CN206697550U - All-solid lithium-ion battery - Google Patents
All-solid lithium-ion battery Download PDFInfo
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- CN206697550U CN206697550U CN201621242248.XU CN201621242248U CN206697550U CN 206697550 U CN206697550 U CN 206697550U CN 201621242248 U CN201621242248 U CN 201621242248U CN 206697550 U CN206697550 U CN 206697550U
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- 239000007787 solid Substances 0.000 title claims abstract description 27
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 24
- 239000003792 electrolyte Substances 0.000 claims abstract description 17
- 239000007774 positive electrode material Substances 0.000 claims abstract description 17
- 230000007704 transition Effects 0.000 claims abstract description 14
- 239000007773 negative electrode material Substances 0.000 claims abstract description 12
- 229910052744 lithium Inorganic materials 0.000 claims description 22
- 239000000463 material Substances 0.000 claims description 21
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 20
- 239000002131 composite material Substances 0.000 claims description 15
- 229910017052 cobalt Inorganic materials 0.000 claims description 8
- 239000010941 cobalt Substances 0.000 claims description 8
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 8
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 5
- 239000011149 active material Substances 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 229910002804 graphite Inorganic materials 0.000 claims description 4
- 239000010439 graphite Substances 0.000 claims description 4
- 239000004411 aluminium Substances 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052493 LiFePO4 Inorganic materials 0.000 claims description 2
- 229910002097 Lithium manganese(III,IV) oxide Inorganic materials 0.000 claims description 2
- KFDQGLPGKXUTMZ-UHFFFAOYSA-N [Mn].[Co].[Ni] Chemical compound [Mn].[Co].[Ni] KFDQGLPGKXUTMZ-UHFFFAOYSA-N 0.000 claims description 2
- 229910021385 hard carbon Inorganic materials 0.000 claims description 2
- ZAUUZASCMSWKGX-UHFFFAOYSA-N manganese nickel Chemical compound [Mn].[Ni] ZAUUZASCMSWKGX-UHFFFAOYSA-N 0.000 claims description 2
- 229910021384 soft carbon Inorganic materials 0.000 claims description 2
- 125000004646 sulfenyl group Chemical group S(*)* 0.000 claims description 2
- QXZUUHYBWMWJHK-UHFFFAOYSA-N [Co].[Ni] Chemical compound [Co].[Ni] QXZUUHYBWMWJHK-UHFFFAOYSA-N 0.000 claims 1
- 239000007772 electrode material Substances 0.000 description 39
- 239000007784 solid electrolyte Substances 0.000 description 37
- 239000000843 powder Substances 0.000 description 32
- 238000002360 preparation method Methods 0.000 description 12
- 238000005245 sintering Methods 0.000 description 12
- 239000007789 gas Substances 0.000 description 11
- 239000002243 precursor Substances 0.000 description 10
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 9
- 239000012298 atmosphere Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 229910011112 Li7La2 Inorganic materials 0.000 description 6
- 230000001681 protective effect Effects 0.000 description 6
- 239000002253 acid Substances 0.000 description 5
- 238000005253 cladding Methods 0.000 description 5
- 239000000320 mechanical mixture Substances 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 238000000498 ball milling Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 239000004372 Polyvinyl alcohol Substances 0.000 description 3
- 229910052786 argon Inorganic materials 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
- 229910052737 gold Inorganic materials 0.000 description 3
- 239000010931 gold Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000001307 helium Substances 0.000 description 3
- 229910052734 helium Inorganic materials 0.000 description 3
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 3
- 239000011812 mixed powder Substances 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 229920002451 polyvinyl alcohol Polymers 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910005313 Li14ZnGe4O16 Inorganic materials 0.000 description 2
- 229910010685 Li5La3M2O12 Inorganic materials 0.000 description 2
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000002847 impedance measurement Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 229910052758 niobium Inorganic materials 0.000 description 2
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 229910052715 tantalum Inorganic materials 0.000 description 2
- 229910052726 zirconium Inorganic materials 0.000 description 2
- 229910001928 zirconium oxide Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910003327 LiNbO3 Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- 238000000875 high-speed ball milling Methods 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum oxide Inorganic materials [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- -1 organic carbonate esters Chemical class 0.000 description 1
- KTUFCUMIWABKDW-UHFFFAOYSA-N oxo(oxolanthaniooxy)lanthanum Chemical compound O=[La]O[La]=O KTUFCUMIWABKDW-UHFFFAOYSA-N 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 239000013612 plasmid Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000007581 slurry coating method Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052845 zircon Inorganic materials 0.000 description 1
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The purpose of this utility model is to provide all-solid lithium-ion battery, and it sequentially includes：Plus plate current-collecting body (3), positive electrode active material layer (4), First Transition layer (5), solid-state electrolyte layer (6), the second transition zone (7), negative electrode active material layer (8) and negative current collector (9).
Description
Technical field
It the utility model is related to all-solid lithium-ion battery.
Background technology
The power-type lithium ion battery of traditional structure is due to using inflammable and explosive organic carbonate esters electrolyte as having
The Frequent Accidents such as organic electrolytic solution, the battery explosion for causing electrolyte leakage and thus triggering, fire.Lithium is improved at present
The security of ion battery, effective method are exactly to use all-solid-state battery, on the one hand simplify battery safety device and greatly improve
Security reduces cost again simultaneously.
For all-solid-state battery, the interface contact state between solid electrolyte and electrode active material directly affects battery
Performance.Contact mainly between solid electrolyte and electrode active material is bad, increases contact resistance therebetween,
Cause the internal resistance of whole battery excessive, lithium ion can not shuttle well between electrode and electrolyte to be moved, and reduces battery
Capacity, it also result in relatively low durability and higher interface resistance.
The technical scheme of existing solid lithium battery is in one layer of oxide of positive active material Surface coating, such as
Al2O3、LiNbO3Deng, in one layer of oxide of positive active material surface spraying, then heat five hours under oxygen stream,
Obtain the positive active material of oxide cladding.Its advantage is to reduce the space electricity between positive active material and solid electrolyte
Resistance layer, so as to reduce interface impedance.However, it is still with point pair between the positive active material and electrolyte between particle and particle
Point mode contacts, and contact area is small, and internal resistance is big.Therefore it provides one kind can effectively reduce solid-solid interface impedance, manufacture it is easy,
The manufacture method of the new all solid state lithium ion secondary cell of dependable performance, it has also become this area be badly in need of exploitation problem it
One.
Prior art prepares the solid electrolyte of different component to improve its ionic conductivity, but the improvement of ionic conductivity
It is limited.The problem of ionic conductivity is low, and internal resistance is big between electrode active material layer and solid-state electrolyte layer be present.
The content of the invention
The purpose of this utility model be solve lithium ion between solid electrolyte and electrode active material layer electrical conductivity it is low,
The problem of internal resistance is high, multiplying power discharging property is improved, strengthen the stability and cycle performance of solid state lithium battery, improve lithium ion battery
Security.
The present inventor is coated with the electricity of solid electrolyte with method that high temperature sintering is combined using mechanical mixture to prepare
Pole active material, as a result find that the electrode active material for being coated with solid electrolyte can effectively improve the lithium ion at interface
Conduction velocity, interface resistance is reduced, improve the high rate performance and cycle performance of solid state lithium battery, it is new to this completes this practicality
Type.
Specifically, the utility model includes herein below.
[1] combination electrode material, it includes electrode active material layer and is coated on consolidating for the electrode active material layer surface
State dielectric substrate,
Wherein, percentage by weight of the solid electrolyte in the combination electrode material is 0.1%-20%,
The solid electrolyte is the one or more in following formula (1)~formula (4),
Li3xLa(2/3)-xTiO3... formula (1)
In formula (1), 0<x<0.16；
Li14ZnGe4O16... formula (2)
Li5La3M2O12... formula (3)
In formula (3), M is Ta or Nb；
Li7La2Zr2O12... formula (4).
[2] combination electrode material described in above-mentioned [1], wherein, the combination electrode material is composite positive pole or multiple
Negative material is closed, the electrode active material is positive active material or negative electrode active material.
[3] preparation method of combination electrode material, it is the preparation side of the combination electrode material described in above-mentioned [1] or [2]
Method, wherein, solid electrolyte powder is mixed with electrode active material powder, it is uniform by mechanical mixture, then in protection gas
It is sintered in body atmosphere or unprotect atmosphere in 300 DEG C~1200 DEG C, obtains being coated with the electrode active of solid electrolyte
Property material.
[4] preparation method described in above-mentioned [3], wherein, the solid electrolyte powder and the electrode active material powder
The mixed proportion at end is using weight ratio meter as 0.1~20：99.9~80.
[5] preparation method described in above-mentioned [3] or [4], wherein, the solid electrolyte powder is by the way that solid-state is electric
Slurry is made after being mixed with binding agent in solution matter precursor powder, then in protective gas by the slurry coating on the porous material
It is sintered and obtains in 300 DEG C~700 DEG C in atmosphere or unprotect atmosphere.
[6] above-mentioned [3] or [4] preparation method, wherein, the protective gas is selected from argon gas, nitrogen and helium
At least one of.
[7] above-mentioned [3]~preparation method any one of [6], wherein, the sintering time is 1~100 hour.
[8] preparation method of combination electrode material, it is the preparation side of the combination electrode material described in above-mentioned [1] or [2]
Method, wherein, solid electrolyte precursor powder is mixed with electrode active material powder, Ran Hou uniform by mechanical mixture
It is sintered in protective gas atmosphere or unprotect atmosphere in 300 DEG C~1200 DEG C, obtains being coated with solid electrolyte
Electrode active material.
[9] preparation method described in above-mentioned [8], wherein, the solid electrolyte precursor powder and the electrode activity
The mixed proportion of material powder is using weight ratio meter as 0.1~20：99.9~80.
[10] preparation method described in above-mentioned [8] or [9], wherein, the protective gas is selected from argon gas, nitrogen and helium
At least one of gas.
[11] preparation method any one of above-mentioned [8]~[10], wherein, the sintering time is 1~100 small
When.
[12] all-solid lithium-ion battery, it uses the combination electrode material described in above-mentioned [1] or [2].
[13] all-solid lithium-ion battery described in above-mentioned [12], it sequentially includes：Plus plate current-collecting body, positive electrode active material
Matter layer, First Transition layer, solid-state electrolyte layer, the second transition zone, negative electrode active material layer and negative current collector.
[14] all-solid lithium-ion battery described in above-mentioned [13], wherein, the First Transition layer is by positive electrode active material
The composite positive pole layer that matter layer is formed with the solid-state electrolyte layer for being coated on the positive electrode active material layer surface.
[15] all-solid lithium-ion battery described in above-mentioned [13] or [14], wherein, second transition zone is by negative pole
The composite negative pole material layer that active material layer is formed with the solid-state electrolyte layer for being coated on the negative electrode active material layer surface.
Combination electrode material of the present utility model（That is, it is coated with the electrode active material of solid electrolyte）Effectively improve
The conduction velocity of lithium ion, reduces interface resistance, improves the high rate performance and cycle performance of solid state lithium battery.And then
The safety problems such as encapsulation, leakage are not present in solid lithium ion battery of the present utility model, improve the security of battery.
Brief description of the drawings
Fig. 1 is combination electrode material of the present utility model（Transition zone）Schematic diagram, wherein 1 is electrode activity thing plasmid
Son, 2 are solid electrolyte particles.
Fig. 2 is the structural representation of all-solid lithium-ion battery of the present utility model, wherein 3 be plus plate current-collecting body, 4 be just
Pole active material layer, 5 be composite positive pole layer (First Transition layer), and 6 be solid-state electrolyte layer, and 7 be composite negative pole material layer
(the second transition zone), 8 be negative electrode active material layer, and 9 be negative current collector.
Embodiment
Combination electrode material layer of the present utility model includes electrode active material layer and is coated on the electrode active material layer
The solid-state electrolyte layer on surface.
Above-mentioned solid electrolyte is the one or more in following formula (1)~formula (4).That is, formula (1)：
Li3xLa(2/3)-xTiO3(wherein 0<x<0.16)；Formula (2)：Li14ZnGe4O16；Formula (3) Li5La3M2O12(wherein M is Ta or Nb)；
Formula (4)：Li7La2Zr2O12。
Combination electrode material in the utility model can be the composite positive pole or composite negative pole material of solid state lithium battery
Material.
Above-mentioned electrode active material can be positive active material or negative electrode active material.
As positive active material, such as cobalt acid lithium, LiMn2O4, nickel manganese material, LiFePO4, nickel cobalt manganese, nickel can be enumerated
Cobalt aluminium or sulfenyl material etc..
As negative electrode active material, such as lithium metal, hard carbon, soft carbon, graphite, lithium titanate, silica-base material etc. can be enumerated.
Combination electrode material of the present utility model, the electrode active material for being coated with solid electrolyte can be by such as lower sections
It is prepared by method：Solid electrolyte powder is mixed with electrode active material powder, it is uniform by mechanical mixture, then in protective gas
It is sintered in atmosphere or unprotect atmosphere in 300 DEG C~1200 DEG C, obtains being coated with the electrode activity of solid electrolyte
Material.
Above-mentioned protective gas is selected from least one of argon gas, nitrogen and helium.Above-mentioned sintering time is 1~100 small
When, preferably 5~24 hours.
Above-mentioned solid electrolyte powder can also use solid electrolyte precursor powder.The electrode active material powder
Electrode active material precursor powder can also be used.
In above-mentioned preparation method, solid electrolyte powder (or solid electrolyte precursor powder）With electrode activity thing
The mixed proportion of matter powder (or electrode active material precursor powder) is using weight ratio meter as 0.1~20：99.9~80, preferably
For 5~15：95~85.
Above-mentioned mechanical mixture, such as high speed ball milling etc. can be enumerated.
Above-mentioned solid electrolyte is by the way that slurry is made after solid electrolyte presoma is mixed with binding agent, this is starched
Material coating on the porous material, prepared by passing through high temperature sintering.Wherein, the temperature of sintering is 300~700 DEG C.Porous material
For example, porous oxidation zircon ceramic, mesoporous silica gel etc..Binding agent can for example enumerate mass fraction be 1%~10% polyvinyl alcohol or
The ethanol solution of person's polyvinyl butyral resin.
The electrode active material of the present utility model for being coated with solid electrolyte（Composite positive pole or composite negative pole material
Material）, because the contact area of solid electrolyte and electrode active material increases, the ability of lithium ion conducting is effectively increased, is carried
High ionic conductivity between negative or positive electrode active material and solid electrolyte, greatly reduces internal resistance.
All-solid lithium-ion battery of the present utility model sequentially includes：Plus plate current-collecting body, positive electrode active material layer, the first mistake
Cross layer, solid-state electrolyte layer, the second transition zone, negative electrode active material layer and negative current collector.
The formation material of above-mentioned collector can be enumerated selected from copper, magnesium, titanium, iron, cobalt, nickel, zinc, aluminium, germanium, indium, gold, platinum, silver
With a kind of metal in palladium（Metallic monomer）Or include two or more alloys selected from above-mentioned metallic element etc..
The suitable embodiment involved by the utility model is explained above, but the utility model is not limited to above-mentioned side
Formula.Numerous variations can be carried out in the range of the utility model purport is not departed from.
Embodiment
The utility model is further illustrated by the following examples, but the utility model is not limited to these embodiments.
Embodiment 1
Positive pole selects cobalt acid lithium, and negative pole selects lithium titanate, and solid electrolyte selects Li7La2Zr2O12.According to cladding weight ratio
15：85 weigh 0.0882g Li respectively7La2Zr2O12The cobalt acid lithium powder of powder, 0.5g.By above-mentioned powder in mortar manually
It is well mixed, transfer in the ball grinder of zirconium oxide, configure appropriate zirconia ball, carry out ball milling, rotating speed 400r/min, ball milling
Mixed-powder is taken out after 12 hours.Mixed-powder is transferred in oxidation zirconium crucible, crucible is put into Muffle furnace, at 1125 DEG C
It is sintered, 5 DEG C/min of heating rate, sintering time 6 hours.Composite positive pole is obtained after sintering.
Similarly according to cladding weight than 15：85 weigh 0.0882g Li respectively7La2Zr2O12The lithium titanate of powder and 0.5g
Powder, the above method is repeated, obtains composite negative pole material.
According to weight than 8：2 weigh 0.5g Li respectively7La2Zr2O12The polyvinyl alcohol of powder and 0.125g, uniformly mixing
Afterwards, appropriate solvent is added, is tuned into the suitable slurry of concentration, is coated on porous zirconia ceramics piece, is then transferred into Muffle
In stove, it is sintered at 1125 DEG C, 5 DEG C/min of heating rate, sintering time 6 hours, obtains solid electrolyte layer.Described in this example
Electrolyte makees blocking electrode using gold, carries out ac impedance measurement, frequency 10MHz~1Hz, and test result electrical conductivity is 2.5 ×
10-4S/cm。
Using the combination electrode material and Li obtained in the present embodiment 17La2Zr2O12Solid electrolyte intermediate layer assembles to obtain
Solid lithium battery, carries out charge-discharge performance test, and test result shows that solid lithium battery first discharge specific capacity is
Specific discharge capacity conservation rate is 85% after 156mAh g-1 or so, 1C charge and discharge cycles 50 times, and it is small to decline degree.
Embodiment 2
Positive pole selects cobalt acid lithium, and negative pole selects graphite, and solid electrolyte selects Li7La2Zr2O12.According to cladding weight ratio
15：85 weigh the mol ratio 3.5 that total amount is 0.0882g respectively：1：1 three kinds of raw material Lis2CO3、La2O3、ZrO2As
Li7La2Zr2O12Precursor powder, and 0.5g cobalt acid lithium powder.By above-mentioned powder, hand mix is uniform in mortar, retransfers
Into the ball grinder of zirconium oxide, appropriate zirconia ball is configured, carries out ball milling, rotating speed 400r/min, ball milling takes out mixed after 12 hours
Close powder.Mixed-powder is transferred in oxidation zirconium crucible, crucible is put into Muffle furnace, is sintered at 1125 DEG C, is heated up
5 DEG C/min of speed, sintering time 6 hours.Composite positive pole is obtained after sintering.
Similarly according to cladding weight than 15：85 weigh 0.0882g Li respectively7La2Zr2O12Precursor powder, and 0.5g
Graphite, the above method is repeated, obtains composite negative pole material.
According to weight than 8：2 weigh 0.5g Li7La2Zr2O12The polyvinyl alcohol of precursor powder and 0.125g, it is uniformly mixed
After conjunction, appropriate solvent is added, is tuned into the suitable slurry of concentration, is coated on porous zirconia ceramics piece, is then transferred into horse
Not in stove, it is sintered at 1125 DEG C, 5 DEG C/min of heating rate, sintering time 6 hours, then obtains solid electrolyte layer.
Electrolyte described in this example makees blocking electrode using gold, carries out ac impedance measurement, frequency 10MHz~1Hz, test knot
Fruit electrical conductivity is 1.98 × 10-4S/cm。
Using the combination electrode material and Li obtained in the present embodiment 27La2Zr2O12Solid electrolyte intermediate layer assembles to obtain
Solid lithium battery, carries out charge-discharge performance test, and test result shows that solid lithium battery first discharge specific capacity is
Specific discharge capacity conservation rate is 85% after 180mAh g-1 or so, 1C charge and discharge cycles 50 times, and it is small to decline degree.
Claims (5)
1. all-solid lithium-ion battery, it is characterized in that, sequentially include：Plus plate current-collecting body (3), positive electrode active material layer (4), first
Transition zone (5), solid-state electrolyte layer (6), the second transition zone (7), negative electrode active material layer (8) and negative current collector (9).
2. all-solid lithium-ion battery according to claim 1, it is characterized in that, the First Transition layer (5) is by positive pole
The composite positive pole layer that active material layer is formed with the solid-state electrolyte layer for being coated on the positive electrode active material layer surface.
3. all-solid lithium-ion battery according to claim 1 or 2, it is characterized in that, second transition zone (7) is by bearing
The composite negative pole material layer that pole active material layer is formed with the solid-state electrolyte layer for being coated on the negative electrode active material layer surface.
4. all-solid lithium-ion battery according to claim 1 or 2, it is characterized in that, the positive active material is selected from cobalt
Sour lithium, LiMn2O4, nickel manganese material, LiFePO4, nickel cobalt manganese, nickel cobalt aluminium or sulfenyl material.
5. all-solid lithium-ion battery according to claim 1 or 2, it is characterized in that, the negative electrode active material is selected from lithium
Metal, hard carbon, soft carbon, graphite, lithium titanate or silica-base material.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108232108A (en) * | 2017-12-19 | 2018-06-29 | 成都英诺科技咨询有限公司 | A kind of lithium battery anode structure and preparation method thereof, lithium battery structure |
| CN111699583A (en) * | 2018-03-29 | 2020-09-22 | Tdk株式会社 | All-solid-state secondary battery |
-
2016
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108232108A (en) * | 2017-12-19 | 2018-06-29 | 成都英诺科技咨询有限公司 | A kind of lithium battery anode structure and preparation method thereof, lithium battery structure |
| CN108232108B (en) * | 2017-12-19 | 2023-06-30 | 成都大超科技有限公司 | Lithium battery positive electrode structure, preparation method thereof and lithium battery structure |
| CN111699583A (en) * | 2018-03-29 | 2020-09-22 | Tdk株式会社 | All-solid-state secondary battery |
| CN111699583B (en) * | 2018-03-29 | 2023-10-27 | Tdk株式会社 | All-solid secondary battery |
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