CN114161547A - Forming method of sagger for lithium battery positive electrode material - Google Patents
Forming method of sagger for lithium battery positive electrode material Download PDFInfo
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- CN114161547A CN114161547A CN202111519860.2A CN202111519860A CN114161547A CN 114161547 A CN114161547 A CN 114161547A CN 202111519860 A CN202111519860 A CN 202111519860A CN 114161547 A CN114161547 A CN 114161547A
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- sagger
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- drying
- lithium battery
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000007774 positive electrode material Substances 0.000 title claims description 25
- 238000001035 drying Methods 0.000 claims abstract description 51
- 239000002994 raw material Substances 0.000 claims abstract description 47
- 238000007605 air drying Methods 0.000 claims abstract description 9
- 238000007789 sealing Methods 0.000 claims abstract description 9
- 238000003756 stirring Methods 0.000 claims abstract description 9
- 239000010405 anode material Substances 0.000 claims abstract description 3
- 239000000843 powder Substances 0.000 claims description 16
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 14
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 10
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 9
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 8
- 239000000440 bentonite Substances 0.000 claims description 8
- 229910000278 bentonite Inorganic materials 0.000 claims description 8
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 8
- 239000000395 magnesium oxide Substances 0.000 claims description 8
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 2
- 229920005989 resin Polymers 0.000 claims description 2
- 239000011347 resin Substances 0.000 claims description 2
- 239000002689 soil Substances 0.000 claims description 2
- 239000010406 cathode material Substances 0.000 abstract description 2
- 238000000465 moulding Methods 0.000 description 7
- 239000004927 clay Substances 0.000 description 6
- 229920002050 silicone resin Polymers 0.000 description 6
- 239000011863 silicon-based powder Substances 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 229910052878 cordierite Inorganic materials 0.000 description 2
- 229910052593 corundum Inorganic materials 0.000 description 2
- 239000010431 corundum Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- 230000002194 synthesizing effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 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
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052863 mullite Inorganic materials 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
- B28B11/243—Setting, e.g. drying, dehydrating or firing ceramic articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B17/00—Details of, or accessories for, apparatus for shaping the material; Auxiliary measures taken in connection with such shaping
- B28B17/02—Conditioning the material prior to shaping
- B28B17/026—Conditioning ceramic materials
-
- 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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/56—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides
- C04B35/565—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides based on silicon carbide
-
- 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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
- C04B2235/3206—Magnesium oxides or oxide-forming salts thereof
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3418—Silicon oxide, silicic acids, or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/349—Clays, e.g. bentonites, smectites such as montmorillonite, vermiculites or kaolines, e.g. illite, talc or sepiolite
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/48—Organic compounds becoming part of a ceramic after heat treatment, e.g. carbonising phenol resins
- C04B2235/483—Si-containing organic compounds, e.g. silicone resins, (poly)silanes, (poly)siloxanes or (poly)silazanes
Landscapes
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention discloses a forming method of a sagger for a lithium battery anode material, which comprises the following steps: A. adding the raw materials into a stirrer and stirring to obtain sagger processing raw materials; B. drying the sagger processing raw materials at low temperature, and adding the sagger processing raw materials into a mould for prepressing and forming; C. air-drying the pre-pressed blank and taking out; D. adding the taken blank into a forming die, covering a sealing cover, and then vacuumizing and pressurizing the inside of the forming die for forming; E. and then drying the sagger subjected to pressure forming at low temperature again to obtain the sagger for the lithium battery cathode material.
Description
Technical Field
The invention relates to the technical field of sagger forming, in particular to a forming method of a sagger for a lithium battery positive electrode material.
Background
The sagger used in the process of synthesizing the lithium ion battery anode material is generally a corundum-based, mullite-based, quartz-based and cordierite-based high-temperature resistant sagger. Cordierite and corundum sagger are the most used. However, the raw materials used for synthesizing the lithium ion cathode material can be decomposed in the synthesis process to generate lithium oxide with strong permeability and reactivity to corrode the high-temperature resistant sagger, and on the other hand, when the sagger material is rapidly cooled after high temperature, cracks are easily generated on the sagger along with the increase of the using times, the thermal shock stability of the sagger is damaged, and the service life of the high-temperature resistant sagger can be greatly reduced. In view of the above disadvantages, a new sagger using recrystallized silicon carbide is being gradually substituted for the sagger. The sagger is prepared by adopting recrystallized silicon carbide material, and the sagger is prepared by mixing and molding raw materials to prepare a sagger green body and then calcining the raw material.
The conventional sagger for the lithium battery positive electrode material is low in forming efficiency, low in blank forming density, and capable of influencing the high-temperature mechanical strength of the blank and further influencing the sagger processing quality, so that improvement is needed.
Disclosure of Invention
The invention aims to provide a forming method of a sagger for a lithium battery positive electrode material, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a forming method of a sagger for a lithium battery positive electrode material comprises the following steps:
A. adding the raw materials into a stirrer and stirring to obtain sagger processing raw materials;
B. drying the sagger processing raw materials at low temperature, and adding the sagger processing raw materials into a mould for prepressing and forming;
C. air-drying the pre-pressed blank and taking out;
D. adding the taken blank into a forming die, covering a sealing cover, and then vacuumizing and pressurizing the inside of the forming die for forming;
E. and then drying the sagger subjected to pressure forming at low temperature again to obtain the sagger for the lithium battery positive electrode material.
Preferably, the raw material components in the step A comprise, by weight, 30-40 parts of silicon carbide powder, 10-20 parts of silicon micropowder, 4-10 parts of nano alumina powder, 6-12 parts of magnesium oxide powder, 10-20 parts of Suzhou soil, 8-18 parts of bentonite and 20-30 parts of organic silicon resin.
Preferably, the low-temperature drying temperature in the step B is 70-80 ℃, and the drying time is 30-50 min.
Preferably, the pressure forming pressure in the step D is 400-2And keeping the pressure for 12-14 h.
Preferably, the vacuum degree in the step D is 1300pa to 1500 pa.
Preferably, the low-temperature drying temperature in the step E is 80-110 ℃, and the drying time is 50-70 min.
Compared with the prior art, the invention has the beneficial effects that: the forming method adopted by the invention is simple to operate, and can improve the sagger blank with high density and good pressure resistance, and further improve the processing quality of the subsequent sagger; and the blanks can be prevented from cracking by adopting low-temperature drying twice, so that the blank forming quality is further ensured.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
the invention provides the following technical scheme: a forming method of a sagger for a lithium battery positive electrode material comprises the following steps:
A. adding the raw materials into a stirrer and stirring to obtain sagger processing raw materials;
B. drying the sagger processing raw materials at low temperature, and adding the sagger processing raw materials into a mould for prepressing and forming;
C. air-drying the pre-pressed blank and taking out;
D. adding the taken blank into a forming die, covering a sealing cover, and then vacuumizing and pressurizing the inside of the forming die for forming;
E. and then drying the sagger subjected to pressure forming at low temperature again to obtain the sagger for the lithium battery positive electrode material.
In this embodiment, the raw material components in step a include, by weight, 30 parts of silicon carbide powder, 10 parts of fine silicon powder, 4 parts of nano alumina powder, 6 parts of magnesia powder, 10 parts of suzhou clay, 8 parts of bentonite, and 20 parts of silicone resin.
In this embodiment, the low temperature drying temperature in step B is 70 ℃, and the drying time is 30 min.
In this embodiment, the pressure molding pressure in the step D is 400kgf/cm2And maintaining the pressure for 12 hours.
In this example, the vacuum degree in step D was 1300 pa.
In this embodiment, the low-temperature drying temperature in step E is 80 ℃ and the drying time is 50 min.
Example two:
a forming method of a sagger for a lithium battery positive electrode material comprises the following steps:
A. adding the raw materials into a stirrer and stirring to obtain sagger processing raw materials;
B. drying the sagger processing raw materials at low temperature, and adding the sagger processing raw materials into a mould for prepressing and forming;
C. air-drying the pre-pressed blank and taking out;
D. adding the taken blank into a forming die, covering a sealing cover, and then vacuumizing and pressurizing the inside of the forming die for forming;
E. and then drying the sagger subjected to pressure forming at low temperature again to obtain the sagger for the lithium battery positive electrode material.
In this embodiment, the raw material components in step a include, by weight, 40 parts of silicon carbide powder, 20 parts of silica micropowder, 10 parts of nano-alumina powder, 12 parts of magnesia powder, 20 parts of suzhou clay, 18 parts of bentonite, and 30 parts of silicone resin.
In this embodiment, the low temperature drying temperature in step B is 80 ℃ and the drying time is 50 min.
In this embodiment, the pressure molding pressure in the step D is 700kgf/cm2And maintaining the pressure for 14 h.
In this example, the vacuum degree in step D was 1500 pa.
In this embodiment, the low-temperature drying temperature in step E is 110 ℃, and the drying time is 70 min.
Example three:
a forming method of a sagger for a lithium battery positive electrode material comprises the following steps:
A. adding the raw materials into a stirrer and stirring to obtain sagger processing raw materials;
B. drying the sagger processing raw materials at low temperature, and adding the sagger processing raw materials into a mould for prepressing and forming;
C. air-drying the pre-pressed blank and taking out;
D. adding the taken blank into a forming die, covering a sealing cover, and then vacuumizing and pressurizing the inside of the forming die for forming;
E. and then drying the sagger subjected to pressure forming at low temperature again to obtain the sagger for the lithium battery positive electrode material.
In this embodiment, the raw material components in step a include, by weight, 32 parts of silicon carbide powder, 12 parts of fine silicon powder, 5 parts of nano-alumina powder, 8 parts of magnesia powder, 12 parts of suzhou clay, 10 parts of bentonite, and 22 parts of silicone resin.
In this embodiment, the low-temperature drying temperature in step B is 72 ℃ and the drying time is 35 min.
In this embodiment, the pressure molding pressure in the step D is 450kgf/cm2And maintaining the pressure for 12 hours.
In this example, the vacuum degree in step D was 1350 pa.
In this embodiment, the low-temperature drying temperature in step E is 85 ℃ and the drying time is 55 min.
Example four:
a forming method of a sagger for a lithium battery positive electrode material comprises the following steps:
A. adding the raw materials into a stirrer and stirring to obtain sagger processing raw materials;
B. drying the sagger processing raw materials at low temperature, and adding the sagger processing raw materials into a mould for prepressing and forming;
C. air-drying the pre-pressed blank and taking out;
D. adding the taken blank into a forming die, covering a sealing cover, and then vacuumizing and pressurizing the inside of the forming die for forming;
E. and then drying the sagger subjected to pressure forming at low temperature again to obtain the sagger for the lithium battery positive electrode material.
In this embodiment, the raw material components in step a include, by weight, 38 parts of silicon carbide powder, 18 parts of fine silicon powder, 8 parts of nano-alumina powder, 10 parts of magnesia powder, 18 parts of suzhou clay, 16 parts of bentonite, and 25 parts of silicone resin.
In this embodiment, the low-temperature drying temperature in step B is 78 ℃, and the drying time is 45 min.
In this embodiment, the pressure molding pressure in the step D is 600kgf/cm2And maintaining the pressure for 14 h.
In this example, the vacuum in step D was 1450 pa.
In this embodiment, the low-temperature drying temperature in step E is 105 ℃ and the drying time is 65 min.
Example five:
a forming method of a sagger for a lithium battery positive electrode material comprises the following steps:
A. adding the raw materials into a stirrer and stirring to obtain sagger processing raw materials;
B. drying the sagger processing raw materials at low temperature, and adding the sagger processing raw materials into a mould for prepressing and forming;
C. air-drying the pre-pressed blank and taking out;
D. adding the taken blank into a forming die, covering a sealing cover, and then vacuumizing and pressurizing the inside of the forming die for forming;
E. and then drying the sagger subjected to pressure forming at low temperature again to obtain the sagger for the lithium battery positive electrode material.
In this embodiment, the raw material components in step a include, by weight, 35 parts of silicon carbide powder, 14 parts of fine silicon powder, 8 parts of nano-alumina powder, 9 parts of magnesia powder, 14 parts of suzhou clay, 16 parts of bentonite, and 22 parts of silicone resin.
In this embodiment, the low-temperature drying temperature in step B is 74 ℃ and the drying time is 38 min.
In this embodiment, the pressure molding pressure in the step D is 600kgf/cm2And maintaining the pressure for 14 h.
In this example, the vacuum in step D was 1450 pa.
In this embodiment, the low-temperature drying temperature in step E is 90 ℃ and the drying time is 62 min.
Example six:
a forming method of a sagger for a lithium battery positive electrode material comprises the following steps:
A. adding the raw materials into a stirrer and stirring to obtain sagger processing raw materials;
B. drying the sagger processing raw materials at low temperature, and adding the sagger processing raw materials into a mould for prepressing and forming;
C. air-drying the pre-pressed blank and taking out;
D. adding the taken blank into a forming die, covering a sealing cover, and then vacuumizing and pressurizing the inside of the forming die for forming;
E. and then drying the sagger subjected to pressure forming at low temperature again to obtain the sagger for the lithium battery positive electrode material.
In this embodiment, the raw material components in step a include, by weight, 35 parts of silicon carbide powder, 15 parts of fine silicon powder, 7 parts of nano-alumina powder, 9 parts of magnesia powder, 15 parts of suzhou clay, 13 parts of bentonite, and 25 parts of silicone resin.
In this embodiment, the low temperature drying temperature in step B is 75 ℃ and the drying time is 40 min.
In this embodiment, the pressure molding pressure in the step D is 550kgf/cm2And maintaining the pressure for 13 h.
In this example, the vacuum degree in step D was 1400 Pa.
In this embodiment, the low-temperature drying temperature in step E is 100 ℃, and the drying time is 60 min.
In conclusion, the forming method adopted by the invention is simple to operate, and can improve the sagger blank with high density and good pressure resistance, and further improve the subsequent processing quality of the sagger; and the blanks can be prevented from cracking by adopting low-temperature drying twice, so that the blank forming quality is further ensured.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A forming method of a sagger for a lithium battery anode material is characterized by comprising the following steps: the method comprises the following steps:
A. adding the raw materials into a stirrer and stirring to obtain sagger processing raw materials;
B. drying the sagger processing raw materials at low temperature, and adding the sagger processing raw materials into a mould for prepressing and forming;
C. air-drying the pre-pressed blank and taking out;
D. adding the taken blank into a forming die, covering a sealing cover, and then vacuumizing and pressurizing the inside of the forming die for forming;
E. and then drying the sagger subjected to pressure forming at low temperature again to obtain the sagger for the lithium battery positive electrode material.
2. The method for forming a sagger for a positive electrode material of a lithium battery as claimed in claim 1, wherein: the raw material components in the step A comprise, by weight, 30-40 parts of silicon carbide powder, 10-20 parts of silicon micropowder, 4-10 parts of nano alumina powder, 6-12 parts of magnesium oxide powder, 10-20 parts of Suzhou soil, 8-18 parts of bentonite and 20-30 parts of organic silicon resin.
3. The method for forming a sagger for a positive electrode material of a lithium battery as claimed in claim 1, wherein: and the low-temperature drying temperature in the step B is 70-80 ℃, and the drying time is 30-50 min.
4. The method for forming a sagger for a positive electrode material of a lithium battery as claimed in claim 1, wherein: the pressure forming pressure in the step D is 400-2And keeping the pressure for 12-14 h.
5. The method for forming a sagger for a positive electrode material of a lithium battery as claimed in claim 1, wherein: the vacuum degree in the step D is 1300pa-1500 pa.
6. The method for forming a sagger for a positive electrode material of a lithium battery as claimed in claim 1, wherein: and E, drying at the low temperature of 80-110 ℃ for 50-70 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111519860.2A CN114161547A (en) | 2021-12-13 | 2021-12-13 | Forming method of sagger for lithium battery positive electrode material |
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| CN115536406A (en) * | 2022-09-02 | 2022-12-30 | 洛阳欧斯特新材料有限公司 | Sagger for calcining negative electrode material |
| CN116621591A (en) * | 2023-05-17 | 2023-08-22 | 厦门中科金源新能源科技有限公司 | Sagger for lithium battery anode material and preparation method thereof |
| CN116655394A (en) * | 2023-05-17 | 2023-08-29 | 厦门中科金源新能源科技有限公司 | Double-layer structure sagger for lithium battery anode material and preparation method thereof |
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| CN116655394A (en) * | 2023-05-17 | 2023-08-29 | 厦门中科金源新能源科技有限公司 | Double-layer structure sagger for lithium battery anode material and preparation method thereof |
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