CN113185326A - Kiln furniture spray coating for roasting lithium battery anode material and preparation method thereof - Google Patents
Kiln furniture spray coating for roasting lithium battery anode material and preparation method thereof Download PDFInfo
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- CN113185326A CN113185326A CN202110361928.2A CN202110361928A CN113185326A CN 113185326 A CN113185326 A CN 113185326A CN 202110361928 A CN202110361928 A CN 202110361928A CN 113185326 A CN113185326 A CN 113185326A
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- lithium battery
- roasting
- spray coating
- kiln furniture
- anode material
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- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 73
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 72
- 239000010405 anode material Substances 0.000 title claims abstract description 55
- 238000005507 spraying Methods 0.000 title claims abstract description 48
- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 33
- 239000000292 calcium oxide Substances 0.000 claims abstract description 24
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 24
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000002994 raw material Substances 0.000 claims abstract description 22
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 22
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229910002113 barium titanate Inorganic materials 0.000 claims abstract description 18
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 claims abstract description 18
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 claims abstract description 18
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims abstract description 18
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 8
- 239000002245 particle Substances 0.000 claims abstract description 5
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 5
- 239000007774 positive electrode material Substances 0.000 claims description 12
- 239000010406 cathode material Substances 0.000 claims description 9
- 229910052788 barium Inorganic materials 0.000 claims description 3
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 abstract description 21
- 238000000576 coating method Methods 0.000 abstract description 21
- 238000004519 manufacturing process Methods 0.000 abstract description 15
- 238000005260 corrosion Methods 0.000 abstract description 12
- 230000007797 corrosion Effects 0.000 abstract description 11
- 238000002156 mixing Methods 0.000 abstract description 9
- 238000005516 engineering process Methods 0.000 description 10
- 230000015556 catabolic process Effects 0.000 description 5
- 238000006731 degradation reaction Methods 0.000 description 5
- 239000000919 ceramic Substances 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 239000002086 nanomaterial Substances 0.000 description 4
- 239000012071 phase Substances 0.000 description 4
- 238000012797 qualification Methods 0.000 description 4
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 3
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 3
- 229910010271 silicon carbide Inorganic materials 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000378 calcium silicate Substances 0.000 description 2
- 229910052918 calcium silicate Inorganic materials 0.000 description 2
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- 239000002103 nanocoating Substances 0.000 description 2
- 230000008092 positive effect Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 229910001233 yttria-stabilized zirconia Inorganic materials 0.000 description 2
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 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
- 238000001354 calcination Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 239000002920 hazardous waste Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- FUJCRWPEOMXPAD-UHFFFAOYSA-N lithium oxide Chemical compound [Li+].[Li+].[O-2] FUJCRWPEOMXPAD-UHFFFAOYSA-N 0.000 description 1
- 229910001947 lithium oxide Inorganic materials 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003746 solid phase reaction Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5025—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with ceramic materials
- C04B41/5045—Rare-earth oxides
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
- C04B41/81—Coating or impregnation
- C04B41/85—Coating or impregnation with inorganic materials
- C04B41/87—Ceramics
Abstract
The invention relates to a kiln furniture spray coating for roasting a lithium battery anode material and a preparation method thereof. The technical scheme is as follows: the method comprises the steps of uniformly mixing 90.0-97.0 wt% of zirconium sol, 0.5-2.5 wt% of silica sol, 1.0-5.0 wt% of nano calcium oxide, 0.5-2.0 wt% of barium titanate and 0.3-1.5 wt% of yttrium oxide as raw materials to prepare the kiln coating material for roasting the lithium battery anode material. Wherein: the pH value of the zirconium sol is 7.4-8.6, and ZrO of the zirconium sol2The content is more than or equal to 20.5 wt%; the pH value of the silica sol is 6.5-7.7, and the SiO of the silica sol2The content is more than or equal to 14.7 wt%; the grain size of the nano calcium oxide is less than 32.6 nm; the particle size of the barium titanate is less than 0.045 mm; the grain size of the yttrium oxide is less than 0.01 mm. The invention has the characteristics of simple process, time saving, high efficiency and low production cost; the prepared kiln furniture spray coating for roasting the lithium battery anode material is convenient and fast to construct, good in corrosion resistance and long in service life, and the roasted lithium battery anode material is excellent in performance.
Description
Technical Field
The invention belongs to the technical field of kiln furniture spray coating. In particular to kiln furniture spray coating for roasting lithium battery anode materials and a preparation method thereof.
Background
The lithium ion battery is widely applied to the fields of 3C digital products, energy storage, automobile power and the like, and mainly comprises four parts, namely an anode, a cathode, a diaphragm and electrolyte. Wherein the consumption of the anode material is up to 30-40%. The positive electrode material of the lithium battery is composed of Li, Co, Mn, Ni and the like, and the preparation process is generally that raw material substances are arranged in a saggar and are sintered at 400-1000 ℃. In the high-temperature solid-phase reaction process, the roller kiln is frequently adopted due to the advantages of easy control of atmosphere, uniform temperature field, large yield, low cost, convenience in realizing automation and the like. At present, the lithium battery anode material is formed by loading and calcining a sagger, and the service life of the sagger is 20-30 heats. Because the service life of the sagger is short, the roasting efficiency of the anode material is greatly limited, and the capacity of related battery production enterprises is influenced; on the other hand, the properties of the fired cathode material are affected due to the interaction between the cathode material and the saggar and the penetration of the cathode material into the saggar microstructure, and the waste saggars become solid hazardous wastes which are difficult to treat, thus causing huge pressure on the environment.
Because the corrosion resistance of the conventional sagger material cannot meet the requirement of frequent roasting of the lithium battery cathode material, most of the sagger technical improvement methods adopt mechanical pressing or coating an anti-corrosion layer with a certain thickness to isolate the direct contact between the sagger and the cathode material. The prior sagger coating technology for roasting the lithium battery anode material, such as the patent technology of 'a sagger with a lithium battery high-temperature corrosion resistant coating and a preparation method thereof' (CN105777090A), discloses a technology for preparing a lithium battery high-temperature corrosion resistant coating by taking alumina, silica, magnesia, zirconia and lithium oxide as main raw materials, and the technology is manual coating and airing, and has complicated procedures and high manufacturing cost; for example, the patent technology of 'a sagger for a lithium battery positive electrode material with high yield and a manufacturing method thereof' (CN110451944A) discloses a technology for preparing a coating for the sagger for the lithium battery positive electrode material by using silicon carbide and polyacrylic ester as main raw materials, the technology also needs manual coating and airing, the procedure is complicated, a non-oxide coating is easy to oxidize and peel off, and potential safety hazards exist in the using process; for example, the patent technology of 'a high-temperature resistant sagger and a preparation method thereof' (CN111233482A) discloses a technology for preparing a coating for a lithium battery cathode material sagger by using silicon carbide, magnesium oxide, polyacrylate, talcum powder and graphite as main raw materials, the technology needs secondary machine pressing to form the coating, the interface compatibility between the coating and the sagger is poor, the thickness of the coating is 1-2 mm, and the silicon carbide, the graphite and other electrodes are easy to be oxidized to be stripped and pollute the baked cathode material.
In summary, the technical defects are as follows: the process is complex and the production cost is high, so that the physical/chemical reaction between the lithium battery anode material and kiln furniture (such as a saggar) during roasting cannot be avoided fundamentally, the pretreatment time of the roasting kiln furniture is prolonged, and the production efficiency is reduced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and aims to provide a preparation method of a kiln furniture spray coating for roasting a lithium battery positive electrode material, which is simple in process, time-saving, efficient and low in production cost. The kiln furniture spray coating for roasting the lithium battery anode material prepared by the method has convenient construction, good corrosion resistance and long service life, and can fundamentally solve the problem of performance degradation of the battery anode material in the roasting process.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: the method comprises the steps of uniformly mixing 90.0-97.0 wt% of zirconium sol, 0.5-2.5 wt% of silica sol, 1.0-5.0 wt% of nano calcium oxide, 0.5-2.0 wt% of barium titanate and 0.3-1.5 wt% of yttrium oxide as raw materials to prepare the kiln coating material for roasting the lithium battery anode material.
The pH value of the zirconium sol is 7.4-8.6; ZrO of zirconium sol2The content is more than or equal to 20.5 wt%.
The pH value of the silica sol is 6.5-7.7; SiO of silica sol2The content is more than or equal to 14.7wt percent.
The grain size of the nano calcium oxide is less than 32.6 nm; the CaO content of the nano calcium oxide is more than or equal to 99.5 wt%.
The particle size of the barium titanate is less than 0.01 mm; BaTiO of barium titanate3The content is more than or equal to 98.9wt percent.
The grain size of the yttrium oxide is less than 0.01 mm; y of yttria2O3The content of (B) is more than or equal to 99.1 wt%.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following positive effects:
1. the invention takes zirconium sol, silica sol, nano calcium oxide, barium titanate and yttrium oxide as raw materials, and the raw materials are uniformly mixed to obtain the kiln furniture spray coating (hereinafter referred to as spray coating) for roasting the lithium battery anode material, and the process is simple and the production cost is low. The invention has no limit to the shape and the roasting mode of the kiln furniture, and the kiln furniture can be used after being sprayed; in the later maintenance process, only the contact surface of the kiln furniture and the lithium battery anode material needs to be subjected to supplementary spraying, large-area removal or replacement is not needed, the production cost can be effectively reduced, the maintenance period can be shortened, and the construction is convenient, time-saving and efficient.
2. The invention is suitable for isolating direct contact between the lithium battery anode material and kiln furniture during roasting, wherein the kiln furniture is more than one of a sagger, a cover plate, a shed plate and a ceramic cart; the coating with the micro-nano structure formed by the spray coating can effectively isolate the reaction between the lithium battery anode material and the kiln furniture, and can effectively improve the cycle times of the kiln furniture and prolong the service life of the kiln furniture by isolating the direct contact between the lithium battery anode material and the kiln furniture; the invention has no special requirements on the roasting kiln body, can be used together with a shuttle kiln, a pushed slab kiln and a tunnel kiln, and has wider application range.
3. The spray coating prepared by the invention is of a micro-nano structure, and a firmly-attached protective layer is formed by a micro-nano coating formed after the kiln furniture is roasted through capillary permeation, so that the corrosion resistance of the kiln furniture for roasting can be effectively enhanced. In the high-temperature use process, the coating forms a new phase formed by firm ceramic combination, such as zirconium silicate, yttria-stabilized zirconia and calcium silicate, and the new phase has high corrosion resistance, high volume stability, strong anti-stripping performance and no pollution to the roasted lithium battery anode material, can fundamentally solve the problem of performance degradation of the lithium battery anode material in the firing process, and is beneficial to improving the qualification rate of the lithium battery anode material. The coating has good matching performance with the expansion coefficient of the kiln furniture structure, stable production can be realized, the qualification rate of finished products is improved, and subsequent use safety accidents of the lithium battery are avoided.
Therefore, the invention has the characteristics of simple process, time saving, high efficiency and low production cost; the prepared kiln furniture spray coating for roasting the lithium battery anode material is convenient to construct, good in corrosion resistance and long in service life, and can fundamentally solve the problem of performance degradation of the lithium battery anode material in the roasting process.
Detailed Description
The invention is further described with reference to specific embodiments, which do not limit the scope of the invention.
A kiln furniture spray coating for roasting a lithium battery anode material and a preparation method thereof. The preparation method of the embodiment comprises the following steps: the method comprises the steps of uniformly mixing 90.0-97.0 wt% of zirconium sol, 0.5-2.5 wt% of silica sol, 1.0-5.0 wt% of nano calcium oxide, 0.5-2.0 wt% of barium titanate and 0.3-1.5 wt% of yttrium oxide as raw materials to prepare the kiln coating material for roasting the lithium battery anode material.
In this embodiment:
the pH value of the zirconium sol is 7.4-8.6; ZrO of zirconium sol2The content is more than or equal to 20.5 wt%.
The pH value of the silica sol is 6.5-7.7; SiO of silica sol2The content is more than or equal to 14.7wt percent.
The grain size of the nano calcium oxide is less than 32.6 nm; the CaO content of the nano calcium oxide is more than or equal to 99.5 wt%.
The particle size of the barium titanate is less than 0.01 mm; BaTiO of barium titanate3The content is more than or equal to 98.9wt percent.
The grain size of the yttrium oxide is less than 0.01 mm; y of yttria2O3The content of (B) is more than or equal to 99.1 wt%.
The embodiment is not described again:
example 1
A kiln furniture spray coating for roasting a lithium battery anode material and a preparation method thereof. The method comprises the steps of uniformly mixing 90.0 wt% of zirconium sol, 2.5 wt% of silica sol, 5.0 wt% of nano calcium oxide, 2.0 wt% of barium titanate and 0.5 wt% of yttrium oxide serving as raw materials to prepare the kiln tool spray coating for roasting the lithium battery anode material.
Example 2
A kiln furniture spray coating for roasting a lithium battery anode material and a preparation method thereof. The method comprises the steps of uniformly mixing 92.0 wt% of zirconium sol, 2.1 wt% of silica sol, 3.0 wt% of nano calcium oxide, 1.5 wt% of barium titanate and 1.4 wt% of yttrium oxide serving as raw materials to prepare the kiln tool spray coating for roasting the lithium battery anode material.
Example 3
A kiln furniture spray coating for roasting a lithium battery anode material and a preparation method thereof. The kiln furniture spray coating for roasting the lithium battery anode material is prepared by uniformly mixing 94.0 wt% of zirconium sol, 1.0 wt% of silica sol, 3.2 wt% of nano calcium oxide, 0.7 wt% of barium titanate and 1.1 wt% of yttrium oxide serving as raw materials.
Example 4
A kiln furniture spray coating for roasting a lithium battery anode material and a preparation method thereof. The method comprises the steps of uniformly mixing 96.0 wt% of zirconium sol, 1.5 wt% of silica sol, 1.5 wt% of nano calcium oxide, 0.7 wt% of barium titanate and 0.3 wt% of yttrium oxide as raw materials to prepare the kiln tool spray coating for roasting the lithium battery anode material.
Example 5
A kiln furniture spray coating for roasting a lithium battery anode material and a preparation method thereof. 93.0 wt% of zirconium sol, 1.5 wt% of silica sol, 2.5 wt% of nano calcium oxide, 2.0 wt% of barium titanate and 1.0 wt% of yttrium oxide are used as raw materials, and the raw materials are uniformly mixed to prepare the kiln tool spray coating for roasting the lithium battery anode material.
Example 6
A kiln furniture spray coating for roasting a lithium battery anode material and a preparation method thereof. The method comprises the steps of uniformly mixing 91.0 wt% of zirconium sol, 1.6 wt% of silica sol, 4.0 wt% of nano calcium oxide, 1.9 wt% of barium titanate and 1.5 wt% of yttrium oxide as raw materials to prepare the kiln tool spray coating for roasting the lithium battery anode material.
Example 7
A kiln furniture spray coating for roasting a lithium battery anode material and a preparation method thereof. The method comprises the following steps of uniformly mixing 95.0 wt% of zirconium sol, 0.7 wt% of silica sol, 2.8 wt% of nano calcium oxide, 0.9 wt% of barium titanate and 0.6 wt% of yttrium oxide serving as raw materials to prepare the kiln tool spray coating for roasting the lithium battery anode material.
Example 8
A kiln furniture spray coating for roasting a lithium battery anode material and a preparation method thereof. 97.0 wt% of zirconium sol, 0.5 wt% of silica sol, 0.5 wt% of nano calcium oxide, 0.5 wt% of barium titanate and 1.5 wt% of yttrium oxide are used as raw materials, and the raw materials are uniformly mixed to prepare the kiln tool spray coating for roasting the lithium battery anode material.
The kiln furniture spray coating materials for roasting the lithium battery positive electrode materials prepared in the embodiments 1 to 8 are respectively sprayed on the surface of a rotary kiln lining, then the roasting of the lithium battery positive electrode material lithium iron phosphate is carried out, the residual impurity content and the apparent density of the roasted lithium iron phosphate are measured, and the lithium battery positive electrode material which is not sprayed by the spray coating material and is directly contacted with the rotary kiln lining for roasting, namely the lithium iron phosphate (comparative example), is compared under the same conditions, and the detection results are shown in table 1.
TABLE 1
Compared with the prior art, the invention has the following positive effects:
1. the invention takes zirconium sol, silica sol, nano calcium oxide, barium titanate and yttrium oxide as raw materials, and the raw materials are uniformly mixed to obtain the kiln furniture spray coating (hereinafter referred to as spray coating) for roasting the lithium battery anode material, and the process is simple and the production cost is low. The invention has no limit to the shape and the roasting mode of the kiln furniture, and the kiln furniture can be used after being sprayed; in the later maintenance process, only the contact surface of the kiln furniture and the lithium battery anode material needs to be subjected to supplementary spraying, large-area removal or replacement is not needed, the production cost can be effectively reduced, the maintenance period can be shortened, and the construction is convenient, time-saving and efficient.
2. The invention is suitable for isolating direct contact between the lithium battery anode material and kiln furniture during roasting, wherein the kiln furniture is more than one of a sagger, a cover plate, a shed plate and a ceramic cart; the coating with the micro-nano structure formed by the spray coating can effectively isolate the reaction between the lithium battery anode material and the kiln furniture, and can effectively improve the cycle times of the kiln furniture and prolong the service life of the kiln furniture by isolating the direct contact between the lithium battery anode material and the kiln furniture; the invention has no special requirements on the roasting kiln body, can be used together with a shuttle kiln, a pushed slab kiln and a tunnel kiln, and has wider application range.
3. The spray coating prepared by the invention is of a micro-nano structure, and a firmly-attached protective layer is formed by a micro-nano coating formed after the kiln furniture is roasted through capillary permeation, so that the corrosion resistance of the kiln furniture for roasting can be effectively enhanced. In the high-temperature use process, the coating forms a new phase formed by firm ceramic combination, such as zirconium silicate, yttria-stabilized zirconia and calcium silicate, and the new phase has high corrosion resistance, high volume stability, strong anti-stripping performance and no pollution to the roasted lithium battery anode material, can fundamentally solve the problem of performance degradation of the lithium battery anode material in the firing process, and is beneficial to improving the qualification rate of the lithium battery anode material. The coating has good matching performance with the expansion coefficient of the kiln furniture structure, stable production can be realized, the qualification rate of finished products is improved, and the subsequent use safety accidents of the lithium battery are avoided.
Therefore, the invention has the characteristics of simple process, time saving, high efficiency and low production cost; the prepared kiln furniture spray coating for roasting the lithium battery anode material is convenient to construct, good in corrosion resistance and long in service life, and can fundamentally solve the problem of performance degradation of the lithium battery anode material in the roasting process.
Claims (7)
1. The preparation method of the kiln furniture spray coating for roasting the lithium battery anode material is characterized in that 90.0-97.0 wt% of zirconium sol, 0.5-2.5 wt% of silica sol, 1.0-5.0 wt% of nano calcium oxide, 0.5-2.0 wt% of barium titanate and 0.3-1.5 wt% of yttrium oxide are used as raw materials and are uniformly mixed to prepare the kiln furniture spray coating for roasting the lithium battery anode material.
2. The preparation method of the kiln furniture spray coating for roasting the lithium battery positive electrode material as claimed in claim 1, wherein the pH value of the zirconium sol is 7.4-8.6; ZrO of zirconium sol2The content is more than or equal to 20.5 wt%.
3. The preparation method of the kiln furniture spray coating for roasting the lithium battery positive electrode material as claimed in claim 1, wherein the pH value of the silica sol is 6.5-7.7; SiO of silica sol2The content is more than or equal to 14.7wt percent.
4. The method for preparing the kiln furniture spray coating material for roasting the lithium battery cathode material as claimed in claim 1, wherein the particle size of the nano calcium oxide is less than 32.6 nm; the CaO content of the nano calcium oxide is more than or equal to 99.5 wt%.
5. The method for preparing the kiln furniture spray coating for roasting the lithium battery positive electrode material as claimed in claim 1, wherein the particle size of the barium titanate is less than 0.01 mm; BaTiO of barium titanate3The content is more than or equal to 98.9wt percent.
6. The method for preparing the kiln furniture spray coating material for roasting the lithium battery cathode material as claimed in claim 1, wherein the grain size of the yttrium oxide is less than 0.01 mm; y of yttria2O3The content of (B) is more than or equal to 99.1 wt%.
7. A kiln furniture spray coating for roasting a lithium battery positive electrode material is characterized by being prepared by the preparation method of the kiln furniture spray coating for roasting the lithium battery positive electrode material according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110361928.2A CN113185326A (en) | 2021-04-02 | 2021-04-02 | Kiln furniture spray coating for roasting lithium battery anode material and preparation method thereof |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003226586A (en) * | 2002-02-05 | 2003-08-12 | Kyushu Refract Co Ltd | Tool for firing electronic part |
| CN1938241A (en) * | 2004-03-31 | 2007-03-28 | 三井金属矿业株式会社 | Jig for electronic part firing |
| US20080090071A1 (en) * | 2004-10-21 | 2008-04-17 | Commissariat A L'energie Atomique | Nanosturctured Coating and Coating Method |
| CN104446457A (en) * | 2014-11-18 | 2015-03-25 | 潮州三环（集团）股份有限公司 | Modified zirconium oxide ceramic material and application thereof |
| CN105418164A (en) * | 2015-11-11 | 2016-03-23 | 安吉科灵磁性材料有限公司 | Preparation method of silicon carbide ceramic kiln furniture coated with yttria-stabilized zirconia coating |
| CN109824359A (en) * | 2019-04-19 | 2019-05-31 | 中铂传感器(太仓)有限公司 | A kind of Sol-gel Coated modified zirconia ceramic material and preparation method thereof |
| US20190382315A1 (en) * | 2017-02-02 | 2019-12-19 | Liming Zhang | Fused and crushed thermal coating powder, system for providing thermal spray coating, and associated method |
| CN110746805A (en) * | 2019-10-25 | 2020-02-04 | 山东友邦科思茂新材料有限公司 | Coating for lithium ion battery anode material sintering saggar and preparation method thereof |
-
2021
- 2021-04-02 CN CN202110361928.2A patent/CN113185326A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003226586A (en) * | 2002-02-05 | 2003-08-12 | Kyushu Refract Co Ltd | Tool for firing electronic part |
| CN1938241A (en) * | 2004-03-31 | 2007-03-28 | 三井金属矿业株式会社 | Jig for electronic part firing |
| US20080090071A1 (en) * | 2004-10-21 | 2008-04-17 | Commissariat A L'energie Atomique | Nanosturctured Coating and Coating Method |
| CN104446457A (en) * | 2014-11-18 | 2015-03-25 | 潮州三环（集团）股份有限公司 | Modified zirconium oxide ceramic material and application thereof |
| CN105418164A (en) * | 2015-11-11 | 2016-03-23 | 安吉科灵磁性材料有限公司 | Preparation method of silicon carbide ceramic kiln furniture coated with yttria-stabilized zirconia coating |
| US20190382315A1 (en) * | 2017-02-02 | 2019-12-19 | Liming Zhang | Fused and crushed thermal coating powder, system for providing thermal spray coating, and associated method |
| CN109824359A (en) * | 2019-04-19 | 2019-05-31 | 中铂传感器(太仓)有限公司 | A kind of Sol-gel Coated modified zirconia ceramic material and preparation method thereof |
| CN110746805A (en) * | 2019-10-25 | 2020-02-04 | 山东友邦科思茂新材料有限公司 | Coating for lithium ion battery anode material sintering saggar and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| B. YANG ET AL.: "Effect of BaTiO3 addition on structures and mechanical properties of 3Y-TZP ceramics", 《JOURNAL OF THE EUROPEAN CERAMIC SOCIETY》 * |
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Application publication date: 20210730 |