Circulating lithium battery positive-electrode material roasting saggar surface working layer

Abstract

The invention discloses and provides a circulating lithium battery positive-electrode material roasting saggar surface working layer having the advantages of simple making, avoiding of the pollution of a lithium battery material because of the difficult reacting with the lithium battery material, and no environmental pollution. The surface working layer is composed of 70-90 parts by weight of zirconia, 1-5 parts by weight of cerium oxide, 1-10 parts by weight of spodumene, 5-15 parts by weight of corundum, a binder having a mass being 3-8% of the total mass of zirconia, cerium oxide, spodumene and corundum, and water having a mass being 5-10% of the total mass of zirconia, cerium oxide, spodumene and corundum. The surface working layer can be widely applied to the lithium ion battery positive-electrode material saggar field.

Description

technical field [0001] The invention relates to a working layer on the surface of a roasted sagger for a circulating lithium battery positive electrode material. Background technique [0002] At present, lithium battery cathode materials are calcined at high temperature by using saggers to carry materials. Generally, saggers are used to carry lithium carbonate and metal oxides (manganese, cobalt, nickel, etc.) for high-temperature reaction. Li 2 O has a certain chemical reaction with the acidic oxide silica and amphoteric oxide aluminum oxide in the surface layer of the sagger to produce a glassy substance, the main components of which are (LiAlO 2、 Li 2 OSoO 2 , Li 4 SiO 4 , LiAlSiO 4、 (LiCoO 2 ).RR, Li 2 4Mg 0.8 SiO 4 etc.), the average index of sagger consumption at home and abroad is 200--300 kg per ton of positive electrode materials. In 2011 alone, the production of positive electrode materials for lithium batteries in China consumed more than 34,000 tons of...

AI Technical Summary

Problems solved by technology

[0002] At present, lithium battery cathode materials are calcined at high temperature by using saggers to carry materials. Generally, saggers are used to carry lithium carbonate and metal oxides (manganese, cobalt, nickel, etc.) for high-temperature reaction. Li 2 O has a certain chemical reaction with the acidic oxide silica and amphoteric oxide aluminum oxide in the surface layer of the sagger to produce a glassy substance, the main components of which are (LiAlO 2、 Li 2 OSoO 2 , Li 4 SiO 4 , LiAlSiO 4、 (LiCoO 2 ).RR, Li 2 4Mg 0.8 SiO 4 etc.), the average index of sagger consumption at home and abroad is 200--300 kg per ton of positive electrode materials. In 2011 alone, the production of positive electrode materials for lithium batteries in China consumed more than 34,000 tons of saggers. Saggers are reused by cold and hot. Generally use 20-30 times will be scrapped

Existing saggers generally have two structures, one is made of a composite material with a single structure, but this kind of sagger will be infiltrated and polluted by the positive electrode material of the lithium battery after use, resulting in a small amount of dust on the surface of the sagger The positive electrode material cannot be cleaned up and can only be buried. In this way, the discarded sagger becomes industrial waste. Once buried underground, it will inevitably cause heavy metal pollution, while the other is divided into two layers. structure, that is, spraying on the surface of the substrate layer, but after this structure is used for a certain number of times, the physical and chemical properties of the sprayed layer on the surface of the sagger and the substrate will change, and the surface of the sagger will start to peel off, which will not only pollute the positive electrode material It is relatively low, and it is easy to cause safety accidents of subsequent lithium batteries