Method for preparing negative electrode materials of lithium batteries from waste and old zinc-manganese batteries

A zinc-manganese battery and negative electrode material technology, applied in battery electrodes, battery recycling, recycling technology, etc., to achieve the effect of simple method, simple method and good application prospect

Active Publication Date: 2013-06-12
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, direct hydrothermal synthesis of lithium battery anode material ZnMn using zinc and manganese waste 2 o 4 Not yet reported

Method used

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  • Method for preparing negative electrode materials of lithium batteries from waste and old zinc-manganese batteries
  • Method for preparing negative electrode materials of lithium batteries from waste and old zinc-manganese batteries
  • Method for preparing negative electrode materials of lithium batteries from waste and old zinc-manganese batteries

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Weigh 5.1682 g of the black mixture after ball milling into a stainless steel reaction kettle lined with polytetrafluoroethylene, and add a certain amount of water, wherein Zn:Mn=0.95:2, pH=5. After sealing, put the reaction kettle into a homogeneous reactor, and the filling degree of the treated materials (black mixture, zinc skin, water) in the reaction kettle is 80vol%; react at 180°C for 1 day. After the reaction was completed, the reactor was taken out and cooled to room temperature. The resulting product is taken out, washed with deionized water, filtered and dried to obtain ZnMn 2 o 4 Powder, under 0.1C charge and discharge rate, the first discharge specific capacity is 551.5mAh / g.

Embodiment 2

[0036] Weigh 5.1682g and 0.0222g of the black mixture after ball milling into a stainless steel reaction kettle lined with polytetrafluoroethylene, add a certain amount of water, and adjust the pH to 7 with a certain amount of ammonia water, where Zn:Mn=1:2. After sealing, put the reaction kettle into a homogeneous reactor, and the filling degree of the treated materials (black mixture, zinc skin, water and ammonia water) in the reaction kettle is 80vol%; react at 190°C for 2 days. After the reaction was completed, the reactor was taken out and cooled to room temperature. The resulting product is taken out, washed with deionized water, filtered and dried to obtain ZnMn 2 o 4 Powder, under 0.1C charge and discharge rate, the first discharge specific capacity is 609.5mAh / g.

Embodiment 3

[0038] Weigh 5.1682g of the black mixture after ball milling and 0.0444g of the zinc skin into a stainless steel reaction kettle lined with polytetrafluoroethylene, add a certain amount of water, and adjust the pH to 9 with a certain amount of ammonia water, where Zn:Mn=1.034:2 . After sealing, put the reaction kettle into a homogeneous reactor, and the filling degree of the treated materials (black mixture, zinc skin, water and ammonia water) in the reaction kettle is 80vol%; react at 180°C for 3 days. After the reaction was completed, the reactor was taken out and cooled to room temperature. The resulting product is taken out, washed with deionized water, filtered and dried to obtain ZnMn 2 o 4 Powder, under 0.1C charge and discharge rate, the first discharge specific capacity is 689.5mAh / g.

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Abstract

The invention discloses a method for preparing negative electrode materials of lithium batteries from waste and old zinc-manganese batteries and belongs to the technical field of the resource recovery treatment of solid wastes. The method comprises the following steps that (1) the batteries are mechanically dismounted, carbon rods, metal caps, rolled tins, iron sheets and black mixtures are separated out; (2) the cleaned rolled tins are crushed and dried for standby, and the black mixtures are subjected to ball grinding and drying for standby; (3) the content of zinc and manganese elements in the mixture is measured by a chemical capacity method; (4) the rolled tins and the black mixtures in a certain proportion are placed in a reaction kettle, the pH is regulated to be 5 to 9 by ammonia water, the hydrothermal reaction is carried out for 1 to 3 days at the temperature being 180 DEG C to 220 DEG C, and the mixtures are taken out for cooling; and(5) products are subjected to washing, suction filtering and drying. The method has the advantages that the waste and old zinc-manganese batteries can be reutilized as the resources, the environment pollution is reduced, and high-additional-value negative electrode materials ZnMn2O4 of the lithium batteries are developed.

Description

technical field [0001] The invention belongs to the technical field of resource recovery and treatment of solid waste, and in particular relates to a method for preparing negative electrode materials of lithium batteries by using waste zinc-manganese batteries. Specifically, it is a lithium battery anode material ZnMn prepared by using waste zinc-manganese batteries as raw materials. 2 o 4 Methods. Background technique [0002] my country is a big producer and consumer of dry batteries, with an annual output of 15 billion, ranking first in the world, accounting for about 1 / 3 of the world's total, of which 70% are zinc-manganese dry batteries. Based on the annual production of 10 billion zinc-manganese dry batteries, the annual zinc and manganese consumption is equivalent to the annual zinc and manganese production of three or four large smelters. The random discarding of zinc-manganese dry batteries not only wastes precious metal resources, but also pollutes the environme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54H01M4/50
CPCY02E60/10Y02W30/84
Inventor 罗绍华徐彩虹张溪溪邓丽娜
Owner NORTHEASTERN UNIV
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