Method for recovery of elemental cobalt from lithium cobaltate by microbial fuel cell (MFC) self-driven microbial electrolysis cell (MEC) coupled system

A technology of microbial electrolysis cell and fuel cell, which is applied in the direction of fuel cell, battery recycling, waste collector recycling, etc., and can solve the problem of inputting large energy

Inactive Publication Date: 2013-08-28
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although MECs can leach LiCoO 2 And get elemental cobalt, but the system needs to input a lot of energy; moreover, the catholyte needs to be limited to a stronger acidic environment

Method used

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  • Method for recovery of elemental cobalt from lithium cobaltate by microbial fuel cell (MFC) self-driven microbial electrolysis cell (MEC) coupled system
  • Method for recovery of elemental cobalt from lithium cobaltate by microbial fuel cell (MFC) self-driven microbial electrolysis cell (MEC) coupled system
  • Method for recovery of elemental cobalt from lithium cobaltate by microbial fuel cell (MFC) self-driven microbial electrolysis cell (MEC) coupled system

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Embodiment 1

[0024] Step 1: Build MFCs and MECs, such as figure 1 Shown: MFCs anode compartment 2 and cathode compartment 5, MECs anode compartment 14 and cathode compartment 17 are made of plexiglass, the volume of the solution in the anode compartment of MFCs and MECs is 15 mL, the volume of solution in the cathode compartment of MFCs and MECs is 25 mL, Separated by an ion exchange membrane (CMI-7000) 4 or 16, a 10Ω small resistor 11 is connected in series between MFCs and MECs, so as to collect and calculate the current in the circuit.

[0025] Step 2: MFCs anode electrode (carbon rod and carbon felt) and cathode electrode (carbon rod and carbon felt) are placed in MFCs anode chamber 2 and cathode chamber 5 respectively, MECs anode electrode (carbon rod and carbon felt) and cathode Electrodes (carbon rods) are placed in the anode chamber 14 and cathode chamber 17 of the MECs. The apparent size of the carbon rod (Beijing Sanye Carbon Material Co., Ltd.) is 0.8cm×3.5cm, the carbon felt (...

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Abstract

The invention discloses a method for recovery of elemental cobalt from lithium cobaltate by a microbial fuel cell (MFC) self-driven microbial electrolysis cell (MEC) coupled system. The method is characterized in that an MFC anode is directly connected to an MEC cathode; an MFC cathode is connected to an MEC anode by a resistance; an MFC cathode chamber is filled with a cathode liquid and lithium cobaltate particles; an MFC anode chamber is inoculated with sludge as an electrochemical activity microbe source in a clarification pool of a sewage treatment plant, an MEC cathode chamber is filled with a Co(II)-containing aqueous solution; an MEC anode chamber is inoculated with the sludge as an electrochemical activity microbe source in a clarification pool of a sewage treatment plant; and anode and cathode materials are graphite materials. The method provides an effective approach for in-situ utilization of MFC output electric energy and provides a wide space for extra electric energy input-free and cathode liquid acidity limit-free MEC application.

Description

technical field [0001] The invention belongs to the technical field of microbial electrochemistry, and specifically utilizes the respective characteristics of microbial fuel cells MFCs and microbial electrolytic cells MECs to combine Co(III) leaching of lithium cobaltate particles into liquid phase Co(II), and from liquid phase Co( II) The chemical potential change of the reduction to elemental cobalt, which is driven by the leaching of Co(III) to Co(II) MFCs and coupled with the MECs process of Co(II) reduction to elemental cobalt. Background technique [0002] Both Microbial Fuel Cells (MFCs) and Microbial Electrolysis Cells (MECs) include an anode chamber, an anode electrode, a cathode chamber, a cathode electrode, and a proton exchange membrane. The difference is that the Gibbs free energy of the reaction between the cathode and anode of MFCs is less than zero, the reaction can proceed spontaneously, and the system outputs electric energy; on the contrary, the Gibbs free...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C1/08C25C7/00H01M10/54H01M8/06H01M8/0662
CPCY02E60/50Y02W30/84
Inventor 黄丽萍姚丙林全燮
Owner DALIAN UNIV OF TECH
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