A photoelectrochemical flow energy storage battery using vanadium compounds as active materials

An active material, photoelectrochemical technology, applied in electrical components and other directions, can solve the problems of cross-contamination of electrolytes, expensive electrodes, and low battery discharge power.

Active Publication Date: 2018-05-15
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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  • A photoelectrochemical flow energy storage battery using vanadium compounds as active materials
  • A photoelectrochemical flow energy storage battery using vanadium compounds as active materials
  • A photoelectrochemical flow energy storage battery using vanadium compounds as active materials

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Experimental program
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Effect test

Embodiment 1

[0040] 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.

[0041] 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.

[0042] Add 10mL 0.05mol / 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 nafion 115 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...

Embodiment 2

[0044] TiO was produced by anodic oxidation 2 Photoanode; carbon felt as counter electrode. Add 10mL 0.04mol / 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 nafion 115 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 was used as the working electrode, the saturated calomel electrode was used as the reference electrode, and the carbon felt in the negative reaction chamber was 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 t...

Embodiment 3

[0046] Prepare TiO by anodic oxidation 2 Photoanode; with graphene oxide as the counter electrode.

[0047] Add 10mL 0.04mol / L VOSO to the positive and negative storage tanks 4 +0.08mol / L H 2 SO 4 Electrolyte, 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 2The photoanode was used as the working electrode, the saturated calomel electrode was used as the reference electrode, and the graphene oxide in the negative reaction ...

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Abstract

The invention provides a photoelectrochemical energy storage battery using a vanadium compound as an electroactive substance. When the battery is charged, photoelectrochemical reaction (Photoelectrochemical Reaction) is used to convert light energy into chemical energy and store it in the activity of the battery electrolyte. When the battery is discharged, an electrochemical reaction occurs to convert chemical energy into electrical energy. The invention couples the photoelectrochemical battery with the liquid flow battery, overcomes the inability of the solar battery to realize electric energy storage, realizes the in-situ conversion, storage and controllable utilization of solar energy, and has a simple system structure, low cost, and easy miniaturization; Scale-up, suitable for solar-energy storage-power generation processes of different scales.

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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Patent Type & Authority Patents(China)
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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