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biomimetic electrochemical cell

An electrochemical and electrode technology, applied in the direction of biochemical fuel cells, electrochemical generators, fuel cells, etc., can solve the problems of relatively few studies on the forced transfer process of electrochemical cells, reduce the probability of side reactions, and enhance diffusion , the effect of preventing consumption

Inactive Publication Date: 2017-03-01
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

has been extensively studied, but relatively little is known about the forced transport of species in electrochemical cells

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Embodiment 1. The electrochemical reaction process that does not consume gas and liquid reactant

[0058] The design of a biomimetic electrochemical cell for such a process is illustrated using the electrolytic refining of copper as an example. First, the electrolytic copper reacts as follows:

[0059] Blister copper anode: Cu=Cu 2+ +2e

[0060] Refined copper cathode: Cu 2+ +2e=Cu

[0061] Total reaction: Cu (粗) =Cu (纯)

[0062] Its electrolyte is CuSO 4 and H 2 SO 4 of the mixture. Therefore, the electrolyte enters from one end of the cathode, where copper ions obtain electrons and deposit on the refined copper cathode, and the excess SO 4 2- Under the control of the deflector, it is entrained by the electrolyte and flows from the pipeline array to the anode of the thick copper plate without back mixing, where SO 4 2- Cu produced by anodic oxidation 2+ Combine and leave the anode area. Because the anode dissolution process of blister copper will cause ...

Embodiment 2

[0064] Example 2. Electrochemical Reaction Process Consuming Gas or Liquid Reactants on Only One Electrode

[0065] With sacrificial zinc anode CO 2 The electrochemical reduction reaction is illustrated as an example. The reaction consumes the gaseous reactant CO 2 The electrochemical reaction:

[0066] CO 2 Cathode: 2CO 2 +2e=C 2 o 4 2-

[0067] Zinc anode: Zn+C 2 o 4 2- =ZnC 2 o 4 +2e

[0068] Total reaction: Zn+2CO 2 =ZnC 2 o 4

[0069] Its electrolyte is anhydrous tetrabutylammonium perchlorate in acetonitrile. Therefore, CO 2 It enters from one side of the porous cathode, and the electrolyte enters from the other side of the porous cathode, and the C produced by the reaction 2 o 4 2- Brought into the anode area through the pipeline array; then, the C containing C 2 o 4 2- The electrolyte reacts directly with the metal zinc, and then the ZnC produced 2 o 4 into the solid-liquid separator. ZnC 2 o 4 The clean electrolyte obtained after separati...

Embodiment 3

[0071] Example 3. Electrochemical reaction process for gas generation on one or both electrodes

[0072] Take the charging process of a rechargeable zinc-air battery as an example. The process reacts as follows:

[0073] Anode: 2OH - =1 / 2O 2 +H 2 O+2e

[0074] Cathode: ZnO+H 2O+2e=Zn+2OH -

[0075] Total reaction: ZnO=Zn+1 / 2O 2

[0076] Its electrolyte is KOH solution. Therefore, the electrolyte enters from one side of the porous anode, and then carries the oxygen formed to the gas-liquid separator, where the oxygen escapes from the reaction system. After that, the electrolyte enters the cathode area, contacts and reacts with zinc oxide to deposit zinc on the electrode, and then the generated OH - out of the reaction system. If there is solid ZnO taken away by the electrolyte, solid-liquid separation can be done afterwards, otherwise the electrolyte can be directly pumped into the anode for recycling ( Figure 6 ).

[0077] For the electrochemical reaction in whi...

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Abstract

The invention discloses a bionic electrochemical cell. The bionic electrochemical cell comprises two chambers, an anode, a cathode, a flow guide plate, and a pump for pushing electrolyte to flow directionally, wherein electrochemical reaction is generated in the chambers; the anode and the cathode are counter electrodes and are arranged in the two chambers. According to the requirement, each chamber also can be connected with a separator capable of separating products or impurities, and the two chambers are separated away by the flow guide plate which is composed of a flow limiting plate and a pipeline array. The bionic electrochemical cell has the functions that the electrolyte on the surface of an electrode can directionally flow from one electrode zone to the counter electrode zone without backmixing at the equal or similar speed under the pushing by the pump and the restriction of the flow guide plate, and finally flows out from an outlet. The bionic electrochemical cell has the beneficial effects the mass transfer process of substances between electrodes can be accelerated, so that the electrochemical reaction speed can be increased; reactants can be added at proper places, and the products also can be separated timely, so that the interference to the reaction by the products or the consumption of the electrodes can be inhibited, and the probability of side reaction can be reduced greatly.

Description

technical field [0001] The invention relates to an electrochemical reactor, in particular to a bionic electrochemical cell, which belongs to the field of chemical reactors. Background technique [0002] An electrochemical cell is the place where electrochemical reactions take place and has at least four key components or components: a power source or consumer, an anode, a cathode, and an electrolyte, all housed together in a container. When the first component above is a power source, it is called an electrolytic cell; if it is an electrical appliance, it is called a battery. Therefore, electrochemical cells can be used to generate electricity, and electrical energy can also be used to decompose existing substances to produce new substances. [0003] When the electrochemical cell is working, an electrochemical reaction is divided into two halves: the oxidation half reaction and the reduction half reaction. Among them, the oxidation half-reaction is carried out on the anode...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/16H01M8/02H01M8/0258
CPCY02E60/50
Inventor 雷立旭张瑞李光华
Owner SOUTHEAST UNIV
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