CN104485233A - Super lithium capacitor - Google Patents
Super lithium capacitor Download PDFInfo
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- CN104485233A CN104485233A CN201410729272.5A CN201410729272A CN104485233A CN 104485233 A CN104485233 A CN 104485233A CN 201410729272 A CN201410729272 A CN 201410729272A CN 104485233 A CN104485233 A CN 104485233A
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- lithium
- carbon
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- polytetrafluoroethylene
- capacitor
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- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 104
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 81
- 239000003990 capacitor Substances 0.000 title claims abstract description 59
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 112
- 239000011888 foil Substances 0.000 claims abstract description 89
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 64
- 239000000203 mixture Substances 0.000 claims abstract description 51
- -1 lithium hexafluorophosphate Chemical compound 0.000 claims abstract description 49
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 34
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 34
- 239000007769 metal material Substances 0.000 claims abstract description 23
- 150000001875 compounds Chemical class 0.000 claims abstract description 17
- 239000010405 anode material Substances 0.000 claims abstract description 11
- 239000003792 electrolyte Substances 0.000 claims abstract description 10
- 239000003960 organic solvent Substances 0.000 claims abstract description 8
- 229910001496 lithium tetrafluoroborate Inorganic materials 0.000 claims abstract description 4
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 38
- 239000002041 carbon nanotube Substances 0.000 claims description 38
- 239000006229 carbon black Substances 0.000 claims description 32
- 239000000463 material Substances 0.000 claims description 27
- 239000011159 matrix material Substances 0.000 claims description 16
- 239000005030 aluminium foil Substances 0.000 claims description 14
- 239000002253 acid Substances 0.000 claims description 13
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 11
- 229910002097 Lithium manganese(III,IV) oxide Inorganic materials 0.000 claims description 10
- 229910017052 cobalt Inorganic materials 0.000 claims description 10
- 239000010941 cobalt Substances 0.000 claims description 10
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 10
- 239000010439 graphite Substances 0.000 claims description 10
- 229910002804 graphite Inorganic materials 0.000 claims description 10
- 229910052493 LiFePO4 Inorganic materials 0.000 claims description 9
- OVAQODDUFGFVPR-UHFFFAOYSA-N lithium cobalt(2+) dioxido(dioxo)manganese Chemical compound [Li+].[Mn](=O)(=O)([O-])[O-].[Co+2] OVAQODDUFGFVPR-UHFFFAOYSA-N 0.000 claims description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 239000011889 copper foil Substances 0.000 claims description 7
- 239000012528 membrane Substances 0.000 claims description 7
- 239000004698 Polyethylene Substances 0.000 claims description 5
- 229920000573 polyethylene Polymers 0.000 claims description 5
- QGHDLJAZIIFENW-UHFFFAOYSA-N 4-[1,1,1,3,3,3-hexafluoro-2-(4-hydroxy-3-prop-2-enylphenyl)propan-2-yl]-2-prop-2-enylphenol Chemical group C1=C(CC=C)C(O)=CC=C1C(C(F)(F)F)(C(F)(F)F)C1=CC=C(O)C(CC=C)=C1 QGHDLJAZIIFENW-UHFFFAOYSA-N 0.000 claims description 4
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 claims description 4
- 229910019142 PO4 Inorganic materials 0.000 claims description 4
- 239000004743 Polypropylene Substances 0.000 claims description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 4
- 239000010452 phosphate Substances 0.000 claims description 4
- 229920001155 polypropylene Polymers 0.000 claims description 4
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 claims description 3
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 claims description 3
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 claims description 3
- RIUWBIIVUYSTCN-UHFFFAOYSA-N trilithium borate Chemical compound [Li+].[Li+].[Li+].[O-]B([O-])[O-] RIUWBIIVUYSTCN-UHFFFAOYSA-N 0.000 claims description 3
- 239000003575 carbonaceous material Substances 0.000 abstract 2
- NHBALETWERXBJO-UHFFFAOYSA-N B([O-])([O-])[O-].B([O-])([O-])[O-].[Li+].[Li+].[Li+].[Li+].[Li+].[Li+] Chemical compound B([O-])([O-])[O-].B([O-])([O-])[O-].[Li+].[Li+].[Li+].[Li+].[Li+].[Li+] NHBALETWERXBJO-UHFFFAOYSA-N 0.000 abstract 1
- 238000007599 discharging Methods 0.000 description 11
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 9
- 229910001416 lithium ion Inorganic materials 0.000 description 9
- 239000000178 monomer Substances 0.000 description 9
- 239000010408 film Substances 0.000 description 7
- 238000004146 energy storage Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000002390 adhesive tape Substances 0.000 description 3
- 238000001467 acupuncture Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000009658 destructive testing Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000011149 active material Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-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
- H01G11/22—Electrodes
- H01G11/30—Electrodes characterised by their material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Materials Engineering (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Secondary Cells (AREA)
Abstract
The invention provides a super lithium capacitor. The super lithium capacitor comprises a shell, an electric core as well as a positive guide pin and a negative guide pin, wherein the upper part of the shell is provided with a rubber plug, and the shell is used for accommodating electrolyte; the electric core is formed by overlapping and coiling a cathode foil, an anode foil and a piece of diaphragm paper; the cathode foil and the anode foil are separated by the diaphragm paper, and the diaphragm paper is provided with micropores; the positive guide pin and the negative guide pin extend out of the rubber plug and are connected with the electric core; the electrolyte comprises a solute and an organic solvent, wherein the solute comprises at least one compound selected from lithium hexafluorophosphate, lithium tetrafluoroborate, lithium bis borate and lithium hexafluoroarsenate or a mixture composed of the compounds; the mass percent of the solute is 40-50 percent; the cathode foil comprises the following components in percentage by mass: 90-94 percent of lithium metal material, 4-8 percent of carbon material and 1-5 percent of polytetrafluoroethylene; the anode foil comprises the following components in percentage by mass: 90-93 percent of lithium metal material or carbon anode material, 4-7 percent of carbon material and 3-5 percent of polytetrafluoroethylene.
Description
Technical field
The present invention relates to a kind of ultracapacitor, specifically, relate to a kind of super lithium capacitor for energy storage.
Background technology
At present, the negative effects such as the pollution that traditional energy brings, cost are more and more serious, and the development of green novel energy source has been subject to the attention of whole world national governments.Two kinds of main energy-storage travelling wave tube-super capacitors and lithium ion battery, respective advantage is widely used, and respective shortcoming also governs development each other simultaneously.
Super capacitor is as the novel energy-storing element in recent years developed rapidly, there is the advantages such as fast charging and discharging, high power, long-life, a lot of country is applied to the dynamic field such as electric automobile, but its defect is that energy density is far below lithium ion battery, be used alone course continuation mileage wretched insufficiency, combinationally use and cause management cost to increase.
The appearance of lithium ion battery has greatly promoted the market development progress of rechargeable battery.The fields such as portable electrical appliance, stand-by power supply, digital product use lithium ion battery in a large number.Its advantage is high-energy-density, but critical defect is its poor stability, and higher cost also restricts its development simultaneously.
Therefore, need a kind of combining super capacitor and lithium ion battery advantage, evade again the new green power of both shortcomings simultaneously.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of super lithium capacitor, fast charging and discharging can either be realized, have extended cycle life, fail safe is remarkable, there are again high-energy-density, high voltage, meet all application demands such as energy storage, power and number, and multiple different monomer voltage can be provided, have wide range of applications.
For achieving the above object, the invention provides a kind of super lithium capacitor, it comprises: top is provided with the shell for holding electrolyte of rubber stopper, by Cathode Foil, anode foils and separated to described Cathode Foil and the described anode foils diaphragm paper with micropore is overlapped and the battery core reeled and stretch out in described rubber stopper and the positive guide pin be connected with described battery core and negative guide pin, described electrolyte comprises solute and organic solvent, described solute comprises at least one and is selected from lithium hexafluoro phosphate, LiBF4, dioxalic acid lithium borate, the compound of hexafluoroarsenate lithium or the mixture be made up of above-claimed cpd, the mass percent of described solute is 40% ~ 50%, described Cathode Foil content composition and mass percent thereof are: lithium metal material: 90%-94%, material with carbon element: 4%-8%, polytetrafluoroethylene: 1%-5%, described anode foils content composition and mass percent thereof are: lithium metal material or carbon anode material: 90%-93%, material with carbon element: 4%-7%, polytetrafluoroethylene: 3%-5%.
Preferably, the material of making of described Cathode Foil comprises lithium metal material and material with carbon element, and described lithium metal material comprises at least one and is selected from cobalt acid lithium, LiMn2O4, LiFePO4, the compound of nickle cobalt lithium manganate or the mixture that is made up of above-claimed cpd; Described material with carbon element comprises at least one and is selected from active carbon, carbon black, the compound of CNT (carbon nano-tube) or the mixture that is made up of above-claimed cpd; The material of making of described anode foils comprises lithium metal material or carbon anode material and material with carbon element, and described lithium metal material is lithium titanate; Described carbon anode material is native graphite; Described material with carbon element comprises at least one and is selected from active carbon, CNT (carbon nano-tube), the compound of carbon black or the mixture that is made up of above-claimed cpd.
Preferably, described Cathode Foil content composition and mass percent thereof are: LiFePO4: 90%-91%; Active carbon: 3%-4%; Carbon black: 1%-2%; Carbon nano-tube: 1%-2%; Polytetrafluoroethylene: 4%-5%; Described anode foils content composition and mass percent thereof are: lithium titanate: 91%-93%; Active carbon: 2%-3%; Carbon black: 1%-2%; Carbon nano-tube: 1%-2%; Polytetrafluoroethylene: 4%-5%.
Preferably, described Cathode Foil content composition and mass percent thereof are: cobalt acid lithium and and LiMn2O4 and nickle cobalt lithium manganate: 92%-94%; Active carbon: 2%-3%; Carbon black: 1%-2%; Carbon nano-tube: 1%-2%; Polytetrafluoroethylene: 1%-3%; Described anode foils content composition and mass percent thereof are: lithium titanate: 91%-93%; Active carbon: 2%-3%; Carbon black: 1%-2%; Carbon nano-tube: 1%-2%; Polytetrafluoroethylene: 4%-5%.
Preferably, described Cathode Foil content composition and mass percent thereof are: LiFePO4: 90%-91%; Active carbon: 3%-4%; Carbon black: 1%-2%; Carbon nano-tube: 1%-2%; Polytetrafluoroethylene: 4%-5%; Described anode foils content composition and mass percent thereof are: native graphite: 90%-92%; Active carbon: 2%-3%; Carbon black: 1%-2%; Carbon nano-tube: 1%-2%; Polytetrafluoroethylene: 4%-5%.
Preferably, cobalt acid lithium and LiMn2O4 and nickle cobalt lithium manganate: 92%-94%; Active carbon: 2%-3%; Carbon black: 1%-2%; Carbon nano-tube: 1%-2%; Polytetrafluoroethylene: 1%-3%; Described anode foils content composition and mass percent thereof are: native graphite: 90%-92%; Active carbon: 2%-3%; Carbon black: 1%-2%; Carbon nano-tube: 1%-2%; Polytetrafluoroethylene: 3%-5%.
Preferably, the matrix of described Cathode Foil is aluminium foil; The matrix of described anode foils is aluminium foil or Copper Foil.
Preferably, described diaphragm paper is polyethylene film or polypropylene film.
Preferably, described battery core is arranged in order according to the order of anode foils, membrane layer, Cathode Foil, membrane layer.
In addition, preferably, described organic solvent comprises at least one and is selected from ethylene carbonate, methyl ethyl carbonate, dimethyl carbonate, diethyl carbonate, the compound of Merlon or the mixture that is made up of above-claimed cpd.
Above-mentioned description and put into practice known, super lithium capacitor provided by the invention, one, the volume energy density of super lithium capacitor is higher than the volume energy density of lithium ion battery, be about its 1.2 times, and far above the volume energy density of super capacitor, be about its 20 ~ 25 times; Its two, super lithium capacitor can realize fast charging and discharging, is better than lithium ion battery, is equal to ultracapacitor; And, the increasing of discharging current, less on the impact of discharging efficiency; Its three, super lithium capacitor is more safe and reliable, and under the destructive testing conditions such as super-charge super-discharge, acupuncture extruding, short circuit, super lithium electric capacity is missing of ignition not to explode; And the super lithium capacitor cycle life-span can reach more than ten thousand times, meet all application demands such as energy storage, power and number completely; Its four, different monomer voltages can be provided, then by mutually connecting between monomer, the reality realizing various operating voltage effectively uses.
Accompanying drawing explanation
By below in conjunction with the description of accompanying drawing to embodiment, above-mentioned characteristic sum technological merit of the present invention will become apparent and easy understand.In the accompanying drawings,
Fig. 1 is the schematic diagram of the super lithium capacitor described in one embodiment of the invention;
Fig. 2 is the schematic diagram of the battery core of super lithium capacitor described in Fig. 1.
Reference numeral:
Super lithium capacitor 100;
1: shell; 2: rubber stopper; 3: anode foils; 4: diaphragm paper; 5: Cathode Foil; 6: terminal adhesive tape;
7: positive guide pin; 8: negative guide pin;
Embodiment
For enabling above-mentioned purpose of the present invention, feature and advantage become apparent more, and below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is the schematic diagram of the super lithium capacitor described in one embodiment of the invention.Fig. 2 is the schematic diagram of the battery core of super lithium capacitor described in Fig. 1.As depicted in figs. 1 and 2, super lithium capacitor 100 comprises shell 1, rubber stopper 2, anode foils 3, diaphragm paper 4, Cathode Foil 5, terminal adhesive tape 6, positive guide pin 7 and negative guide pin 8.
Shell 1 is aluminum hull, and shell 1 is for holding electrolyte, and shell 1 is cylindrical shape, and the diameter range of shell 1 is 4mm ~ 100mm, and altitude range is 5mm ~ 200mm, and the top of shell 1 is provided with the rubber stopper 2 for sealing.
Battery core comprises anode foils 3, Cathode Foil 5 and diaphragm paper 4 and overlaps and reel and form, and Cathode Foil 5 and anode foils 3 are separated by diaphragm paper 4.Preferably, battery core is arranged in order according to the order of anode foils 3, membrane layer 4, Cathode Foil 5, membrane layer 4.After winding, fixed by terminal adhesive tape 6.
Preferably, the matrix of Cathode Foil 5 is aluminium foil; The matrix of anode foils 3 is aluminium foil or Copper Foil.Diaphragm paper 4 is polyolefin porous membranes of high-strength thin-film, and diaphragm paper 4 is non-conductive and have micropore, effectively Cathode Foil 5, anode foils 3 can be separated, prevent from being short-circuited between the two poles of the earth, can also ensure passing through of electrolyte ion simultaneously.Preferably, diaphragm paper 4 is polyethylene film or polypropylene film.
The positive guide pin of nail joint 7 and negative guide pin 8 in battery core, battery core needs vacuum bakeout to remove moisture, then in the glove box that dew point is less than-60 DEG C, realizes vacuum impregnation, sealing operation.And then by changing into the active material in activated cathode paper tinsel 5, anode foils 3, make it have superior electrical property.Positive guide pin 7 and negative guide pin 8 other end pass in rubber stopper 2.
The electrolyte held in housing 1 comprises solute and organic solvent, solute comprises at least one and is selected from lithium hexafluoro phosphate, LiBF4, dioxalic acid lithium borate, the compound of hexafluoroarsenate lithium or the mixture that is made up of above-claimed cpd, formed according to Different Weight percentage mix by wherein one or several, the mass percent of solute is 40% ~ 50%; Preferably, organic solvent comprises at least one and is selected from ethylene carbonate, methyl ethyl carbonate, dimethyl carbonate, diethyl carbonate, the compound of Merlon or the mixture that is made up of above-claimed cpd, is formed according to Different Weight percentage mix by wherein one or several.Appropriate additive can also be added again, improve fail safe and electrical property.
The content composition of Cathode Foil 5 and mass percent thereof are: lithium metal material: 90%-94%; Material with carbon element: 4%-8%; Polytetrafluoroethylene: 1%-5%.The material of making of Cathode Foil 5 comprises lithium metal material and material with carbon element, lithium metal material comprises at least one and is selected from cobalt acid lithium, LiMn2O4, LiFePO4, the compound of nickle cobalt lithium manganate or the mixture that is made up of above-claimed cpd, and namely lithium metal material is formed according to Different Weight percentage mix by wherein one or several; Material with carbon element comprises at least one and is selected from active carbon, carbon black, the compound of CNT (carbon nano-tube) or the mixture that is made up of above-claimed cpd, and namely material with carbon element is formed according to Different Weight percentage mix by wherein one or several.
Lithium metal material, material with carbon element, adhesive, solvent are mixed according to certain ratio, under closed container and inert gas shielding environment, vacuum stirring makes slurry, and even application on foil, then makes Cathode Foil 5 by baking, roll extrusion.
The content composition of anode foils 3 and mass percent thereof are: lithium metal material or carbon anode material: 90%-93%; Material with carbon element: 4%-7%; Polytetrafluoroethylene: 3%-5%.The material of making of anode foils 3 comprises lithium metal material or carbon anode material and material with carbon element, and lithium metal material is lithium titanate; Carbon anode material is native graphite; When monomer voltage is 1.8V or 2.4V, adopt lithium titanate as making anode foils 3, when monomer voltage is 3.2V or 3.7V, adopt native graphite to make anode foils 3.Material with carbon element comprises at least one and is selected from active carbon, CNT (carbon nano-tube), the compound of carbon black or the mixture that is made up of above-claimed cpd, is formed according to Different Weight percentage mix by wherein one or several.
Lithium metal material or carbon anode material, material with carbon element, adhesive, solvent etc. are mixed according to certain ratio; under closed container and inert gas shielding environment; vacuum stirring makes slurry, and even application on foil, then makes anode foils 3 by baking, roll extrusion.
Introduce the super lithium capacitor that multiple different monomers voltage can be provided below further, comprising: the super lithium capacitor of 1.8V, the super lithium capacitor of 2.4V, the super lithium capacitor of 3.2V and the super lithium capacitor of 3.7V.The solute of the electrolyte of above-mentioned four kinds of super lithium capacitor internals adopts the lithium hexafluoro phosphate of 1.2mol/L, and organic solvent is ethylene carbonate.Diaphragm paper 4 is polyethylene film or polypropylene film.
For the super lithium capacitor of 1.8V, the content composition of Cathode Foil 5 and mass percent thereof are: LiFePO4 accounts for 90%-91%, and active carbon accounts for 3%-4%, carbon black accounts for 1%-2%, carbon nano-tube accounts for 1%-2%, and polytetrafluoroethylene accounts for 4%-5%, and the matrix of Cathode Foil 5 adopts aluminium foil.The content composition of anode foils 3 and mass percent thereof are: lithium titanate accounts for 91%-93%, and active carbon accounts for 2%-3%, and carbon black accounts for 1%-2%, and carbon nano-tube accounts for 1%-2%, and polytetrafluoroethylene accounts for 4%-5%, and the matrix of anode foils 3 adopts aluminium foil or Copper Foil.
For the super lithium capacitor of 2.4V, the content of Cathode Foil 5 composition and mass percent thereof are: cobalt acid lithium and LiMn2O4 and nickle cobalt lithium manganate account for 92%-94%, and one or both components wherein can be zero; Active carbon accounts for 2%-3%, and carbon black accounts for 1%-2%, and carbon nano-tube accounts for 1%-2%, and polytetrafluoroethylene accounts for 1%-3%, and the matrix of Cathode Foil 5 adopts aluminium foil.The content composition of anode foils 3 and mass percent thereof are: lithium titanate accounts for 91%-93%, and active carbon accounts for 2%-3%, and carbon black accounts for 1%-2%, and carbon nano-tube accounts for 1%-2%, and polytetrafluoroethylene accounts for 4%-5%, and the matrix of anode foils 3 adopts aluminium foil or Copper Foil.
For the super lithium capacitor of 3.2V, the content composition of Cathode Foil 5 and mass percent thereof are: LiFePO4 accounts for 90%-91%, and active carbon accounts for 3%-4%, carbon black accounts for 1%-2%, carbon nano-tube accounts for 1%-2%, and polytetrafluoroethylene accounts for 4%-5%, and the matrix of Cathode Foil 5 adopts aluminium foil.The content composition of anode foils 3 and mass percent thereof are: native graphite accounts for 90%-92%, and active carbon accounts for 2%-3%; Carbon black accounts for 1%-2%, and carbon nano-tube accounts for 1%-2%; Polytetrafluoroethylene accounts for 3%-5%, and the matrix of anode foils 3 adopts Copper Foil.
For the super lithium capacitor of 3.7V, the content of Cathode Foil 5 composition and mass percent thereof are: cobalt acid lithium and LiMn2O4 and nickle cobalt lithium manganate account for 92%-94%, and one or both components wherein can be zero; Active carbon accounts for 2%-3%, and carbon black accounts for 1%-2%, and carbon nano-tube accounts for 1%-2%, and polytetrafluoroethylene accounts for 1%-3%, and the matrix of Cathode Foil 5 adopts aluminium foil.The content composition of anode foils 3 and mass percent thereof are: native graphite accounts for 90%-92%, and active carbon accounts for 2%-3%; Carbon black accounts for 1%-2%, and carbon nano-tube accounts for 1%-2%, and polytetrafluoroethylene accounts for 3%-5%, and the matrix of anode foils 3 adopts Copper Foil.
In addition, can also by the above-mentioned monomer voltage of series connection, the reality realizing various operating voltage effectively uses.
Be described for the super lithium capacitor of 2.4V14500 type, the content composition of Cathode Foil 5 and mass percent thereof are: cobalt acid lithium: LiMn2O4: active carbon: carbon black: carbon nano-tube: polytetrafluoroethylene=46:46:3:1:2:2, the matrix of Cathode Foil 5 adopts 16 μm of aluminium foils, and it is of a size of 480mm × 41.5mm × 0.089mm.The content composition of anode foils 3 and mass percent thereof are: lithium titanate: active carbon: carbon black: carbon nano-tube: polytetrafluoroethylene=92:3:2:2:4, the matrix of anode foils 3 adopts 16 μm of aluminium foils, and it is of a size of 508mm × 42.5mm × 0.097mm.Diaphragm paper 4 is polyethylene biaxially oriented film, is of a size of 0.020mm × 45mm.
Through batching-coating-roll extrusion-cut-follow closely volume-group vertical-sleeve pipe-change into-aging after, made the super lithium capacitor of multiple 2.4V for carrying out data analysis contrast.Table 1 is the volume result of a sample test of the super lithium capacitor casing of 2.4V; Table 2 is different current discharge capacity of the sample of the super lithium capacitor casing of 2.4V.Data from the sample survey is listed as follows:
The volume data from the sample survey list of the super lithium capacitor casing of table 1.2.4V14500 type
| No. | 1C capacity (mm 3) | Weight (g) | Diameter (mm) | Highly (mm) |
| 1 | 507.7 | 16.63 | 14.14 | 50.49 |
| 2 | 507.3 | 16.60 | 14.13 | 50.38 |
| 3 | 510.9 | 16.66 | 14.14 | 50.44 |
| 4 | 493.4 | 16.69 | 14.17 | 50.36 |
| 5 | 492.0 | 16.61 | 14.13 | 50.47 |
The different current discharge capacity of the sample of the super lithium capacitor casing of table 2.2.4V14500 type
The energy balane formula of super lithium capacitor is: voltage × capacity=energy, and according to the data of above-mentioned list, the super lithium capacitor energy of 2.4V14500 type is: 2.4v × 0.5Ah=1.2Wh.Contrast the ultracapacitor with size, energy balane formula is: energy=1/2 × capacity × voltage × voltage/3600, and specification is the ultracapacitor of 2.5v, 60F, energy i.e. 0.5 × 60 × 2.5 × 2.5/3600=0.052Wh after converting; It can thus be appreciated that the storage power ability of the super lithium capacitor of same size is about 23 times of ultracapacitor storage power ability.
From the data of above-mentioned list also, the efficiency for charge-discharge of each sample when different current discharge capacity, when discharging current promotes 15 times from 1c to 15c, discharging efficiency only declines 3% ~ 7%, as can be seen here, the heavy-current discharge performance of above-mentioned super lithium capacitor is very outstanding, can reach the object that super lithium capacitor realizes fast charging and discharging.
The super lithium capacitor that the embodiment provided by the invention described above is provided, one, the volume energy density of super lithium capacitor, higher than the volume energy density of lithium ion battery, is about its 1.2 times, and far above the volume energy density of super capacitor, be about its 20 ~ 25 times; Its two, super lithium capacitor can realize fast charging and discharging, is better than lithium ion battery, is equal to ultracapacitor; And, the increasing of discharging current, less on the impact of discharging efficiency; Its three, super lithium capacitor is more safe and reliable, and under the destructive testing conditions such as super-charge super-discharge, acupuncture extruding, short circuit, super lithium electric capacity is missing of ignition not to explode; And the super lithium capacitor cycle life-span can reach more than ten thousand times, meet all application demands such as energy storage, power and number completely; Its four, different monomer voltages can be provided, then by mutually connecting between monomer, the reality realizing various operating voltage effectively uses.
The above; be only the present invention's preferably embodiment, but protection scope of the present invention is not limited thereto, any people being familiar with this technology is in the technical scope disclosed by the present invention; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (10)
1. a super lithium capacitor, it comprises: top is provided with the shell for holding electrolyte of rubber stopper, by Cathode Foil, anode foils and separated to described Cathode Foil and the described anode foils diaphragm paper with micropore is overlapped and the battery core reeled and stretch out in described rubber stopper and the positive guide pin be connected with described battery core and negative guide pin, it is characterized in that
Described electrolyte comprises solute and organic solvent, and described solute comprises at least one and is selected from lithium hexafluoro phosphate, LiBF4, dioxalic acid lithium borate, the compound of hexafluoroarsenate lithium or the mixture that is made up of above-claimed cpd; The mass percent of described solute is 40% ~ 50%;
Described Cathode Foil content composition and mass percent thereof are:
Lithium metal material: 90%-94%; Material with carbon element: 4%-8%; Polytetrafluoroethylene: 1%-5%;
Described anode foils content composition and mass percent thereof are:
Lithium metal material or carbon anode material: 90%-93%; Material with carbon element: 4%-7%; Polytetrafluoroethylene: 3%-5%.
2. super lithium capacitor as claimed in claim 1, it is characterized in that, the material of making of described Cathode Foil comprises lithium metal material and material with carbon element, and described lithium metal material comprises at least one and is selected from cobalt acid lithium, LiMn2O4, LiFePO4, the compound of nickle cobalt lithium manganate or the mixture that is made up of above-claimed cpd; Described material with carbon element comprises at least one and is selected from active carbon, carbon black, the compound of CNT (carbon nano-tube) or the mixture that is made up of above-claimed cpd; The material of making of described anode foils comprises lithium metal material or carbon anode material and material with carbon element, and described lithium metal material is lithium titanate; Described carbon anode material is native graphite; Described material with carbon element comprises at least one and is selected from active carbon, CNT (carbon nano-tube), the compound of carbon black or the mixture that is made up of above-claimed cpd.
3. super lithium capacitor as claimed in claim 2, is characterized in that, described Cathode Foil content composition and mass percent thereof are: LiFePO4: 90%-91%; Active carbon: 3%-4%; Carbon black: 1%-2%; Carbon nano-tube: 1%-2%; Polytetrafluoroethylene: 4%-5%; Described anode foils content composition and mass percent thereof are: lithium titanate: 91%-93%; Active carbon: 2%-3%; Carbon black: 1%-2%; Carbon nano-tube: 1%-2%; Polytetrafluoroethylene: 4%-5%.
4. super lithium capacitor as claimed in claim 2, is characterized in that, described Cathode Foil content composition and mass percent thereof are: cobalt acid lithium and and LiMn2O4 and nickle cobalt lithium manganate: 92%-94%; Active carbon: 2%-3%; Carbon black: 1%-2%; Carbon nano-tube: 1%-2%; Polytetrafluoroethylene: 1%-3%; Described anode foils content composition and mass percent thereof are: lithium titanate: 91%-93%; Active carbon: 2%-3%; Carbon black: 1%-2%; Carbon nano-tube: 1%-2%; Polytetrafluoroethylene: 4%-5%.
5. super lithium capacitor as claimed in claim 2, is characterized in that, described Cathode Foil content composition and mass percent thereof are: LiFePO4: 90%-91%; Active carbon: 3%-4%; Carbon black: 1%-2%; Carbon nano-tube: 1%-2%; Polytetrafluoroethylene: 4%-5%; Described anode foils content composition and mass percent thereof are: native graphite: 90%-92%; Active carbon: 2%-3%; Carbon black: 1%-2%; Carbon nano-tube: 1%-2%; Polytetrafluoroethylene: 4%-5%.
6. super lithium capacitor as claimed in claim 2, is characterized in that, cobalt acid lithium and LiMn2O4 and nickle cobalt lithium manganate: 92%-94%; Active carbon: 2%-3%; Carbon black: 1%-2%; Carbon nano-tube: 1%-2%; Polytetrafluoroethylene: 1%-3%; Described anode foils content composition and mass percent thereof are: native graphite: 90%-92%; Active carbon: 2%-3%; Carbon black: 1%-2%; Carbon nano-tube: 1%-2%; Polytetrafluoroethylene: 3%-5%.
7. super lithium capacitor as claimed in claim 1, is characterized in that, the matrix of described Cathode Foil is aluminium foil; The matrix of described anode foils is aluminium foil or Copper Foil.
8. super lithium capacitor as claimed in claim 1, is characterized in that, described diaphragm paper is polyethylene film or polypropylene film.
9. super lithium capacitor as claimed in claim 1, it is characterized in that, described battery core is arranged in order according to the order of anode foils, membrane layer, Cathode Foil, membrane layer.
10. super lithium capacitor as claimed in claim 1, it is characterized in that, described organic solvent comprises at least one and is selected from ethylene carbonate, methyl ethyl carbonate, dimethyl carbonate, diethyl carbonate, the compound of Merlon or the mixture that is made up of above-claimed cpd.
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