Preparation method of functional porous graphene integrated electrode material and application of functional porous graphene integrated electrode material in vanadium battery

A technology of porous graphene and electrode materials, applied in fuel cells, regenerative fuel cells, battery electrodes, etc., can solve the problems of limiting vanadium battery performance and poor electrochemical reaction activity, achieve excellent electrical conductivity, and increase interface binding force , the effect of high reactivity

Active Publication Date: 2020-08-14
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its electrochemical reactivity is poor, which severely limits the performance of vanadium batteries.

Method used

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  • Preparation method of functional porous graphene integrated electrode material and application of functional porous graphene integrated electrode material in vanadium battery
  • Preparation method of functional porous graphene integrated electrode material and application of functional porous graphene integrated electrode material in vanadium battery
  • Preparation method of functional porous graphene integrated electrode material and application of functional porous graphene integrated electrode material in vanadium battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1 Functional Porous Graphene Integrated Electrode Material

[0030] The preparation method comprises the following steps:

[0031] (1) Preparation of Porous Graphene / Flexible Graphite Plate Integrated Electrode Material

[0032] 1) Disperse graphene oxide in an aqueous solution, then add lithium perchlorate, mix well, and prepare a supporting electrolyte solution with a graphene oxide concentration of 5 mg / mL and a lithium perchlorate concentration of 0.15 mg / mL.

[0033] 2) The bipolar plate adopts a bipolar plate whose surface is graphite, and the surface conductivity is about 120S / cm.

[0034] 3) A bipolar plate (1cm×1cm) with a graphite surface was used as the working electrode, a saturated calomel electrode (SCE) connected with a saturated KCl salt bridge was used as the reference electrode, and a platinum sheet (2cm×2cm) was used as the auxiliary electrode. A three-electrode system uses an aqueous solution containing graphene oxide and lithium perchlorat...

Embodiment 2

[0041] Example 2 Functional Porous Graphene Integrated Electrode Material

[0042] The preparation method comprises the following steps:

[0043] (1) Preparation of Porous Graphene / Flexible Graphite Plate Integrated Electrode Material

[0044] 1) Disperse graphene oxide in an aqueous solution, then add lithium perchlorate, mix well, and prepare a supporting electrolyte solution with a graphene oxide concentration of 2 mg / mL and a lithium perchlorate concentration of 0.15 mg / mL.

[0045] 2) The bipolar plate adopts a bipolar plate whose surface is graphite, and the surface conductivity is about 120S / cm.

[0046] 3) A bipolar plate (1cm×1cm) with a graphite surface was used as the working electrode, a saturated calomel electrode (SCE) connected with a saturated KCl salt bridge was used as the reference electrode, and a platinum sheet (2cm×2cm) was used as the auxiliary electrode. A three-electrode system uses an aqueous solution containing graphene oxide and lithium perchlorat...

Embodiment 3

[0052] Example 3 Functional Porous Graphene Integrated Electrode Material

[0053] The preparation method comprises the following steps:

[0054] (1) Preparation of Porous Graphene / Flexible Graphite Plate Integrated Electrode Material

[0055] 1) Disperse graphene oxide in an aqueous solution, then add lithium perchlorate, mix well, and prepare a supporting electrolyte solution with a graphene oxide concentration of 8 mg / mL and a lithium perchlorate concentration of 0.15 mg / mL.

[0056] 2) The bipolar plate adopts a bipolar plate whose surface is graphite, and the surface conductivity is about 120S / cm.

[0057] 3) A bipolar plate (1cm×1cm) with a graphite surface was used as the working electrode, a saturated calomel electrode (SCE) connected with a saturated KCl salt bridge was used as the reference electrode, and a platinum sheet (2cm×2cm) was used as the auxiliary electrode. A three-electrode system uses an aqueous solution containing graphene oxide and lithium perchlorat...

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Abstract

The invention relates to a preparation method of a functional porous graphene integrated electrode material and application of the functional porous graphene integrated electrode material in a vanadium battery. The method comprises the following steps: taking a bipolar plate as a working electrode, adopting a three-electrode system, taking an aqueous solution containing graphene oxide and lithiumperchlorate as a supporting electrolyte, carrying out electrochemical deposition for the first time to obtain a porous graphene/bipolar plate integrated electrode material, and carrying out immersioncleaning with deionized water; and taking the immersed porous graphene/bipolar plate integrated electrode material as a working electrode, adopting a three-electrode system, taking a solution containing functional components as a secondary electro-deposition electrolyte solution, carrying out secondary electrochemical deposition, and introducing the functional components into the surface of the porous graphene to obtain the functional porous graphene integrated electrode material. When the electrode material is applied to a vanadium battery electrode, the polarization loss of a vanadium battery in the operation process can be effectively reduced, the battery storage capacity is increased, and the battery performance is improved. The method is easy and convenient to operate, flexible in design, high in controllability, environmentally friendly, free of pollution and good in application prospect.

Description

technical field [0001] The invention relates to the technical field of battery materials and energy storage, in particular to a preparation method of a functional porous graphene integrated electrode material and its application in a vanadium battery. Background technique [0002] With the rapid development of renewable clean energy such as solar energy, wind energy, and tidal energy, the supporting energy storage technology and its industrial development have also received more and more attention. As a large-scale energy storage device with great development prospects, all-vanadium redox flow battery has become one of the preferred technologies for electrochemical energy storage due to its advantages such as long cycle life, large energy storage capacity, safety, reliability, and environmental protection. [0003] However, the high cost of vanadium batteries is the core factor limiting its industrialization. Under the condition of certain redox active components, the most ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/96H01M8/18
CPCH01M4/8853H01M4/96H01M8/188Y02E60/50
Inventor 房大维井明华张春玲
Owner LIAONING UNIVERSITY
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