Lightweight saggar for roasting positive electrode material of lithium battery and preparation method thereof

Abstract

The invention relates to a lightweight saggar for roasting a positive electrode material of a lithium battery and a preparation method thereof. The invention adopts the technical scheme which is characterized in that the preparation method comprises the following steps: firstly adopting 30-45wt% of spodumene, 30-40wt% of azorite, 10-20wt% of Suzhou soil and 5-10wt% of titanium dioxide as raw materials, adding 4-6wt% of water, and uniformly mixing to prepare glaze; then adopting 45-65wt% of mullite lightweight aggregate, 15-20wt% of kyanite, 10-20wt% of aluminium oxide micropowder and 10-20wt%of Suzhou soil as a mixture, adding a bonding agent with the amount being 10-15wt% of the amount of the mixture, uniformly mixing, and mechanically pressing and molding to obtain a saggar matrix; uniformly distributing the glaze onto the working surface of the bottom part of the saggar matrix, mechanically pressing again, drying, and insulating thermal for 3-10 hours under the condition with the temperature of 1,330-1,400 DEG C to prepare the lightweight saggar for roasting the positive electrode material of the lithium battery. The lightweight saggar and the preparation method have the beneficial effects that the production cost is low and the preparation process is simple; the prepared lightweight saggar for roasting the positive electrode material of the lithium battery is excellent inthermal shock stability, good in erosion resistance and long in service life.

Description

technical field [0001] The invention belongs to the technical field of lightweight saggers. In particular, it relates to a lightweight sagger for firing lithium battery cathode materials and a preparation method thereof. Background technique [0002] Lithium-ion battery is a new type of green high-energy battery developed on the basis of lithium batteries. It is a new generation of green and environmentally friendly batteries, which are widely used in mobile communications, military, aerospace and information science. Lithium-ion cathode materials are the main part of lithium-ion batteries. In the actual production of lithium-ion cathode materials, high-temperature solid-phase synthesis is widely used because of its simple process and low equipment requirements. It is to directly mix the required raw materials in solid form through mechanical stirring, ball milling or tablet pressing, and then undergo high-temperature roasting, cooling and crushing processes to finally obta...

AI Technical Summary

Problems solved by technology

[0003] "Zircon mullite sagger" (ZL201410189300.9) patent technology, a method of preparing saggar with mullite, tabular alumina and zircon sand as raw materials, this method ensures the heat of the sagger from the selection of raw materials shock stability, but the cost of raw materials used is high, which is not conducive to large-scale production and use

The patented technology of "roasting sagger for positive electrode material of circulating lithium battery and its preparation method" (ZL201310194571.9) uses mullite and other raw materials to make the sagger base layer, and uses zirconia and other raw materials to make the working layer. The anti-corrosion performance of the sagger, but the degree of bonding between the base layer and the working layer is insufficient, and the bonding part is easy to crack during use

"A sagger with a high-temperature corrosion-resistant coating for lithium batteries and its preparation method" (CN201610159837.X) patented technology, using mullite, cordierite and micropowder to form a sagger body by pressing, and The surface of the sagger body is impregnated with glaze to make the sagger. This process improves the bonding strength between the glaze and the body through impregnation, but the impregnation step is added on the basis of pressing, which increases the complexity of the production process.