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Photo-electrochemical redox flow energy storage battery with vanadium compound as active substance

An active material, photoelectrochemical technology, applied in electrical components and other directions, can solve the problems of cross-contamination of electrolytes, limited storage capacity of batteries, and low stability of photoelectrodes.

Active Publication Date: 2015-09-16
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problems to be solved by the present invention are: low stability of the photoelectrode in the current photoelectrochemical energy storage battery, limited storage capacity of the battery, high cost of the counter electrode, easy cross-contamination of the electrolyte, low discharge power of the battery, To solve the problems of limited battery life, develop a photoelectrochemical energy storage battery with high stability, low cross-contamination, low cost, high storage capacity, and long life

Method used

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  • Photo-electrochemical redox flow energy storage battery with vanadium compound as active substance
  • Photo-electrochemical redox flow energy storage battery with vanadium compound as active substance
  • Photo-electrochemical redox flow energy storage battery with vanadium compound as active substance

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Experimental program
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Effect test

Embodiment 1

[0042] Using FTO as a conductive substrate, WO was prepared by hydrothermal method 3 Photoanode: use graphite plate as current collector, mix carbon nanotubes, acetylene black and PVDF to prepare carbon nanotube counter electrode.

[0043] Weigh an appropriate amount of vanadyl sulfate and dissolve it in sulfuric acid solution to prepare the electrolyte of the battery, wherein VOSO 4 The concentration of sulfuric acid is 0.05mol / L, and the concentration of sulfuric acid is 0.1mol / L.

[0044] Add 10mL0.05mol / L VOSO to the positive and negative reaction chambers 4 +0.1mol / L H 2 SO 4 Electrolyte, the positive and negative electrolytes are separated by nafion115 membrane; the photoanode and saturated calomel electrode are placed in the electrolyte of the positive reaction chamber, and the carbon nanotube counter electrode is placed in the electrolyte of the negative reaction chamber. With the photoanode in the positive reaction chamber as the working electrode, the saturated c...

Embodiment 2

[0046] TiO was produced by anodic oxidation 2 Photoanode; carbon felt as counter electrode. Add 10mL0.04mol / L VOSO to the positive and negative reaction chambers 4 +0.08mol / L H 2 SO 4 Electrolyte, the positive and negative electrolytes are separated by nafion115 membrane; the photoanode, carbon felt counter electrode and saturated calomel electrode are placed in the electrolyte of the positive reaction chamber, and the other carbon felt counter electrode is placed in the negative reaction chamber in the electrolyte. with TiO 2 The photoanode is used as the working electrode, the saturated calomel electrode is used as the reference electrode, and the carbon felt in the negative reaction chamber is used as the counter electrode. 2 The light intensity is used to illuminate, and the battery is charged at a constant potential of 0.4V (vs. SCE), and the charging time is 1h. In the dark state, the carbon felt in the positive and negative reaction chambers is connected to the op...

Embodiment 3

[0048] Prepare TiO by anodic oxidation 2 Photoanode; with graphene oxide as the counter electrode.

[0049] Add 10mL0.04mol / L VOSO to the positive and negative storage tanks 4 +0.08mol / L H 2 SO 4Electrolyte, the positive and negative chambers of the battery are respectively connected to the external positive and negative electrolyte storage tanks through pipelines, and the mechanical pump drives the electrolyte to circulate between the battery chamber and the storage tank to form a photoelectrochemical liquid flow energy storage Battery. The photoanode, the graphene oxide counter electrode and the saturated calomel electrode are placed in the electrolyte in the positive reaction chamber, and the other graphene oxide counter electrode is placed in the electrolyte in the negative reaction chamber. with TiO 2 The photoanode is used as the working electrode, the saturated calomel electrode is used as the reference electrode, and the graphene oxide in the negative reaction cha...

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Abstract

The invention provides a photoelectrochemical redox flow energy storage battery with a vanadium compound as an active substance. When the battery is being charged, luminous energy is converted to chemical energy by a photoelectrochemical reaction, and the chemical energy is stored in an active substance of a battery electrolyte. When the battery is being discharged, an electrochemical reaction is performed so as to convert chemical energy to electric energy. By coupling a photoelectrochemical battery with a flow battery, the insufficiency that a solar battery cannot realize electrical energy storage is overcome, and in situ conversion, storage and controllable use of a solar battery are realized. The system has a simple structure, is low-cost and is easy for miniaturization. Large-scale amplification can be realized. The battery provided by the invention is suitable for the solar energy-energy storage-power generation process of different sizes.

Description

technical field [0001] The invention relates to a photoelectrochemical energy storage battery with a vanadium compound as an active material, more specifically, a photoelectrochemical energy storage battery that couples a photoelectrochemical battery with a flow battery, and belongs to the field of photoelectrochemical battery and liquid flow battery. The intersection of batteries. Background technique [0002] The depletion of fossil energy and environmental pollution are two major problems facing the development of human society. In order to solve the above problems, on the one hand, it is necessary to save energy, reduce emissions, and improve energy utilization; on the other hand, it is necessary to develop and utilize renewable energy. But the former can only treat the symptoms, while the latter fundamentally solves the problems of energy crisis and environmental pollution. The renewable energy that has been developed at this stage mainly includes solar energy, wind e...

Claims

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Application Information

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IPC IPC(8): H01M14/00
Inventor 李灿陈剑廖世潮施晶莹
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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