/g;
the detection results are shown in fig. 3 and 4.
Example 3
Example 3
The method is the same as example 1, except that:
(1) The negative pole piece is made of a graphite negative pole; the negative pole piece is circular, and the diameter of the negative pole piece is 14mm; the thickness of the negative pole piece is 140 micrometers;
(2) The resistor of the pre-lithiation external circuit device is a fixed resistance resistor; the resistance value of the external resistor is 60 omega;
(3) The lithium sheet is circular, the diameter of the lithium sheet is 14mm, and the thickness of the lithium sheet is 0.3mm;
(4) Short circuit is kept for 25min, and pre-lithiation is completed;
the using method is different from that of the embodiment 1 in that:
(1) Standing the assembled lithium battery for 120min;
(2) The positive pole piece is made of lithium cobaltate material; the thickness of the positive pole piece is 140 μm; the positive pole piece is circular, and the diameter of the positive pole piece is 14mm; the specific capacity of the positive pole piece is 176mAh/g.
Example 4
The method is the same as example 1, except that:
(1) The negative pole piece is made of a nano silicon negative pole; the negative pole piece is circular and has the diameter of 16mm; the thickness of the negative pole piece is 180 μm;
(2) (ii) a The resistance of the pre-lithiation external circuit device is a fixed resistance value resistance; the resistance value of the external resistor is 80 omega;
(3) The lithium sheet is circular, the diameter of the lithium sheet is 15mm, and the thickness of the lithium sheet is 0.4mm;
(4) Short circuit is kept for 30min, and pre-lithiation is completed;
the using method is different from that of the embodiment 1 in that:
(1) Standing the assembled lithium battery for 150min;
(2) The positive pole piece is made of lithium manganate material; the thickness of the positive pole piece is 180 mu m; the positive pole piece is circular and has the diameter of 16mm; the specific capacity of the positive pole piece is 118mAh/g.
Example 5
The method is the same as example 1, except that:
(1) The negative pole piece is made of a nano silicon negative pole; the negative pole piece is circular and has the diameter of 18mm; the thickness of the negative pole piece is 200 μm;
(2) The resistor of the pre-lithiation external circuit device is a fixed resistance resistor; the resistance value of the external resistor is 70 omega;
(3) The lithium sheet is circular, the diameter of the lithium sheet is 18mm, and the thickness of the lithium sheet is 0.5mm;
(4) Short circuit is kept for 35min, and pre-lithiation is completed;
the using method is different from that of the embodiment 1 in that:
(1) Standing the assembled lithium battery for 180min;
(2) The positive pole piece is made of lithium nickelate material; the thickness of the positive pole piece is 200 mu m; the positive pole piece is circular and has the diameter of 18mm; the specific capacity of the positive pole piece is 275mAh/g.
Comparative example 1
A button cell of 2025 was prepared using a non-prelithiated negative electrode piece of silicon monoxide and tested.
Comparative example 2
The difference from example 1 is that 150 Ω was used to customize the resistance.
Comparative example 3
The difference from example 1 is that the half-cell thus produced was placed in a prelithiation external circuit device and allowed to stand (short-circuiting time) for 60min.
Evaluation of comparative examples 1 to 3 and examples 1 to 2:
1. comparing the coulomb efficiency of the button cell obtained in examples 1-2 with that of comparative examples 1-2, it can be seen from fig. 1 that the first coulomb efficiency of the button cell pre-lithiated by the negative electrode is obviously improved compared with the first coulomb efficiency of the button cell not pre-lithiated by the negative electrode, so that the method of the present invention can obviously improve the first coulomb efficiency of the lithium ion battery;
2. comparing the coulomb efficiency of the button cell obtained in the examples 1-2 with that of the comparative examples 1-2, it can be known from fig. 2 that the prelithiation effect is obvious under the condition that the external resistance is 50 Ω and 100 Ω in the examples 1-2, and the prelithiation effect of the comparative example 2 is similar to the first coulomb efficiency of the comparative example 1 without the negative electrode prelithiation, which shows that the prelithiation effect is obvious when the external resistance is too large, the self-discharge current is too small, the prelithiation can not be realized, so the external resistance of 1-100 Ω is selected;
3. comparing the coulombic efficiencies of the button cell obtained in examples 1-2 and comparative examples 1-3, it can be known from fig. 3 that the prelithiation effect is obvious under the condition that the external resistance is 50 Ω and 100 Ω in examples 1-2, and the prelithiation effect of comparative example 3 is too high as compared with the first coulombic efficiencies of comparative example 1 without the negative electrode prelithiation and examples 1-2 with the negative electrode prelithiation, and the first discharge specific capacity of the prelithiation effect is far lower than that of the button cell prepared in comparative example 1 without the negative electrode prelithiation, so as to cause the prelithiation, thereby indicating that the prelithiation time adopted by the invention can effectively improve the coulombic efficiency, and the overlong prelithiation time can cause the prelithiation and cause negative effects on the lithium ion cell;
table one shows the first charge-discharge specific capacity and the first coulombic efficiency of examples 1 to 2 and comparative example 1:
the first specific charge-discharge capacity and the first coulombic efficiency of examples 1 to 2 and comparative examples 1 to 2 are shown.
Table one specific charge-discharge capacity for the first time and the first coulombic efficiency for examples 1 to 2 and comparative examples 1 and 3:
in conclusion, the embodiment can effectively improve the first coulomb efficiency of the lithium ion battery and improve the energy density of the lithium ion battery.
The above description of the embodiments is only intended to facilitate the understanding of the method of the invention and its core idea. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall into the protection scope of the claims of the present invention.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A pre-lithiation method for a silicon-based negative electrode of a lithium ion battery is characterized by comprising the following steps of:
(1) Placing the dried negative pole piece in a glove box in an argon atmosphere; the negative pole piece is made of a graphite negative pole, a nano silicon negative pole or a silicon monoxide negative pole; the negative pole piece is circular and has a diameter of 12-18 mm;
(2) The circuit board, the resistor, the lead and the switch form a pre-lithiation external circuit device; placing a pre-lithiation external circuit device in the glove box; the resistor of the pre-lithiation external circuit device is a fixed resistance resistor or a variable resistance resistor;
(3) In a glove box in argon atmosphere, a lithium sheet and a negative electrode sheet are used as counter electrodes to manufacture a button type half cell; the lithium sheet is circular, the diameter of the lithium sheet is 12-18 mm, and the thickness of the lithium sheet is 0.2-0.5 mm;
(4) And (3) connecting the button half cell into a pre-lithiation external circuit device to form a short circuit for pre-lithiation, wherein the short circuit is kept for less than or equal to 40min, so that pre-lithiation is completed, and a negative pole piece forms a pre-lithiation negative pole.
2. The method for prelithiation of a silicon-based negative electrode of a lithium ion battery according to claim 1, wherein in step (1), the thickness of the negative electrode sheet is 100-200 μm.
3. The method for prelithiation of a silicon-based negative electrode of a lithium ion battery according to claim 1, wherein in step (2), the resistance of the external resistor is 1-100 Ω.
4. The method for prelithiation of a silicon-based negative electrode of a lithium ion battery according to claim 1, wherein in step (3), the lithium sheet is made of metallic lithium having a purity of not less than 99.99%.
5. The method for prelithiation of silicon-based negative electrode of lithium ion battery according to claim 1, wherein in step (4), after prelithiation is completed, the button-type half cell is removed from the external circuit device for prelithiation, and then the prelithiation negative electrode is removed from the button-type half cell to obtain the prelithiation negative electrode.
6. The use method of the prelithiation negative electrode prepared by the prelithiation method of the silicon-based negative electrode of the lithium ion battery, as recited in claim 1, is characterized by comprising the following steps:
(1) Assembling the pre-lithiated negative electrode and the positive electrode plate into a lithium battery in a glove box in an argon atmosphere;
(2) And standing the assembled lithium battery for less than or equal to 3 hours.
7. The use method of the prelithiated negative electrode according to claim 6, wherein the positive electrode plate is made of lithium iron phosphate material, lithium cobaltate material, lithium manganate material or lithium nickelate material; the thickness of the positive pole piece is 100-200 μm; the positive pole piece is circular, and the diameter of the positive pole piece is 12-18 mm.
8. The use method of the pre-lithiated negative electrode according to claim 6, wherein the specific capacity of the positive electrode sheet is 100 to 300mAh/g.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20170058798A (en) * | 2015-11-19 | 2017-05-29 | 한국과학기술원 | Method, apparatus for pre―lithiation of electrode comprising silicon or silicon oxide, and lithium battery comprising the electrode |
| CN107464919A (en) * | 2017-09-12 | 2017-12-12 | 合肥国轩高科动力能源有限公司 | A kind of method of prelithiation lithium ion battery negative electrode |
| CN108123101A (en) * | 2016-11-29 | 2018-06-05 | 中国科学院大连化学物理研究所 | A kind of carbon group material using prelithiation does the lithium-sulfur cell and preparation method of cathode |
| CN109524621A (en) * | 2017-09-18 | 2019-03-26 | 浙江工业大学 | A kind of prelithiation method and device for the lithium ion battery negative electrode that prelithiation degree is controllable |
| CN112750984A (en) * | 2021-01-06 | 2021-05-04 | 西北工业大学 | Preparation method and use method of intermediate buffer film of pre-lithiation lithium ion battery silicon-based negative electrode |
| CN112786971A (en) * | 2021-02-04 | 2021-05-11 | 湖南立方新能源科技有限责任公司 | Preparation method of negative electrode pre-lithiation lithium ion battery and negative electrode pre-lithiation lithium ion battery |
-
2022
- 2022-08-09 CN CN202210951898.5A patent/CN115621425A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20170058798A (en) * | 2015-11-19 | 2017-05-29 | 한국과학기술원 | Method, apparatus for pre―lithiation of electrode comprising silicon or silicon oxide, and lithium battery comprising the electrode |
| CN108123101A (en) * | 2016-11-29 | 2018-06-05 | 中国科学院大连化学物理研究所 | A kind of carbon group material using prelithiation does the lithium-sulfur cell and preparation method of cathode |
| CN107464919A (en) * | 2017-09-12 | 2017-12-12 | 合肥国轩高科动力能源有限公司 | A kind of method of prelithiation lithium ion battery negative electrode |
| CN109524621A (en) * | 2017-09-18 | 2019-03-26 | 浙江工业大学 | A kind of prelithiation method and device for the lithium ion battery negative electrode that prelithiation degree is controllable |
| CN112750984A (en) * | 2021-01-06 | 2021-05-04 | 西北工业大学 | Preparation method and use method of intermediate buffer film of pre-lithiation lithium ion battery silicon-based negative electrode |
| CN112786971A (en) * | 2021-02-04 | 2021-05-11 | 湖南立方新能源科技有限责任公司 | Preparation method of negative electrode pre-lithiation lithium ion battery and negative electrode pre-lithiation lithium ion battery |
Non-Patent Citations (4)
| Title |
|---|
| DAE IN LEE等: ""Optimal Condition of Solid-Electrolyte-Interphase Prepared by Controlled Prelithiation for High Performance Li-Ion Batteries"", 《JOURNAL OF THE ELECTROCHEMICAL SOCIETY》, vol. 166, no. 4, 12 March 2019 (2019-03-12), pages 787 * |
| 白杨芝等: ""硅基负极材料预锂化技术研究进展"", 《电池》, vol. 52, no. 1, 28 February 2022 (2022-02-28), pages 101 - 104 * |
| 蒋江民等: ""预嵌锂用穿孔集流体对锂离子电容器电化学性能的影响"", 《物理化学学报》, vol. 33, no. 04, 15 April 2017 (2017-04-15), pages 780 - 786 * |
| 蔡满园等: ""以预锂化多壁碳纳米管为负极的锂离子电容器性能"", 《材料工程》, vol. 47, no. 05, 15 May 2019 (2019-05-15), pages 145 - 152 * |
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