CN106128764A - A kind of high power capacity non-solid tantalum electrolytic capacitor and preparation method thereof - Google Patents
A kind of high power capacity non-solid tantalum electrolytic capacitor and preparation method thereof Download PDFInfo
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- CN106128764A CN106128764A CN201610416266.3A CN201610416266A CN106128764A CN 106128764 A CN106128764 A CN 106128764A CN 201610416266 A CN201610416266 A CN 201610416266A CN 106128764 A CN106128764 A CN 106128764A
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- tantalum
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- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 title claims abstract description 106
- 229910052715 tantalum Inorganic materials 0.000 title claims abstract description 62
- 239000003990 capacitor Substances 0.000 title claims abstract description 55
- 238000002360 preparation method Methods 0.000 title claims abstract description 27
- 239000007787 solid Substances 0.000 title claims abstract description 20
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 43
- 229910052751 metal Inorganic materials 0.000 claims abstract description 37
- 239000002184 metal Substances 0.000 claims abstract description 37
- 239000002048 multi walled nanotube Substances 0.000 claims abstract description 30
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 19
- 239000011230 binding agent Substances 0.000 claims abstract description 17
- 239000006258 conductive agent Substances 0.000 claims abstract description 17
- 239000010406 cathode material Substances 0.000 claims abstract description 11
- 239000003792 electrolyte Substances 0.000 claims abstract description 8
- 230000036571 hydration Effects 0.000 claims abstract description 8
- 238000006703 hydration reaction Methods 0.000 claims abstract description 8
- 239000007769 metal material Substances 0.000 claims abstract description 8
- 229910001925 ruthenium oxide Inorganic materials 0.000 claims abstract description 8
- WOCIAKWEIIZHES-UHFFFAOYSA-N ruthenium(iv) oxide Chemical compound O=[Ru]=O WOCIAKWEIIZHES-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000000243 solution Substances 0.000 claims description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 24
- 238000003756 stirring Methods 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 19
- 238000005406 washing Methods 0.000 claims description 17
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 14
- 239000002253 acid Substances 0.000 claims description 14
- 150000007513 acids Chemical class 0.000 claims description 14
- 229910052799 carbon Inorganic materials 0.000 claims description 14
- 239000011248 coating agent Substances 0.000 claims description 14
- 238000000576 coating method Methods 0.000 claims description 14
- 239000000084 colloidal system Substances 0.000 claims description 14
- 239000002131 composite material Substances 0.000 claims description 14
- 210000004907 gland Anatomy 0.000 claims description 14
- YBCAZPLXEGKKFM-UHFFFAOYSA-K ruthenium(iii) chloride Chemical compound [Cl-].[Cl-].[Cl-].[Ru+3] YBCAZPLXEGKKFM-UHFFFAOYSA-K 0.000 claims description 14
- 238000005245 sintering Methods 0.000 claims description 14
- 238000000605 extraction Methods 0.000 claims description 13
- 230000003647 oxidation Effects 0.000 claims description 13
- 238000007254 oxidation reaction Methods 0.000 claims description 13
- 238000001914 filtration Methods 0.000 claims description 12
- 229910002804 graphite Inorganic materials 0.000 claims description 8
- 239000010439 graphite Substances 0.000 claims description 8
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 claims description 7
- 239000003513 alkali Substances 0.000 claims description 7
- 238000009835 boiling Methods 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 238000004140 cleaning Methods 0.000 claims description 7
- 239000008367 deionised water Substances 0.000 claims description 7
- 229910021641 deionized water Inorganic materials 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 7
- 239000008151 electrolyte solution Substances 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 7
- 239000011159 matrix material Substances 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 7
- BIXNGBXQRRXPLM-UHFFFAOYSA-K ruthenium(3+);trichloride;hydrate Chemical compound O.Cl[Ru](Cl)Cl BIXNGBXQRRXPLM-UHFFFAOYSA-K 0.000 claims description 7
- 239000000758 substrate Substances 0.000 claims description 7
- PBCFLUZVCVVTBY-UHFFFAOYSA-N tantalum pentoxide Inorganic materials O=[Ta](=O)O[Ta](=O)=O PBCFLUZVCVVTBY-UHFFFAOYSA-N 0.000 claims description 7
- 238000003466 welding Methods 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 3
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 2
- 239000006230 acetylene black Substances 0.000 claims description 2
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 2
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 2
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 2
- -1 conductive black Chemical compound 0.000 claims description 2
- 229950000845 politef Drugs 0.000 claims description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 2
- 238000005304 joining Methods 0.000 claims 1
- 150000003481 tantalum Chemical class 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 12
- 238000005253 cladding Methods 0.000 description 6
- 239000004575 stone Substances 0.000 description 6
- 150000001336 alkenes Chemical class 0.000 description 5
- 239000002023 wood Substances 0.000 description 4
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 2
- 239000003063 flame retardant Substances 0.000 description 2
- 230000005611 electricity Effects 0.000 description 1
- 239000002071 nanotube Substances 0.000 description 1
- 239000007773 negative electrode material Substances 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
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/04—Electrodes or formation of dielectric layers thereon
- H01G9/042—Electrodes or formation of dielectric layers thereon characterised by the material
- H01G9/0425—Electrodes or formation of dielectric layers thereon characterised by the material specially adapted for cathode
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/145—Liquid electrolytic capacitors
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
The invention discloses a kind of high power capacity non-solid tantalum electrolytic capacitor, it includes tantalum anode, negative electrode, tantalum anode, negative electrode are sealed in a metal shell prepared by metal material, and metal shell shell is filled with electrolyte, wherein negative electrode is that tantalum foil is composited with cathode material, and cathode material includes ruthenium oxide hydration 27 73%, multi-walled carbon nano-tubes 16 49%, graphene oxide 5 15%, conductive agent 1 10%, binding agent 3 8% with mass percent.The invention also discloses the preparation method of this high power capacity non-solid tantalum electrolytic capacitor.This tantalum capacitor capacity is high, and energy density is high, and preparation method is simple, and production cost is low.
Description
Technical field:
The present invention relates to capacitor technology field, be specifically related to a kind of high power capacity non-solid tantalum electrolytic capacitor.
Background technology:
Since entering the nineties, the tantalum capacitor yield of electronics industry and auto industry etc. the most rapidly increases
Long.The trend that tantalum capacitor develops to miniaturization, high capacity, slimming and flame retardant type is obvious.To this end, countries in the world are all being exerted
The tantalum powder long-pending for high CV of power exploitation tantalum capacitor.According to document announcement, half in the processed Ta product material that the whole world is consumed every year
Above tantalum powder is used for making tantalum capacitor.
Owing to tantalum capacitor normally can work under conditions of variations in temperature is violent, and its volume is little, capacity
Greatly, bigger than the capacitance of other capacitors of same volume more than 5 times, computer, radar, guided missile, supersonic speed therefore it are widely used in
In the electronic circuit such as aircraft, automaton.Enter the middle and late stage nineties, along with colour TV, PC, automobile sliding galvanic electricity
Words, beeper, video camera, portable phone, the sharply increasing of sonifer yield, the demand to tantalum capacitor will be more vigorous.
These application promote tantalum capacitor to develop to miniaturization, high capacity, slimming and flame retardant type, and this is accomplished by existing tantalum
Capacitor further improves.
Summary of the invention:
It is an object of the invention to provide a kind of high power capacity non-solid tantalum electrolytic capacitor, its capacity is big, and preparation process
In pollution-free, preparation is simple.
It is a further object to provide the preparation method of this high power capacity non-solid tantalum electrolytic capacitor.
For achieving the above object, the present invention is by the following technical solutions:
A kind of high power capacity non-solid tantalum electrolytic capacitor, it includes that tantalum anode, negative electrode, tantalum anode, negative electrode are sealed in
In one metal shell prepared by metal material, and metal shell shell is filled with electrolyte, and wherein negative electrode is that tantalum foil is with cloudy
Pole Material cladding forms, cathode material with mass percent include ruthenium oxide hydration 27-73%, multi-walled carbon nano-tubes 16-49%,
Graphene oxide 5-15%, conductive agent 1-10%, binding agent 3-8%.
The preparation method of a kind of high power capacity non-solid tantalum electrolytic capacitor, comprises the following steps:
(1) prepared by anode:
The compacting of tantalum metal powder is formed round pie, under high temperature and vacuum condition, sinters porous matrix into respectively, then
Carry out anodic oxidation again, all prepare one layer of Ta on its positive and negative two surfaces2O5Deielectric-coating, is then placed in deionized water boiling washing, puts
Enter in baking oven and dry, obtain with Ta2O5Deielectric-coating is the tantalum powder sintering block positive electrode substrate of dielectric；
(2) prepared by negative electrode:
A) multi-walled carbon nano-tubes is dispersed in mixed strong acids stirs, after 80-110 DEG C of high-temperature process 3-10h, take out
Filter, wash, obtain high-hydrophilic multi-walled carbon nano-tubes after drying；
B) hydrate ruthenium trichloride is dissolved in 50-70ml water, obtains solution of ruthenium trichloride, by graphene oxide and step
A) the high-hydrophilic multi-walled carbon nano-tubes ground and mixed prepared is uniform, is then added in solution of ruthenium trichloride, 3000-5000
Rev/min state under stir 0.5-1h, be then transferred in water heating kettle, at 150-200 DEG C react 10-13h, reaction terminates
After, sucking filtration, washing, ethanol are washed, and are then dried 20-24h at 150-200 DEG C, obtain graphene oxide-high-hydrophilic many walls carbon
Nanotube-ruthenium trichloride composite；
C) by tantalum foil through 10MPa tabletting, deoil, alkali cleaning, then remove oxide-film by mixed strong acids, and at 100-200 DEG C
Tantalum foil after being cleaned after being dried 2h；
D) binding agent is obtained colloid solution with the ultrasonic 0.5-1h of N-Methyl pyrrolidone, the oxidation stone obtained by step b)
Ink alkene-high-hydrophilic multi-walled carbon nano-tubes-ruthenium trichloride composite and conductive agent grind uniformly, then supersound process 0.5-1h
After join in colloid solution, stirring 2.5-3.5h after heat be pressed in tantalum foil, through 45-60 DEG C of dry 3-5h, then at 90-120
It is dried 1h at DEG C, sinters 0.5-0.8h at vacuum 170-220 DEG C, obtain negative electrode；
(3) preparation of tantalum capacitor:
The first cathode sheets of capacitor is burn-on and is loaded in metal shell after lead-out wire, then by extraction of burn-oning on anode strip
It is loaded on after line in metal shell, second cathode sheets is loaded in metal shell, and by the lead-out wire and second of the first cathode sheets
The lead-out wire of cathode sheets connects together extraction shell, then pours into electrolyte solution in case body, is then pressed into by gland, lid
Live case body, use laser welding to be sealed with case body by gland, obtain high power capacity tantalum capacitor.
Preferred as technique scheme, in step (1), under described high temperature, the condition of sintering is: temperature is: 1200-
1500 DEG C, sintering time is 30-50min.
Preferred as technique scheme, in step (1), under described vacuum, the condition of sintering is: vacuum is 2 ×
103Within Torr.
Preferred as technique scheme, in step (2), described binding agent include Kynoar, politef,
One or more mixing in polyvinyl alcohol, carboxymethyl cellulose.
Preferred as technique scheme, described conductive agent is acetylene black, electrically conductive graphite, conductive black, Graphene, carbon
One or more mixing in nanotube.
The method have the advantages that
The tantalum capacitor that the present invention provides, negative electrode uses tantalum foil to be composited with cathode material, and conservative control negative electrode material
Material obtains component so that prepared tantalum capacitor capacity is big, and energy density is high；And the preparation method of this tantalum capacitor is simple, work
Skill mild condition, preparation cost is low.
Detailed description of the invention:
In order to be better understood from the present invention, below by embodiment, the present invention is further described, and embodiment is served only for solving
Release the present invention, the present invention will not be constituted any restriction.
Embodiment 1
A kind of high power capacity non-solid tantalum electrolytic capacitor, it includes that tantalum anode, negative electrode, tantalum anode, negative electrode are sealed in
In one metal shell prepared by metal material, and metal shell shell is filled with electrolyte, and wherein negative electrode is that tantalum foil is with cloudy
Pole Material cladding forms, and cathode material includes ruthenium oxide hydration 27%, multi-walled carbon nano-tubes 16%, oxidation stone with mass percent
Ink alkene 5%, conductive agent 1%, binding agent 3%.
Its preparation method comprises the following steps:
(1) prepared by anode:
The compacting of tantalum metal powder is formed round pie, under high temperature and vacuum condition, sinters porous matrix into respectively, then
Carry out anodic oxidation again, all prepare one layer of Ta on its positive and negative two surfaces2O5Deielectric-coating, is then placed in deionized water boiling washing, puts
Enter in baking oven and dry, obtain with Ta2O5Deielectric-coating is the tantalum powder sintering block positive electrode substrate of dielectric；
(2) prepared by negative electrode:
A) multi-walled carbon nano-tubes be dispersed in mixed strong acids stir, after 80 DEG C of high-temperature process 3h, sucking filtration, washing,
Obtain high-hydrophilic multi-walled carbon nano-tubes after drying；
B) hydrate ruthenium trichloride is dissolved in 50ml water, obtains solution of ruthenium trichloride, by graphene oxide and step a)
The high-hydrophilic multi-walled carbon nano-tubes ground and mixed prepared is uniform, is then added in solution of ruthenium trichloride, the shape of 3000 revs/min
Stirring 0.5h under state, be then transferred in water heating kettle, react 10h at 150 DEG C, after reaction terminates, sucking filtration, washing, ethanol are washed,
Then at 150-200 DEG C, it is dried 20h, obtains graphene oxide-high-hydrophilic multi-walled carbon nano-tubes-ruthenium trichloride composite wood
Material；
C) by tantalum foil through 10MPa tabletting, deoil, alkali cleaning, then remove oxide-film by mixed strong acids, and at 100-200 DEG C
Tantalum foil after being cleaned after being dried 2h；
D) binding agent is obtained colloid solution with the ultrasonic 0.5h of N-Methyl pyrrolidone, the graphite oxide obtained by step b)
Alkene-high-hydrophilic multi-walled carbon nano-tubes-ruthenium trichloride composite and conductive agent grind uniformly, then add after supersound process 0.5h
Entering in colloid solution, stirring 2.5h after heat is pressed in tantalum foil, through 45-60 DEG C of dry 3h, is then dried 1h, vacuum at 90 DEG C
Sinter 0.5h at 170 DEG C, obtain negative electrode；
(3) preparation of tantalum capacitor:
The first cathode sheets of capacitor is burn-on and is loaded in metal shell after lead-out wire, then by extraction of burn-oning on anode strip
It is loaded on after line in metal shell, second cathode sheets is loaded in metal shell, and by the lead-out wire and second of the first cathode sheets
The lead-out wire of cathode sheets connects together extraction shell, then pours into electrolyte solution in case body, is then pressed into by gland, lid
Live case body, use laser welding to be sealed with case body by gland, obtain high power capacity tantalum capacitor.
Embodiment 2
A kind of high power capacity non-solid tantalum electrolytic capacitor, it includes that tantalum anode, negative electrode, tantalum anode, negative electrode are sealed in
In one metal shell prepared by metal material, and metal shell shell is filled with electrolyte, and wherein negative electrode is that tantalum foil is with cloudy
Pole Material cladding forms, and cathode material includes ruthenium oxide hydration 73%, multi-walled carbon nano-tubes 49%, oxidation stone with mass percent
Ink alkene 15%, conductive agent 10%, binding agent 8%.
Its preparation method comprises the following steps:
(1) prepared by anode:
The compacting of tantalum metal powder is formed round pie, under high temperature and vacuum condition, sinters porous matrix into respectively, then
Carry out anodic oxidation again, all prepare one layer of Ta on its positive and negative two surfaces2O5Deielectric-coating, is then placed in deionized water boiling washing, puts
Enter in baking oven and dry, obtain with Ta2O5Deielectric-coating is the tantalum powder sintering block positive electrode substrate of dielectric；
(2) prepared by negative electrode:
A) multi-walled carbon nano-tubes is dispersed in mixed strong acids stirs, after 110 DEG C of high-temperature process 10h, sucking filtration, water
Wash, obtain high-hydrophilic multi-walled carbon nano-tubes after drying；
B) hydrate ruthenium trichloride is dissolved in 70ml water, obtains solution of ruthenium trichloride, by graphene oxide and step a)
The high-hydrophilic multi-walled carbon nano-tubes ground and mixed prepared is uniform, is then added in solution of ruthenium trichloride, the shape of 5000 revs/min
Stirring 1h under state, be then transferred in water heating kettle, react 13h at 200 DEG C, after reaction terminates, sucking filtration, washing, ethanol are washed, so
After at 150-200 DEG C be dried 24h, obtain graphene oxide-high-hydrophilic multi-walled carbon nano-tubes-ruthenium trichloride composite；
C) by tantalum foil through 10MPa tabletting, deoil, alkali cleaning, then remove oxide-film by mixed strong acids, and at 100-200 DEG C
Tantalum foil after being cleaned after being dried 2h；
D) binding agent is obtained colloid solution with the ultrasonic 1h of N-Methyl pyrrolidone, the graphite oxide obtained by step b)
Alkene-high-hydrophilic multi-walled carbon nano-tubes-ruthenium trichloride composite and conductive agent grind uniformly, then add after supersound process 1h
In colloid solution, stirring 3.5h after heat is pressed in tantalum foil, through 45-60 DEG C of dry 5h, is then dried 1h, vacuum at 120 DEG C
Sinter 0.8h at 220 DEG C, obtain negative electrode；
(3) preparation of tantalum capacitor:
The first cathode sheets of capacitor is burn-on and is loaded in metal shell after lead-out wire, then by extraction of burn-oning on anode strip
It is loaded on after line in metal shell, second cathode sheets is loaded in metal shell, and by the lead-out wire and second of the first cathode sheets
The lead-out wire of cathode sheets connects together extraction shell, then pours into electrolyte solution in case body, is then pressed into by gland, lid
Live case body, use laser welding to be sealed with case body by gland, obtain high power capacity tantalum capacitor.
Embodiment 3
A kind of high power capacity non-solid tantalum electrolytic capacitor, it includes that tantalum anode, negative electrode, tantalum anode, negative electrode are sealed in
In one metal shell prepared by metal material, and metal shell shell is filled with electrolyte, and wherein negative electrode is that tantalum foil is with cloudy
Pole Material cladding forms, and cathode material includes ruthenium oxide hydration 37%, multi-walled carbon nano-tubes 20%, oxidation stone with mass percent
Ink alkene 7%, conductive agent 3%, binding agent 4%.
Its preparation method comprises the following steps:
(1) prepared by anode:
The compacting of tantalum metal powder is formed round pie, under high temperature and vacuum condition, sinters porous matrix into respectively, then
Carry out anodic oxidation again, all prepare one layer of Ta on its positive and negative two surfaces2O5Deielectric-coating, is then placed in deionized water boiling washing, puts
Enter in baking oven and dry, obtain with Ta2O5Deielectric-coating is the tantalum powder sintering block positive electrode substrate of dielectric；
(2) prepared by negative electrode:
A) multi-walled carbon nano-tubes be dispersed in mixed strong acids stir, after 85 DEG C of high-temperature process 5h, sucking filtration, washing,
Obtain high-hydrophilic multi-walled carbon nano-tubes after drying；
B) hydrate ruthenium trichloride is dissolved in 60ml water, obtains solution of ruthenium trichloride, by graphene oxide and step a)
The high-hydrophilic multi-walled carbon nano-tubes ground and mixed prepared is uniform, is then added in solution of ruthenium trichloride, the shape of 3500 revs/min
Stirring 0.6h under state, be then transferred in water heating kettle, react 11h at 160 DEG C, after reaction terminates, sucking filtration, washing, ethanol are washed,
Then at 150-200 DEG C, it is dried 21h, obtains graphene oxide-high-hydrophilic multi-walled carbon nano-tubes-ruthenium trichloride composite wood
Material；
C) by tantalum foil through 10MPa tabletting, deoil, alkali cleaning, then remove oxide-film by mixed strong acids, and at 100-200 DEG C
Tantalum foil after being cleaned after being dried 2h；
D) binding agent is obtained colloid solution with the ultrasonic 0.6h of N-Methyl pyrrolidone, the graphite oxide obtained by step b)
Alkene-high-hydrophilic multi-walled carbon nano-tubes-ruthenium trichloride composite and conductive agent grind uniformly, then add after supersound process 0.6h
Entering in colloid solution, stirring 3.7h after heat is pressed in tantalum foil, through 45-60 DEG C of dry 3.5h, is then dried 1h at 100 DEG C,
Sinter 0.6h at 180 DEG C of vacuum, obtain negative electrode；
(3) preparation of tantalum capacitor:
The first cathode sheets of capacitor is burn-on and is loaded in metal shell after lead-out wire, then by extraction of burn-oning on anode strip
It is loaded on after line in metal shell, second cathode sheets is loaded in metal shell, and by the lead-out wire and second of the first cathode sheets
The lead-out wire of cathode sheets connects together extraction shell, then pours into electrolyte solution in case body, is then pressed into by gland, lid
Live case body, use laser welding to be sealed with case body by gland, obtain high power capacity tantalum capacitor.
Embodiment 4
A kind of high power capacity non-solid tantalum electrolytic capacitor, it includes that tantalum anode, negative electrode, tantalum anode, negative electrode are sealed in
In one metal shell prepared by metal material, and metal shell shell is filled with electrolyte, and wherein negative electrode is that tantalum foil is with cloudy
Pole Material cladding forms, and cathode material includes ruthenium oxide hydration 47%, multi-walled carbon nano-tubes 36%, oxidation stone with mass percent
Ink alkene 9%, conductive agent 6%, binding agent 5%.
Its preparation method comprises the following steps:
(1) prepared by anode:
The compacting of tantalum metal powder is formed round pie, under high temperature and vacuum condition, sinters porous matrix into respectively, then
Carry out anodic oxidation again, all prepare one layer of Ta on its positive and negative two surfaces2O5Deielectric-coating, is then placed in deionized water boiling washing, puts
Enter in baking oven and dry, obtain with Ta2O5Deielectric-coating is the tantalum powder sintering block positive electrode substrate of dielectric；
(2) prepared by negative electrode:
A) multi-walled carbon nano-tubes be dispersed in mixed strong acids stir, after 90 DEG C of high-temperature process 6h, sucking filtration, washing,
Obtain high-hydrophilic multi-walled carbon nano-tubes after drying；
B) hydrate ruthenium trichloride is dissolved in 70ml water, obtains solution of ruthenium trichloride, by graphene oxide and step a)
The high-hydrophilic multi-walled carbon nano-tubes ground and mixed prepared is uniform, is then added in solution of ruthenium trichloride, the shape of 4000 revs/min
Stirring 0.7h under state, be then transferred in water heating kettle, react 12h at 170 DEG C, after reaction terminates, sucking filtration, washing, ethanol are washed,
Then at 150-200 DEG C, it is dried 22h, obtains graphene oxide-high-hydrophilic multi-walled carbon nano-tubes-ruthenium trichloride composite wood
Material；
C) by tantalum foil through 10MPa tabletting, deoil, alkali cleaning, then remove oxide-film by mixed strong acids, and at 100-200 DEG C
Tantalum foil after being cleaned after being dried 2h；
D) binding agent is obtained colloid solution with the ultrasonic 0.7h of N-Methyl pyrrolidone, the graphite oxide obtained by step b)
Alkene-high-hydrophilic multi-walled carbon nano-tubes-ruthenium trichloride composite and conductive agent grind uniformly, then add after supersound process 0.7h
Entering in colloid solution, stirring 2.9h after heat is pressed in tantalum foil, through 45-60 DEG C of dry 4h, is then dried 1h at 100 DEG C, very
Sinter 0.7h at empty 200 DEG C, obtain negative electrode；
(3) preparation of tantalum capacitor:
The first cathode sheets of capacitor is burn-on and is loaded in metal shell after lead-out wire, then by extraction of burn-oning on anode strip
It is loaded on after line in metal shell, second cathode sheets is loaded in metal shell, and by the lead-out wire and second of the first cathode sheets
The lead-out wire of cathode sheets connects together extraction shell, then pours into electrolyte solution in case body, is then pressed into by gland, lid
Live case body, use laser welding to be sealed with case body by gland, obtain high power capacity tantalum capacitor.
Embodiment 5
A kind of high power capacity non-solid tantalum electrolytic capacitor, it includes that tantalum anode, negative electrode, tantalum anode, negative electrode are sealed in
In one metal shell prepared by metal material, and metal shell shell is filled with electrolyte, and wherein negative electrode is that tantalum foil is with cloudy
Pole Material cladding forms, and cathode material includes ruthenium oxide hydration 57%, multi-walled carbon nano-tubes 40%, oxidation stone with mass percent
Ink alkene 11%, conductive agent 8%, binding agent 6%.
Its preparation method comprises the following steps:
(1) prepared by anode:
The compacting of tantalum metal powder is formed round pie, under high temperature and vacuum condition, sinters porous matrix into respectively, then
Carry out anodic oxidation again, all prepare one layer of Ta on its positive and negative two surfaces2O5Deielectric-coating, is then placed in deionized water boiling washing, puts
Enter in baking oven and dry, obtain with Ta2O5Deielectric-coating is the tantalum powder sintering block positive electrode substrate of dielectric；
(2) prepared by negative electrode:
A) multi-walled carbon nano-tubes is dispersed in mixed strong acids stirs, after 100 DEG C of high-temperature process 8h, sucking filtration, water
Wash, obtain high-hydrophilic multi-walled carbon nano-tubes after drying；
B) hydrate ruthenium trichloride is dissolved in 60ml water, obtains solution of ruthenium trichloride, by graphene oxide and step a)
The high-hydrophilic multi-walled carbon nano-tubes ground and mixed prepared is uniform, is then added in solution of ruthenium trichloride, the shape of 4500 revs/min
Stirring 0.8h under state, be then transferred in water heating kettle, react 13h at 180 DEG C, after reaction terminates, sucking filtration, washing, ethanol are washed,
Then at 150-200 DEG C, it is dried 23h, obtains graphene oxide-high-hydrophilic multi-walled carbon nano-tubes-ruthenium trichloride composite wood
Material；
C) by tantalum foil through 10MPa tabletting, deoil, alkali cleaning, then remove oxide-film by mixed strong acids, and at 100-200 DEG C
Tantalum foil after being cleaned after being dried 2h；
D) binding agent is obtained colloid solution with the ultrasonic 0.8h of N-Methyl pyrrolidone, the graphite oxide obtained by step b)
Alkene-high-hydrophilic multi-walled carbon nano-tubes-ruthenium trichloride composite and conductive agent grind uniformly, then add after supersound process 0.9h
Entering in colloid solution, stirring 3.4h after heat is pressed in tantalum foil, through 45-60 DEG C of dry 4.5h, is then dried 1h at 110 DEG C,
Sinter 0.75h at 210 DEG C of vacuum, obtain negative electrode；
(3) preparation of tantalum capacitor:
The first cathode sheets of capacitor is burn-on and is loaded in metal shell after lead-out wire, then by extraction of burn-oning on anode strip
It is loaded on after line in metal shell, second cathode sheets is loaded in metal shell, and by the lead-out wire and second of the first cathode sheets
The lead-out wire of cathode sheets connects together extraction shell, then pours into electrolyte solution in case body, is then pressed into by gland, lid
Live case body, use laser welding to be sealed with case body by gland, obtain high power capacity tantalum capacitor.
Claims (6)
1. a high power capacity non-solid tantalum electrolytic capacitor, it is characterised in that it includes tantalum anode, negative electrode, tantalum anode, negative electrode
Being sealed in a metal shell prepared by metal material, and metal shell shell is filled with electrolyte, wherein negative electrode is
Tantalum foil is composited with cathode material, and cathode material includes ruthenium oxide hydration 27-73%, multi-walled carbon nano-tubes with mass percent
16-49%, graphene oxide 5-15%, conductive agent 1-10%, binding agent 3-8%.
The preparation method of a kind of high power capacity non-solid tantalum electrolytic capacitor the most as claimed in claim 1, it is characterised in that bag
Include following steps:
(1) prepared by anode:
The compacting of tantalum metal powder is formed round pie, under high temperature and vacuum condition, sinters porous matrix into respectively, enter the most again
Row anodic oxidation, all prepares one layer of Ta on its positive and negative two surfaces2O5Deielectric-coating, is then placed in deionized water boiling washing, puts into baking
Case is dried, obtains with Ta2O5Deielectric-coating is the tantalum powder sintering block positive electrode substrate of dielectric；
(2) prepared by negative electrode:
A) multi-walled carbon nano-tubes is dispersed in mixed strong acids stirs, after 80-110 DEG C of high-temperature process 3-10h, sucking filtration, water
Wash, obtain high-hydrophilic multi-walled carbon nano-tubes after drying；
B) hydrate ruthenium trichloride is dissolved in 50-70ml water, obtains solution of ruthenium trichloride, graphene oxide and step a) are made
The high-hydrophilic multi-walled carbon nano-tubes ground and mixed obtained is uniform, is then added in solution of ruthenium trichloride, 3000-5000 rev/min
State under stir 0.5-1h, be then transferred in water heating kettle, at 150-200 DEG C react 10-13h, reaction terminate after, take out
Filter, washing, ethanol are washed, and are then dried 20-24h at 150-200 DEG C, obtain graphene oxide-high-hydrophilic multi-wall carbon nano-tube
Pipe-ruthenium trichloride composite；
C) by tantalum foil through 10MPa tabletting, deoil, alkali cleaning, then remove oxide-film by mixed strong acids, and be dried at 100-200 DEG C
Tantalum foil after being cleaned after 2h；
D) binding agent is obtained colloid solution with the ultrasonic 0.5-1h of N-Methyl pyrrolidone, the graphite oxide obtained by step b)
Alkene-high-hydrophilic multi-walled carbon nano-tubes-ruthenium trichloride composite and conductive agent grind uniformly, then after supersound process 0.5-1h
Joining in colloid solution, stirring 2.5-3.5h after heat is pressed in tantalum foil, through 45-60 DEG C of dry 3-5h, then at 90-120 DEG C
Under be dried at 1h, vacuum 170-220 DEG C sintering 0.5-0.8h, obtain negative electrode；
(3) preparation of tantalum capacitor:
The first cathode sheets of capacitor is burn-on and is loaded in metal shell after lead-out wire, then by after lead-out wire of burn-oning on anode strip
It is loaded in metal shell, second cathode sheets is loaded in metal shell, and by the lead-out wire of the first cathode sheets and the second negative electrode
The lead-out wire of sheet connects together extraction shell, then pours into electrolyte solution in case body, is then pressed into by gland, outside covering
Shell housing, uses laser welding to be sealed with case body by gland, obtains high power capacity tantalum capacitor.
The preparation method of a kind of high power capacity non-solid tantalum electrolytic capacitor the most as claimed in claim 2, it is characterised in that step
Suddenly, in (1), under described high temperature, the condition of sintering is: temperature is: 1200-1500 DEG C, and sintering time is 30-50min.
The preparation method of a kind of high power capacity non-solid tantalum electrolytic capacitor the most as claimed in claim 2, it is characterised in that step
Suddenly, in (1), under described vacuum, the condition of sintering is: vacuum is 2 × 103Within Torr.
The preparation method of a kind of high power capacity non-solid tantalum electrolytic capacitor the most as claimed in claim 2, it is characterised in that step
Suddenly, in (2), described binding agent includes the one in Kynoar, politef, polyvinyl alcohol, carboxymethyl cellulose or many
Plant mixing.
The preparation method of a kind of high power capacity non-solid tantalum electrolytic capacitor the most as claimed in claim 2, it is characterised in that step
Suddenly, in (2), described conductive agent is that one or more in acetylene black, electrically conductive graphite, conductive black, Graphene, CNT are mixed
Close.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201207335Y (en) * | 2008-05-15 | 2009-03-11 | 中国振华（集团）新云电子元器件有限责任公司 | High temperature capacitor |
| CN101339849B (en) * | 2008-08-08 | 2012-02-08 | 株洲宏达电子有限公司 | Non solid electrolyte all tantalum capacitor and preparation thereof |
| CN105655133A (en) * | 2016-03-30 | 2016-06-08 | 电子科技大学 | Cathode material of composite tantalum capacitor and preparation method of cathode material |
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2016
- 2016-06-14 CN CN201610416266.3A patent/CN106128764A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201207335Y (en) * | 2008-05-15 | 2009-03-11 | 中国振华（集团）新云电子元器件有限责任公司 | High temperature capacitor |
| CN101339849B (en) * | 2008-08-08 | 2012-02-08 | 株洲宏达电子有限公司 | Non solid electrolyte all tantalum capacitor and preparation thereof |
| CN105655133A (en) * | 2016-03-30 | 2016-06-08 | 电子科技大学 | Cathode material of composite tantalum capacitor and preparation method of cathode material |
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