CN209217115U - A kind of lithium ion cell electrode interval prelithiation device - Google Patents
A kind of lithium ion cell electrode interval prelithiation device Download PDFInfo
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- CN209217115U CN209217115U CN201822227435.6U CN201822227435U CN209217115U CN 209217115 U CN209217115 U CN 209217115U CN 201822227435 U CN201822227435 U CN 201822227435U CN 209217115 U CN209217115 U CN 209217115U
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- Prior art keywords
- pole piece
- lithium
- prelithiation
- lithium ion
- battery
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- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 25
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 38
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000002184 metal Substances 0.000 claims abstract description 23
- 229910052751 metal Inorganic materials 0.000 claims abstract description 22
- 239000003960 organic solvent Substances 0.000 claims abstract description 10
- 230000005684 electric field Effects 0.000 claims abstract description 8
- 229910003002 lithium salt Inorganic materials 0.000 claims abstract description 7
- 159000000002 lithium salts Chemical class 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 abstract description 17
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 6
- 230000005518 electrochemistry Effects 0.000 abstract description 4
- 238000007654 immersion Methods 0.000 description 5
- 239000002904 solvent Substances 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 229910001290 LiPF6 Inorganic materials 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 229910003473 lithium bis(trifluoromethanesulfonyl)imide Inorganic materials 0.000 description 3
- 229910001486 lithium perchlorate Inorganic materials 0.000 description 3
- QSZMZKBZAYQGRS-UHFFFAOYSA-N lithium;bis(trifluoromethylsulfonyl)azanide Chemical compound [Li+].FC(F)(F)S(=O)(=O)[N-]S(=O)(=O)C(F)(F)F QSZMZKBZAYQGRS-UHFFFAOYSA-N 0.000 description 3
- 150000002825 nitriles Chemical class 0.000 description 3
- 238000002161 passivation Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000007772 electrode material Substances 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 150000002170 ethers Chemical class 0.000 description 2
- 229910001540 lithium hexafluoroarsenate(V) Inorganic materials 0.000 description 2
- MHCFAGZWMAWTNR-UHFFFAOYSA-M lithium perchlorate Chemical compound [Li+].[O-]Cl(=O)(=O)=O MHCFAGZWMAWTNR-UHFFFAOYSA-M 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000007784 solid electrolyte Substances 0.000 description 2
- 150000003457 sulfones Chemical class 0.000 description 2
- 229910013188 LiBOB Inorganic materials 0.000 description 1
- 229910010941 LiFSI Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical class OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910001496 lithium tetrafluoroborate Inorganic materials 0.000 description 1
- VDVLPSWVDYJFRW-UHFFFAOYSA-N lithium;bis(fluorosulfonyl)azanide Chemical compound [Li+].FS(=O)(=O)[N-]S(F)(=O)=O VDVLPSWVDYJFRW-UHFFFAOYSA-N 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Classifications
-
- 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
- Battery Electrode And Active Subsutance (AREA)
- Secondary Cells (AREA)
Abstract
The utility model discloses a kind of lithium ion cell electrode interval prelithiation devices, including two pieces of backing plates being oppositely arranged, metal lithium bands are fixed on the inside of one of backing plate, it is fixed on the inside of another piece of backing plate using treated the battery pole piece of the organic solvent humidifying containing lithium salts, and metal lithium bands and battery pole piece are in close contact, and one piece is respectively arranged on the outside of two pieces of backing plates for providing the pole plate of extra electric field.The utility model can be using forming a uniform pole piece of prelithiation under the method collective effect of physical contact method and electrochemistry, so as to produce high capacity, high circulation, high magnification and the excellent lithium ion battery of security performance.
Description
Technical field
The utility model belongs to electrochemical field, and in particular to a kind of lithium ion cell electrode interval prelithiation device.
Background technique
Lithium ion battery is that a kind of have many characteristics, such as that high voltage, energy density are high, have extended cycle life and have a safety feature
Portable environmental-protection battery is widely used for the portable electronic devices such as mobile phone, video recorder, tablet computer and in electronic vapour at present
Vehicle field has also obtained certain application.But with the micromation of portable electronic device and electric car (EV) and mixing
The research and development and application of the powerful devices such as electric car (HEV) receive the attention of height, and people are to the lithium as power-supply system
Ion battery requires high capacity and high-power characteristic.
In general, electrode material and electrolyte occur instead in solid liquid interface during lithium ion battery first charge-discharge
It answers, forms one layer of passivation layer for being covered in the surface of electrode material.This layer of passivation layer is a kind of boundary layer, has solid electrolyte
Feature.It is the good conductor that electric insulators are lithium ion, lithium ion can pass through the passivation layer and freely be embedded in and take off
The active matter tree of electrode out, therefore this layer of passivating film becomes " solid electrolyte interface film ", abbreviation SEI film.The formation meeting of SEI film
Irreversible a part of lithium ion of consumption, is reduced so as to cause the lithium salt component of the electrolyte in lithium ion battery, so as to cause
The capacity attenuation of lithium ion battery and the reduction of cycle efficieny.
So finding a kind of method can overcome the disadvantages that specific capacity, the head to form lithium ion consumed by SEI film for improving battery
Secondary charge and discharge coulombic efficiency and cyclical stability are particularly important.The main prelithiation method of pole piece is as follows at present:
Physics prelithiation: such as covering one layer of metal lithium sheet in substrate surface, (such as application No. is the special of JP1996027910
Benefit), but this method mends the amount of lithium in advance and is far longer than the amount of the actually required lithium asked, and the later period that extra lithium can damage battery is followed
Ring；For another example mixed inert lithium powder or lithium salts are into carrying out prelithiation (such as Publication No. CN1290209C patent, publication number among pole piece
For the patent etc. of CN201680012069.3), the inertia lithium powder of this method is not easy to store and is easy to cause safety problem.
Lithium metal: such as being deposited to the surface of electrode by the method for electrochemistry using the principle of electrolytic cell, carries out prelithiation (such as
Publication No. CN105845894A patent), this method is generated point effect, is led to lithium metal due to pole piece out-of-flatness
Deposition is uneven, will affect the performance of battery in this way.
All there is respective shortcomings for the above several method, this results in prelithiation effect less desirable, instead
The performance of battery can further be limited.
Utility model content
The utility model provides a kind of lithium ion cell electrode interval prelithiation device, to solve asking for the prior art
Topic, the utility model can be uniform using a prelithiation is formed under the method collective effect of physical contact method and electrochemistry
Pole piece, so as to produce high capacity, high circulation, high magnification and the excellent lithium ion battery of security performance.
In order to achieve the above objectives, the utility model adopts the following technical solution:
A kind of lithium ion cell electrode interval prelithiation device, including two pieces of backing plates being oppositely arranged, one of backing plate
Inside be fixed with metal lithium bands, be fixed with using the organic solvent humidifying containing lithium salts that treated on the inside of another piece of backing plate
Battery pole piece, and metal lithium bands and battery pole piece are in close contact, and one piece is respectively arranged on the outside of two pieces of backing plates for outside providing
The pole plate of added electric field.
Further, the battery pole piece is positive or negative pole.
Further, the width of the metal lithium bands is 5-20mm bigger than the width of battery pole piece.
Compared with prior art, the utility model has technical effect beneficial below:
A kind of prelithiation device of the interval of lithium ion cell positive and cathode provided by the utility model is to utilize metal
Potential difference between lithium band and battery pole piece, directly contact react, and form electricity by pulse voltage not in contact with part
It solves slot and carries out electrochemistry prelithiation.The correlations such as pressure and electric field strength when can be to time of contact, humidifying degree, contact
Parameter control and then controls prelithiation degree.The device can be directly connected in existing battery production technology, between realization
Disconnected property production；Prelithiation compares other more uniformly, and is not related to lithium powder, and safety is good.
Further, the width of metal lithium bands is 5-20mm bigger than the width of battery pole piece, and lithium band can be completely covered on electricity
On the pole piece of pond, ensure that pole piece can carry out pre- benefit lithium without being omitted completely in this way.
Detailed description of the invention
Fig. 1 is lithium ion cell electrode interval prelithiation schematic device；
Wherein, 1 is backing plate, and 2 be metal lithium bands, and 3 be battery pole piece, and 4 be pole plate；
Fig. 2 is the circulating battery comparison diagram of the utility model embodiment.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawing:
Referring to Fig. 1, a kind of interval prelithiation device of lithium ion cell positive and cathode, including battery pole piece 3 and metal
Lithium band 2.Under inert gas protection, first metal lithium bands 2 are fixed on backing plate 1, then by the organic solution humidifying of battery pole piece 3
Processing, then by metal lithium bands 2, battery pole piece 3 is contacted with treated, and uses the extra electric field in addition of pole plate 4, makes it
Carry out prelithiation process, then by prelithiation complete pole piece washed by DMC, wherein the organic solvent of humidifying for containing
There is the organic solution of lithium salts, lithium salts can be LiClO4、LiPF6、LiTFSI、LiFSI、LiBF4、LiAsF6, LiBOB and four benzene
Ylboronic acid lithium etc. is one such or several；Organic solvent is that carbonates, esters, ethers, nitrile and sulfone class etc. are a kind of or several
Kind；The battery pole piece can be anode and be also possible to cathode.Width of the width of the metal lithium bands 2 than battery pole piece 3
Big 5~20mm, 3 width of battery pole piece are configured according to required battery types；Metal lithium bands 2 and treated battery pole piece 3
Pressure is 0.5~20KPa when contact, and electric field strength is 400~1000V/m, and humidifying is handled and the mode of subsequent wash can
To be that spray and immersion etc. are one or several kinds of.
The utility model is described in further detail below with reference to specific implementation:
Embodiment 1
A kind of interval prelithiation device of lithium ion cell positive and cathode, using containing LiClO4Carbonates it is organic
Solvent carries out the battery pole piece 3 after spray humidifying and directly contacts with the metal lithium bands 2 being fixed on backing plate 1, the width of metal lithium bands 2
Pressure 10mm bigger than the width of battery pole piece 3, and passing through the application of pole plate 4 10KPa is spent, contacts 4 minutes, outer be powered on during which is added
400V/m is washed pole piece by DMC immersion after prelithiation, washing process and dries pole piece process special
Cabinet in carry out, the solvent of evaporation is subjected to condensing recovery.
Embodiment 2
A kind of interval prelithiation device of lithium ion cell positive and cathode, using the ether organic solvent containing LiTFSI
Battery pole piece 3 after carrying out immersion humidifying is directly contacted with the metal lithium bands 2 being fixed on backing plate 1, the width ratio of metal lithium bands 2
The big 5mm of the width of battery pole piece 3, and by the pressure of the application of pole plate 4 0.5KPa, it contacts 4 minutes, extra electric field is during which added
1000V/m is washed pole piece by DMC immersion after prelithiation, and washing process and dry pole piece process are special
Cabinet in carry out, the solvent of evaporation is subjected to condensing recovery.
Wherein organic solvent can also be containing LiClO4、LiPF6With the nitrile and sulfone class mixed organic solvents of LiTFSI,
It or is the carbonates containing tetraphenylboronic acid lithium, ethers and nitrile mixed organic solvents.
Embodiment 3
A kind of interval prelithiation device of lithium ion cell positive and cathode, using containing LiAsF6And LiPF6Nitrile have
Solvent carries out the battery pole piece 3 after immersion humidifying and directly contacts with the metal lithium bands 2 being fixed on backing plate 1, metal lithium bands 2
Width is 20mm bigger than the width of battery pole piece 3, and applies the pressure of 20KPa by pole plate 4, contacts 4 minutes, is during which added additional
Electric field 800V/m is washed pole piece by DMC spray after prelithiation, and washing process and dry pole piece process are in spy
It is carried out in different cabinet, the solvent of evaporation is subjected to condensing recovery.
Control group in Fig. 2 is to take pole piece identical with embodiment, and to pole piece without any processing, direct-assembling at
Battery is tested, and is all consistent with the assembling process of embodiment and the electrolysis amount of addition.Pass through this as seen from Figure 2
Device mends the stabilization that the first effect height of the battery of the pole piece formation after lithium causes circulating battery capacity starting point also high, and recycles in advance
Property also has very high promotion.
Claims (3)
1. a kind of lithium ion cell electrode interval prelithiation device, which is characterized in that including two pieces of backing plates (1) being oppositely arranged,
It is fixed with metal lithium bands (2) on the inside of one of backing plate (1), is fixed with to use on the inside of another piece of backing plate (1) and contains lithium salts
Organic solvent humidifying treated battery pole piece (3), and metal lithium bands (2) and battery pole piece (3) are in close contact, two pieces of backing plates
(1) one piece is respectively arranged on the outside of for providing the pole plate (4) of extra electric field.
2. a kind of lithium ion cell electrode interval prelithiation device according to claim 1, which is characterized in that the battery
Pole piece (3) is positive or negative pole.
3. a kind of lithium ion cell electrode interval prelithiation device according to claim 1, which is characterized in that the metal
The width of lithium band (2) is 5-20mm bigger than the width of battery pole piece (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822227435.6U CN209217115U (en) | 2018-12-27 | 2018-12-27 | A kind of lithium ion cell electrode interval prelithiation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822227435.6U CN209217115U (en) | 2018-12-27 | 2018-12-27 | A kind of lithium ion cell electrode interval prelithiation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209217115U true CN209217115U (en) | 2019-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822227435.6U Active CN209217115U (en) | 2018-12-27 | 2018-12-27 | A kind of lithium ion cell electrode interval prelithiation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209217115U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113823842A (en) * | 2020-06-19 | 2021-12-21 | 北京卫蓝新能源科技有限公司 | Device and method for pre-lithium of pole piece |
-
2018
- 2018-12-27 CN CN201822227435.6U patent/CN209217115U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113823842A (en) * | 2020-06-19 | 2021-12-21 | 北京卫蓝新能源科技有限公司 | Device and method for pre-lithium of pole piece |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240307 Address after: 710061 3rd Floor, No. 88 Aerospace East Road, National Civil Aerospace Industry Base, Xi'an City, Shaanxi Province Patentee after: Shaanxi Qingke Energy Technology Co.,Ltd. Country or region after: China Patentee after: Northwestern Polytechnical University Address before: 710077 Shaanxi Coal Industry Chemical Group Co., Ltd. No. 2 Jinye Road, Xi'an High-tech Zone, Shaanxi Province Patentee before: SHAANXI COAL AND CHEMICAL TECHNOLOGY INSTITUTE Co.,Ltd. Country or region before: China Patentee before: Northwestern Polytechnical University |
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| TR01 | Transfer of patent right |