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Method for recovering elementary-substance cobalt from lithium cobaltate in one step by utilizing microbial electrolysis cell

A technology of microbial electrolytic cell and lithium cobaltate, which is applied to the improvement of process efficiency, photographic process, instruments, etc., can solve the problems of high energy consumption and cost, cumbersome process, and many by-products, and achieve a clean and pollution-free process. The effect of environmental pollution treatment and resource utilization effect

Inactive Publication Date: 2012-08-29
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Cobalt is used as lithium cobalt oxide (LiCoO 2 ) exists, the current recovery methods mainly include physical, chemical, biological and other processes to leaching it from the solid phase to the liquid phase, and the subsequent "two-step" or "multi-step" extraction from the liquid phase to the solid phase process, has the disadvantages of high energy consumption and cost, secondary pollution, many by-products, long cycle, low efficiency, cumbersome process, etc.

Method used

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  • Method for recovering elementary-substance cobalt from lithium cobaltate in one step by utilizing microbial electrolysis cell
  • Method for recovering elementary-substance cobalt from lithium cobaltate in one step by utilizing microbial electrolysis cell
  • Method for recovering elementary-substance cobalt from lithium cobaltate in one step by utilizing microbial electrolysis cell

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Embodiment 1

[0022] Step 1: Build a microbial electrolysis cell, such as figure 1 Shown: the anode chamber 1 and the cathode chamber 4 are made of plexiglass, with a total volume of 125 mL, respectively, and are separated by a proton permeable membrane (CMI-7000) 6.

[0023] Step 2: place anode electrode 2 and cathode electrode 5 in anode chamber 1 and cathode chamber 4 respectively, and the electrode materials of anode electrode 2 and cathode electrode 5 are graphite felt (Beijing Sanye Carbon Materials Company) (apparent size: 3 cm × 2 cm × 1 cm), connect 15 Ω external resistance and reference electrode 3 in the external circuit lead, and apply 0.2 V voltage; collect the change process of system current with time through the computer data acquisition system.

[0024] Step 3: Place 5 mg of lithium cobalt oxide powder (particle size 8-9 μm) and cathode electrode 5 in 100 mL of deionized water, stir magnetically at 100 rpm for 20 min, and the lithium cobalt oxide particles are completely ad...

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Abstract

The invention relates to a method for recovering elementary-substance cobalt from lithium cobaltate in one step by utilizing a microbial electrolysis cell. The method comprises the following steps of: connecting a resistor between the anode and the cathode of the microbial electrolysis cell, and applying voltage; filling electrochemical active microorganisms and anode liquor in an anode chamber of the microbial electrolysis cell; filling cathode liquor and lithium cobaltate particles in a cathode chamber of the microbial electrolysis cell; and inoculating the anode chamber by the clarifier sludge of a sewage treatment plant, wherein the clarifier sludge is used as the electrochemical active microorganisms, the cathode liquor is an inorganic acid solution, and a cathode electrode and an anode electrode are respectively made of a graphite material. The method for recovering the elementary-substance cobalt from the lithium cobaltate in one step by utilizing the microbial electrolysis cell is clean and efficient in process, is simple, is low in cost and is very good in application prospect of treating waste lithium ion batteries and recovering cobalt metal in the waste lithium ion batteries.

Description

technical field [0001] The invention belongs to the technical field of microbial electrochemistry, in particular to a method for recovering elemental cobalt from lithium cobaltate in one step by utilizing a microbial electrolytic cell. Background technique [0002] Microbial Electrolysis Cells (MECs) are composed of a power source, an anode chamber, an anode electrode, a cathode chamber, a cathode electrode, a proton exchange membrane, and an external circuit. Different from the microbial fuel cell, the Gipps free energy of the reaction between the cathode and the anode of the microbial electrolysis cell is greater than zero, which cannot occur naturally, and requires input of a certain voltage or energy to carry out the reaction. Using the protons and electrons in the cathode chamber of the microbial electrolysis cell, valuable chemicals can be synthesized. Therefore, it has the dual functions of anode organic pollutant treatment and cathode valuable chemical synthesis. It ...

Claims

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Application Information

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IPC IPC(8): C25C1/08
CPCY02P10/20
Inventor 黄丽萍郭瑞全燮刘雅旋蒋琳婕孙宇良陈国华
Owner DALIAN UNIV OF TECH
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