CN110085450B - Electrolyte for lithium ion capacitor - Google Patents

Electrolyte for lithium ion capacitor Download PDF

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Publication number
CN110085450B
CN110085450B CN201910275820.4A CN201910275820A CN110085450B CN 110085450 B CN110085450 B CN 110085450B CN 201910275820 A CN201910275820 A CN 201910275820A CN 110085450 B CN110085450 B CN 110085450B
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electrolyte
lithium ion
ion capacitor
parts
lithium
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CN110085450A (en
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阮殿波
乔志军
丁升
陈宽
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Ningbo CRRC New Energy Technology Co Ltd
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Ningbo CSR New Energy Technology Co Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/04—Hybrid capacitors
    • H01G11/06—Hybrid capacitors with one of the electrodes allowing ions to be reversibly doped thereinto, e.g. lithium ion capacitors [LIC]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/54—Electrolytes
    • H01G11/58—Liquid electrolytes
    • H01G11/60—Liquid electrolytes characterised by the solvent
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/54—Electrolytes
    • H01G11/58—Liquid electrolytes
    • H01G11/62—Liquid electrolytes characterised by the solute, e.g. salts, anions or cations therein
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/84—Processes for the manufacture of hybrid or EDL capacitors, or components thereof
    • 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
    • Y02E60/13—Energy storage using capacitors

Abstract

The invention relates to preparation of an electrolyte for a lithium ion capacitor, in particular to preparation of an electrolyte with high specific energy, low internal resistance and long service life and application of the electrolyte in the lithium ion capacitor, wherein the electrolyte takes lithium salt and organic salt as solutes and takes a mixed solution of ethylene carbonate, methyl ethyl carbonate, ethyl acetate and acetonitrile as a solvent, and the molar concentrations of the lithium salt and the organic salt in the electrolyte are both 1.6-2.0 mol/L. The high-concentration lithium salt in the electrolyte is mainly used for shortening the diffusion distance of lithium ions and relieving the loss of the lithium salt in the circulation process; the organic salt is mainly used for energy storage of the anode electrode, and is finally beneficial to realizing the service characteristics of high capacity, low internal resistance and long service life of the lithium ion capacitor.

Description

Electrolyte for lithium ion capacitor
Technical Field
The invention relates to preparation of an electrolyte for a lithium ion capacitor, in particular to preparation of an electrolyte with high specific energy, low internal resistance and long service life and application of the electrolyte in the lithium ion capacitor.
Background
The performance of the lithium ion capacitor is continuously improved, such as energy density, power density, cycle performance, high-rate discharge performance and the like. With the continuous research and application of new materials and new technologies in the field of lithium ion capacitors, the safety of the lithium ion capacitor is also greatly improved. The continuous improvement of the performance of the lithium ion capacitor promotes the lithium ion capacitor to be widely applied in more and more fields. However, as the application range of the lithium ion capacitor is wider, the problem that the lithium ion capacitor has poor adaptability to the application environment is increasingly highlighted. For example, the lithium ion capacitor has poor charge and discharge performance in a low-temperature environment, and particularly in a cold region and an environment with temperature of more than minus twenty degrees in winter, the lithium ion capacitor can not be used normally, so that the use of the lithium ion capacitor in a place with low temperature is greatly influenced, and the application range of the lithium ion capacitor is limited by regions. In order to solve the problem of poor low-temperature charge and discharge performance of the lithium ion capacitor, in practical application, the adopted method comprises the steps of heating the lithium ion capacitor, creating a constant-temperature small environment, avoiding low-temperature outdoor service time and the like. In the methods, the use cost of the lithium ion capacitor is increased by heating the lithium ion capacitor or creating a constant temperature environment, and the normal use of the lithium ion capacitor is prevented from being influenced by low-temperature use.
In order to improve the low-temperature performance of the lithium ion capacitor and avoid increasing the cost and causing limitation on the use of the lithium ion capacitor, research and development of a lithium ion capacitor material capable of improving the low-temperature performance of the lithium ion capacitor becomes a relatively ideal solution.
Disclosure of Invention
The invention provides an electrolyte for a lithium ion capacitor, and provides a low-temperature electrolyte for a lithium ion capacitor with good low-temperature discharge performance, aiming at the problems in the prior art.
The purpose of the invention is realized by the following technical scheme: the electrolyte for the lithium ion capacitor takes lithium salt and organic salt as solutes and takes a mixed solution of ethylene carbonate, methyl ethyl carbonate, ethyl acetate and acetonitrile as a solvent, wherein the molar concentrations of the lithium salt and the organic salt in the electrolyte are both 1.6-2.0 mol/L.
The high-concentration lithium salt in the electrolyte for the lithium ion capacitor is mainly used for shortening the diffusion distance of lithium ions and relieving the loss of the lithium salt in the circulation process; the organic salt is mainly used for energy storage of the anode electrode, and is finally beneficial to realizing the service characteristics of high capacity, low internal resistance and long service life of the lithium ion capacitor.
In the electrolyte for the lithium ion capacitor, the mass fractions of the ethylene carbonate, the ethyl methyl carbonate, the ethyl acetate and the acetonitrile in the solvent are respectively 35-45wt%, 10-15wt% and 10-15 wt%.
In the above electrolyte for lithium ion capacitor, the lithium salt is LiPF6、LiBF4、 LiClO4One or more of (a).
In the electrolyte for the lithium ion capacitor, the organic salt is SBPBF4、 TEABF4、TEMABF4One or more of (a).
A preparation method of an electrolyte for a lithium ion capacitor comprises the following steps: adding lithium salt into a solvent, uniformly stirring, adding organic salt, and uniformly mixing to obtain the electrolyte.
In the preparation method of the electrolyte for the lithium ion capacitor, the stirring speed is 50-200rpm, the stirring control temperature is 40-60 ℃, and the stirring time is 4-8 h.
In the preparation method of the electrolyte for the lithium ion capacitor, the mixing temperature is 40-60 ℃, the speed during mixing is 50-200rpm, and the mixing time is 2-6 h.
In the preparation method of the electrolyte for the lithium ion capacitor, the preparation process is carried out in a glove box environment with the moisture content of less than 1ppm and the oxygen content of less than 0.1 ppm.
A preparation method of a lithium ion capacitor comprises the following steps: pre-assembling a negative pole piece, a cellulose diaphragm, a positive pole piece and the cellulose diaphragm according to a Z-shaped lamination mode, and laminating a metal lithium piece on the outer side of the diaphragm close to the outermost negative pole piece to assemble a battery cell; and placing the battery cell in an aluminum-plastic film shell, injecting the electrolyte, vacuumizing and sealing to obtain the lithium ion capacitor.
In the preparation method of the lithium ion capacitor, the negative electrode in the negative electrode plate comprises the following components in parts by weight: 80-92 parts of carbon negative electrode material, 2-10 parts of conductive carbon black, 3-5 parts of styrene butadiene rubber and 3-5 parts of sodium hydroxymethyl cellulose.
Preferably, the carbon negative electrode material is one or more of artificial graphite, natural graphite, soft carbon and hard carbon.
Preferably, the preparation method of the negative pole piece comprises the following steps: stirring and mixing the carbon negative electrode material, the conductive carbon black, the styrene-butadiene rubber and the sodium carboxymethylcellulose under a vacuum condition to obtain slurry, uniformly coating the slurry on a corrosion aluminum foil, and drying, rolling, slitting and punching to obtain the negative electrode plate.
Preferably, the slurry has a solids content of 20 to 30 wt%.
Preferably, the size of the negative pole piece is (50-60) mm (70-80) mm.
In the preparation method of the lithium ion capacitor, the positive electrode in the positive electrode plate comprises the following components in parts by weight: 80-92 parts of activated carbon material, 4-10 parts of conductive carbon black, 2-5 parts of sodium carboxymethyl cellulose dispersing agent and 3-5 parts of binder.
Preferably, the binder is one of SBR, JSR and LA 132.
Preferably, the preparation method of the positive pole piece comprises the following steps: the preparation method comprises the steps of obtaining positive electrode slurry with the viscosity of 900-1500cps from an activated carbon material, conductive carbon black, a sodium carboxymethyl cellulose dispersing agent and a binder under the vacuum stirring condition, coating the positive electrode slurry on a corrosion aluminum foil to form an electrode, and then drying, rolling and punching to obtain the positive electrode piece.
Preferably, the size of the positive pole piece is (50-60) mm x (70-80) mm.
Compared with the prior art, the invention has the following advantages:
1) the production cost is low, the operation process is simple, and mass production is easy to realize. The raw materials selected in the composite electrolyte are all industrial large-scale products, and the preparation process only needs to control the moisture content, the oxygen content, the mixing temperature, the mixing time and the mixing rotating speed of the operating environment.
2) The obtained lithium ion capacitor has higher capacity, lower internal resistance and longer cycle life. The high-concentration lithium salt in the composite electrolyte is mainly used for shortening the diffusion distance of lithium ions and relieving the loss of the lithium salt in the circulation process; and the organic salt is mainly used for energy storage of the anode electrode. Finally, the use characteristics of high capacity, low internal resistance and long service life of the lithium ion capacitor are realized.
Detailed Description
The following are specific examples of the present invention and further describe the technical solutions of the present invention, but the present invention is not limited to these examples.
Example 1
Adding a lithium salt into a solvent, uniformly stirring, adding an organic salt, and uniformly mixing to obtain an electrolyte, wherein the stirring speed is 50rpm, the stirring control temperature is 40 ℃, and the stirring time is 4 hours; the mixing temperature is 4The mixing speed is 50rpm at 0 ℃, the mixing time is 2 hours, the preparation process is carried out in a glove box environment with the moisture content of 0.09ppm and the oxygen content of 0.09ppm, the electrolyte takes lithium salt and organic salt as solutes, the components in the solvent are 35 wt% of ethylene carbonate, 35 wt% of methyl ethyl carbonate, 15wt% of ethyl acetate and 15wt% of acetonitrile, the molar concentrations of the lithium salt and the organic salt in the electrolyte are both 1.6mol/L, and the lithium salt is LiPF6The organic salt is SBPBF4。
Example 2
Adding a lithium salt into a solvent, uniformly stirring, adding an organic salt, and uniformly mixing to obtain an electrolyte, wherein the stirring speed is 70rpm, the stirring control temperature is 45 ℃, and the stirring time is 5 hours; the mixing temperature is 45 ℃, the mixing speed is 70rpm, the mixing time is 3h, the preparation process is carried out in a glove box environment with the moisture content of 0.08ppm and the oxygen content of 0.08ppm, the electrolyte takes lithium salt and organic salt as solutes, the components in the solvent are 37 wt% of ethylene carbonate, 37 wt% of methyl ethyl carbonate, 11 wt% of ethyl acetate and 11 wt% of acetonitrile, wherein the molar concentrations of the lithium salt and the organic salt in the electrolyte are both 1.7mol/L, and the lithium salt is LiPF6、LiBF4The organic salt is SBPBF4、TEABF4。
Example 3
Adding a lithium salt into a solvent, uniformly stirring, adding an organic salt, and uniformly mixing to obtain an electrolyte, wherein the stirring speed is 125rpm, the stirring control temperature is 50 ℃, and the stirring time is 6 hours; the mixing temperature is 50 ℃, the speed during mixing is 125rpm, the mixing time is 4h, the preparation process is carried out in a glove box environment with the moisture content of 0.05ppm and the oxygen content of less than 0.05ppm, the electrolyte takes lithium salt and organic salt as solutes, the components in the solvent are 40 wt% of ethylene carbonate, 40 wt% of methyl ethyl carbonate, 10 wt% of ethyl acetate and 10 wt% of acetonitrile, wherein the molar concentrations of the lithium salt and the organic salt in the electrolyte are both 1.8mol/L, and the lithium salt is LiPF6、LiBF4、LiClO4The organic salt is SBPBF4、TEABF4、TEMABF4。
Example 4
Adding a lithium salt into a solvent, uniformly stirring, adding an organic salt, and uniformly mixing to obtain an electrolyte, wherein the stirring speed is 150rpm, the stirring control temperature is 55 ℃, and the stirring time is 7 hours; the mixing temperature is 55 ℃, the speed during mixing is 180rpm, the mixing time is 5h, the preparation process is carried out in a glove box environment with the moisture content of 0.08ppm and the oxygen content of 0.08ppm, the electrolyte takes lithium salt and organic salt as solutes, the components in the solvent are 42 wt% of ethylene carbonate, 42 wt% of methyl ethyl carbonate, 13 wt% of ethyl acetate and 13 wt% of acetonitrile, wherein the molar concentrations of the lithium salt and the organic salt in the electrolyte are both 1.9mol/L, and the lithium salt is LiClO4The organic salt is TEMABF4。
Example 5
Adding a lithium salt into a solvent, uniformly stirring, adding an organic salt, and uniformly mixing to obtain an electrolyte, wherein the stirring speed is 200rpm, the stirring control temperature is 60 ℃, and the stirring time is 8 hours; the mixing temperature is 60 ℃, the speed during mixing is 200rpm, the mixing time is 6h, the preparation process is carried out in a glove box environment with the moisture content of 0.06ppm and the oxygen content of 0.06ppm, the electrolyte takes lithium salt and organic salt as solutes, the components in the solvent are 40 wt% of ethylene carbonate, 40 wt% of methyl ethyl carbonate, 10 wt% of ethyl acetate and 10 wt% of acetonitrile, wherein the molar concentrations of the lithium salt and the organic salt in the electrolyte are both 2.0mol/L, and the lithium salt is LiBF4、LiClO4The organic salt is TEABF4、TEMABF4。
Example 6
The only difference from example 3 is that the preparation process of this example was carried out in a glove box environment having a moisture content of 0.11ppm and an oxygen content of 0.11 ppm.
Comparative example 1
The difference from example 3 is only that this example uses a common commercially available electrolyte for a lithium ion capacitor, and the rest is the same as example 3, and the description thereof is omitted.
Comparative example 2
The only difference from example 3 is that the solvent in this example does not contain ethylene carbonate, and the rest is the same as example 3, and the description is omitted here.
Comparative example 3
The only difference from example 3 is that the solvent in this example does not contain ethyl methyl carbonate, and the rest is the same as example 3, and the description is omitted here.
Comparative example 4
The only difference from example 3 is that the solvent in this example does not contain ethyl acetate, and the rest is the same as example 3, and the description is omitted here.
Comparative example 5
The only difference from example 3 is that the solvent in this example does not contain acetonitrile, and the rest is the same as example 3, and the description is omitted here.
Application example 1
Pre-assembling a negative pole piece, a cellulose diaphragm, a positive pole piece and the cellulose diaphragm according to a Z-shaped lamination mode, and overlapping a metal lithium piece outside the diaphragm close to the outermost negative pole piece to assemble a battery cell; placing a battery cell in an aluminum-plastic film shell, injecting the electrolyte prepared in the embodiment 1, and vacuumizing and sealing to obtain the lithium ion capacitor, wherein the negative electrode in the negative electrode plate comprises the following components in parts by weight: 86 parts of carbon negative electrode material, 6 parts of conductive carbon black, 4 parts of styrene butadiene rubber and 4 parts of sodium hydroxymethyl cellulose, wherein the carbon negative electrode material is one or more of artificial graphite, natural graphite, soft carbon, hard carbon and the like, and the preparation method of the negative electrode plate comprises the following steps: stirring and mixing a carbon negative electrode material, conductive carbon black, styrene butadiene rubber and sodium carboxymethylcellulose under a vacuum condition to obtain slurry, uniformly coating the slurry on a corrosion aluminum foil, and drying, rolling, slitting and punching to obtain a negative electrode plate, wherein the solid content of the slurry is 25 wt%, and the size of the negative electrode plate is 55mm x 75 mm; the positive electrode in the positive electrode piece comprises the following components in parts by weight: 86 parts of an activated carbon material, 7 parts of conductive carbon black, 3 parts of a sodium carboxymethyl cellulose dispersing agent and 4 parts of a binder, wherein the binder is SBR. The preparation method of the positive pole piece comprises the following steps: the preparation method comprises the steps of stirring an activated carbon material, conductive carbon black, a sodium carboxymethyl cellulose dispersing agent and a binder in vacuum to obtain positive electrode slurry with the viscosity of 1200cps, coating the positive electrode slurry on a corrosion aluminum foil to form an electrode, and then drying, rolling and punching to obtain a positive electrode piece, wherein the size of the positive electrode piece is 55mm x 75 mm.
Application example 2
The difference from application example 1 is only that the electrolyte in the application example is the electrolyte prepared in example 2, and the rest is the same as application example 1, and is not described again here.
Application example 3
The difference from application example 1 is only that the electrolyte in the application example is the electrolyte prepared in example 3, and the rest is the same as application example 1, and is not described again here.
Application example 4
The difference from application example 1 is only that the electrolyte in the application example is the electrolyte prepared in example 4, and the rest is the same as application example 1, and is not described again here.
Application example 5
The difference from application example 1 is only that the electrolyte in the application example is the electrolyte prepared in example 5, and the rest is the same as application example 1, and is not described again here.
Application example 6
The difference from application example 1 is only that the electrolyte in the application example is the electrolyte prepared in example 6, and the rest is the same as application example 1, and is not described again here.
Application example 7
The difference from application example 1 is only that the electrolyte in the application example is the electrolyte prepared in comparative example 1, and the rest is the same as application example 1, and the description is omitted here.
Application example 8
The difference from application example 1 is only that the electrolyte in the application example is the electrolyte prepared in comparative example 2, and the rest is the same as application example 1, and the description is omitted.
Application example 9
The difference from application example 1 is only that the electrolyte in the application example is the electrolyte prepared in comparative example 3, and the rest is the same as application example 1, and the description is omitted.
Application example 10
The difference from application example 1 is only that the electrolyte in the application example is the electrolyte prepared in comparative example 4, and the rest is the same as application example 1, and the description is omitted.
Application example 11
The difference from application example 1 is only that the electrolyte in the application example is the electrolyte prepared in comparative example 5, and the rest is the same as application example 1, and the description is omitted.
The lithium ion capacitor prepared in application examples 1 to 11 was subjected to pre-intercalation treatment for 3 times of constant current charge and discharge between 0.01C and 0 to 2.2V for the negative electrode and the lithium metal electrode, and then subjected to capacity, internal resistance and cycle life tests, with the test results shown in table 1:
table 1: performance test results of lithium ion capacitors prepared in application examples 1 to 11
Figure GDA0002789440100000101
From the above results, it can be seen that the lithium ion capacitor of the present invention has higher capacity, lower internal resistance and longer cycle life. The high-concentration lithium salt in the composite electrolyte is mainly used for shortening the diffusion distance of lithium ions and relieving the loss of the lithium salt in the circulation process; and the organic salt is mainly used for energy storage of the anode electrode. Finally, the use characteristics of high capacity, low internal resistance and long service life of the lithium ion capacitor are realized.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
While the invention has been described in detail and with reference to specific embodiments thereof, it will be apparent to one skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope thereof.

Claims (8)

1. The electrolyte for the lithium ion capacitor is characterized in that lithium salt and organic salt are used as solutes, a mixed solution of ethylene carbonate, ethyl methyl carbonate, ethyl acetate and acetonitrile is used as a solvent, and the molar concentrations of the lithium salt and the organic salt in the electrolyte are both 1.6-2.0 mol/L; the mass fractions of the ethylene carbonate, the ethyl methyl carbonate, the ethyl acetate and the acetonitrile in the solvent are respectively 35-45wt%, 10-15wt% and 10-15 wt%.
2. The method for preparing the electrolyte for the lithium ion capacitor according to claim 1, comprising the steps of: adding a lithium salt into a solvent, uniformly stirring, adding an organic salt, and uniformly mixing to obtain an electrolyte, wherein the stirring speed is 50-200rpm, the stirring control temperature is 40-60 ℃, and the stirring time is 4-8 hours; the mixing temperature is 40-60 ℃, the speed during mixing is 50-200rpm, and the mixing time is 2-6 h.
3. The method for preparing the electrolyte for lithium ion capacitors according to claim 2, wherein the preparation is carried out in a glove box environment having a moisture content of less than 1ppm and an oxygen content of less than 0.1 ppm.
4. A preparation method of a lithium ion capacitor is characterized in that a negative pole piece, a cellulose diaphragm, a positive pole piece and the cellulose diaphragm are preassembled according to a Z-shaped lamination mode, and a metal lithium piece is laminated on the outer side of the diaphragm close to the negative pole piece on the outermost layer to assemble a battery core; and (3) placing the battery cell in an aluminum-plastic film shell, injecting the electrolyte according to claim 1, and vacuumizing and sealing to obtain the lithium ion capacitor.
5. The preparation method of the lithium ion capacitor according to claim 4, wherein the negative electrode in the negative electrode plate comprises the following components in parts by weight: 80-92 parts of carbon negative electrode material, 2-10 parts of conductive carbon black, 3-5 parts of styrene butadiene rubber and 3-5 parts of sodium hydroxymethyl cellulose.
6. The method for preparing the lithium ion capacitor according to claim 5, wherein the carbon negative electrode material is one or more of artificial graphite, natural graphite, soft carbon and hard carbon.
7. The preparation method of the lithium ion capacitor according to claim 4, wherein the positive electrode in the positive electrode plate comprises the following components in parts by weight: 80-92 parts of activated carbon material, 4-10 parts of conductive carbon black, 2-5 parts of sodium carboxymethyl cellulose dispersing agent and 3-5 parts of binder.
8. The method for preparing the lithium ion capacitor according to claim 7, wherein the method for preparing the positive electrode plate comprises the following steps: the preparation method comprises the steps of obtaining positive electrode slurry with the viscosity of 900-1500cps from an activated carbon material, conductive carbon black, a sodium carboxymethyl cellulose dispersing agent and a binder under the vacuum stirring condition, coating the positive electrode slurry on a corrosion aluminum foil to form an electrode, and then drying, rolling and punching to obtain the positive electrode piece.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023117488A1 (en) * 2021-12-23 2023-06-29 Skeleton Technologies GmbH Electrolyte compositions for energy storage cells with fast charge and discharge capabilites

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Publication number Priority date Publication date Assignee Title
CN101079510A (en) * 2007-06-25 2007-11-28 中南大学 A super capacitance cell
CN104364937A (en) * 2012-05-28 2015-02-18 可乐丽股份有限公司 Separator for non-aqueous cell and non-aqueous cell
CN106848397A (en) * 2016-12-22 2017-06-13 宁波中车新能源科技有限公司 A kind of lithium-ion capacitor electrolyte

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101079510A (en) * 2007-06-25 2007-11-28 中南大学 A super capacitance cell
CN104364937A (en) * 2012-05-28 2015-02-18 可乐丽股份有限公司 Separator for non-aqueous cell and non-aqueous cell
CN106848397A (en) * 2016-12-22 2017-06-13 宁波中车新能源科技有限公司 A kind of lithium-ion capacitor electrolyte

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023117488A1 (en) * 2021-12-23 2023-06-29 Skeleton Technologies GmbH Electrolyte compositions for energy storage cells with fast charge and discharge capabilites

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