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Method for recovering valuable metal in waste lithium cobalt oxide battery anode material with citric acid and sodium thiosulfate

A sodium thiosulfate and battery positive electrode technology, applied in chemical instruments and methods, battery recycling, non-metallic elements, etc., can solve the problems of environmental pollution, waste of resources, etc., and achieve the effect of high purity, low cost and simple process

Inactive Publication Date: 2017-12-15
SHANGHAI SECOND POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above-mentioned problems of polluting the environment and wasting resources existing in reclaiming valuable metals from waste lithium cobalt oxide batteries, the purpose of the invention is to propose a positive electrode material in leaching waste lithium cobalt oxide batteries with citric acid and sodium thiosulfate Methods of recovering valuable metals

Method used

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  • Method for recovering valuable metal in waste lithium cobalt oxide battery anode material with citric acid and sodium thiosulfate
  • Method for recovering valuable metal in waste lithium cobalt oxide battery anode material with citric acid and sodium thiosulfate
  • Method for recovering valuable metal in waste lithium cobalt oxide battery anode material with citric acid and sodium thiosulfate

Examples

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Embodiment 1

[0021] This example uses citric acid and Na 2 S 2 O 3 The method for leaching the cathode material of the waste lithium cobalt oxide battery includes the following steps:

[0022] (1) After disassembling the waste lithium cobalt oxide battery, place the positive electrode material in a muffle furnace, and treat it at 500℃ for 30min in an air atmosphere to separate the aluminum foil and the active coating, and put the active coating at 600℃ Process for 7 hours to obtain relatively pure lithium cobalt oxide powder;

[0023] (2) The obtained relatively pure lithium cobalt oxide powder is leached with a mixture of 1M citric acid and 0.35M sodium thiosulfate, and the lithium cobaltate powder is mixed with the mixture of citric acid and sodium thiosulfate. The solid-liquid ratio is 25g / L, the leaching temperature is 90°C, and the leaching time is 40min;

[0024] (3) After filtering the impurities in the leaching solution, the content of leached ions in the filtrate is measured by ICP, and...

Embodiment 2

[0027] This example uses citric acid and Na 2 S 2 O 3 The method for leaching the cathode material of the waste lithium cobalt oxide battery includes the following steps:

[0028] (1) After disassembling the waste lithium cobalt oxide battery, place the positive electrode material in a muffle furnace, and treat it at 500℃ for 30min in an air atmosphere to separate the aluminum foil and the active coating, and put the active coating at 600℃ Process for 7 hours to obtain relatively pure lithium cobalt oxide powder;

[0029] (2) The obtained relatively pure lithium cobalt oxide powder is leached with a mixture of 1M citric acid and 0.3M sodium thiosulfate, and the lithium cobaltate powder is mixed with the mixture of citric acid and sodium thiosulfate. The solid-liquid ratio is 20g / L, the leaching temperature is 70°C, and the leaching time is 40min;

[0030] (3) After filtering the impurities in the leaching solution, the content of leached ions in the filtrate is measured by ICP, and ...

Embodiment 3

[0033] This example uses citric acid and Na 2 S 2 O 3 The method for leaching the cathode material of the waste lithium cobalt oxide battery includes the following steps:

[0034] (1) After disassembling the waste lithium cobalt oxide battery, place the positive electrode material in a muffle furnace and treat at 500℃ for 30min in air to separate the aluminum foil and the active coating, and put the active coating at 700℃ Process for 8h to obtain relatively pure lithium cobalt oxide powder;

[0035] (2) Leach the obtained relatively pure lithium cobalt oxide powder with a mixture of 1.4M citric acid and 0.4M sodium thiosulfate, the lithium cobaltate powder and the mixture of citric acid and sodium thiosulfate The solid-to-liquid ratio is 15g / L, the leaching temperature is 80℃, and the leaching time is 30min;

[0036] (3) Wash and dry the light yellow solid obtained by filtering the leachate, and measure XRD (see figure 2 ), the analysis shows that the product is elemental sulfur, ...

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Abstract

The invention belongs to the technical field of waste lithium ion battery recovering, and particularly relates to a method for recovering valuable metal in a waste lithium cobalt oxide battery anode material with citric acid and sodium thiosulfate. According to the method, the anode material is subject to heat treatment two times to obtain relatively pure lithium cobalt oxide powder and complete aluminum foil; and then cobalt and lithium ions are leached out through citric acid and sodium thiosulfate solutions, and a by-product, namely sulphur is produced. By means of the recovering method, the problems of environment pollution and resource waste in the technology for recovering the valuable metal from waste lithium cobalt oxide batteries can be solved. The method is simple in process, low in cost, high in recovery rate and high in recovered product purity.

Description

Technical field [0001] The invention belongs to the technical field of waste lithium ion battery recovery, and in particular relates to a method for recovering valuable metals in anode materials of waste lithium cobalt oxide batteries by using citric acid and sodium thiosulfate. Background technique [0002] Lithium-ion battery is a new type of battery that has appeared since the 1990s. It has the characteristics of large capacity, high energy density, no memory, and low self-discharge. It is used in portable electronic devices such as mobile phones, notebook computers and cameras, as well as automobiles, aerospace and It is widely used in medical and other equipment. Its development is extremely rapid, its manufacturing costs continue to decrease, its application areas continue to expand, and its consumption continues to increase. It produces hundreds of millions of lithium-ion batteries every year. At present, my country has grown into a major lithium-ion battery production, co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B26/12C22B23/00C22B7/00H01M10/54C01B17/02
CPCC01B17/0253C22B7/007C22B23/0415C22B26/12H01M10/54Y02P10/20Y02W30/84
Inventor 高桂兰贺欣关杰许昕郭耀广袁昊肖海阳罗兴民范丹丹朱秋杰李亚光
Owner SHANGHAI SECOND POLYTECHNIC UNIVERSITY