Formula and production technology of saggar for firing cathode material for lithium battery
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A positive electrode material, lithium battery technology, applied in the field of refractory materials, can solve the problems of high price, mixing, impossible to use in large quantities, etc., to achieve the effect of reducing production costs and strong corrosion resistance
Inactive Publication Date: 2018-09-28
佛山市骏美特种陶瓷有限公司
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[0004] The consequence of the erosion of the sagger is: the material of the sagger will be mixed into the positive electrode material of the lithium battery, which will seriously affect the performance of the positive electrode material of the lithium battery
[0005] At present, among the mainstream materials for making saggers, ZrO 2 Is the best corrosion resistance, but due to its high price, it is impossible to use it in large quantities
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Embodiment 1
[0037] Embodiment 1: make the saggar with surface composite layer
[0038] 1. Prepare raw materials
[0039] Prepare the raw material for making the surface composite layer according to the surface composite layer formula given before, denote as raw material A, then add a small amount of water in raw material A (the amount of water is specifically 5% of the weight of raw material A), Then put it into the mixing wheel grinding mill for stirring, the stirring time is set to 35min, and finally take it out through a 20-mesh sieve for later use.
[0040] According to the previously given sagger main body formula, the raw materials used to make the sagger main body are obtained, which are recorded as raw material B, and then a small amount of water is added to the raw material B (the amount of water is specifically 5% of the weight of the raw material B), Then put it into the mixing wheel grinding mill for stirring, the stirring time is set to 35min, and finally take it out through...
Embodiment 2
[0047] Embodiment 2: make the sagger without surface composite layer
[0048] 1. Prepare raw materials
[0049] According to the previously given sagger main body formula, the raw materials used to make the sagger main body are obtained, which are recorded as raw material B, and then a small amount of water is added to the raw material B (the amount of water is specifically 5% of the weight of the raw material B), Then put it into the mixing wheel grinding mill for stirring, the stirring time is set to 35min, and finally take it out through a 20-mesh sieve for later use.
[0050] 2. Forming
[0051] Spread 5.6kg of raw material B on the surface of the molding die, press it into a sagger of 320cm x 230cm x 125cm in a 300-ton pressure press with a speed of 350rpm, and let it stand.
[0052] 3. Dry
[0053] After demoulding, the pressed saggar was left to stand in a dry and ventilated room for 24 hours to dry it.
[0054] 4. Firing
[0055] Place the dried sagger in a roller...
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Abstract
The invention discloses a formula and a production technology of a saggar for firing a cathode material for a lithium battery. The formula comprises a surface composite layer formula and a sagger mainbody formula, wherein the surface composite layer formula comprises the following components in percentage by mass: 18 to 22 percent of zircon sand with 200 meshes, 8 to 10 percent of superfine zircon sand with 8000 meshes, 16 to 20 percent of alumina powder with 800 meshes, 16 to 23 percent of cordierite with 100 meshes or below and 30 percent of Suzhou kaolin with 325 meshes; the sagger main body formula comprises 8 to 12 percent of cordierite with 8 to 16 meshes, 20 to 24 percent of cordierite with 16 to 60 meshes, 3 to 7 percent of cordierite with 60 to 100 meshes, 1 to 5 percent of cordierite with 100 meshes or above, 9 to 12 percent of mullite with 16 to 60 meshes, 18 to 22 percent of alumina powder with 800 meshes, 25 percent of No.2 hand-selected Suzhou kaolin with 325 meshes and3 to 5 percent of yellow dextrin. The formula and the production technology disclosed by the invention have the beneficial effects that firstly, in the formula of the saggar, the zircon sand is used to replace ZrO2, and the price of the zircon sand is relatively low, so that the production cost of the saggar is greatly reduced; secondly, the saggar prepared by adopting the formula and the technology disclosed by the invention has a zircon sand composite layer and higher corrosion resistance; thirdly, the economy and the high performance are perfectly unified.
Description
technical field [0001] The invention relates to a formula of a sagger and a manufacturing process thereof. The sagger is used in the firing process of the positive electrode material of a lithium battery to carry the positive electrode material of the lithium battery, and belongs to the technical field of refractory materials. Background technique [0002] In recent years, the rise of new energy vehicles has driven the development of lithium batteries. [0003] In the positive electrode material of lithium battery, the more commonly used is Li 2 CoO 2 . Currently, Li 2 CoO 3 Mainly use Li 2 CO 3 and CoCO 3 Synthetic. During the synthesis process, it needs to be heated to about 900°C, and during the synthesis heating process, the raw materials and finished products are extremely corrosive to the carrying sagger. [0004] The consequence of the sagger being corroded is that the material of the sagger will be mixed into the positive electrode material of the lithium ba...
Claims
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Application Information
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