Application of MXene membrane in reverse electrodialysis power generation

A reverse electrodialysis and electrode technology, which is applied in the application field of MXene membrane in reverse electrodialysis power generation, can solve the problems of large film thickness and output power influence, and achieve long working life, stable potential and good reproducibility Effect

Active Publication Date: 2019-05-24
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The thickness of the membrane has an important impact on the membrane resistance and the ion selectivity of the membrane. The above-mentioned commonly used commercial membranes are applied to reverse electrodialysis power generation, and the membrane thickness is large, which will affect the output power.

Method used

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  • Application of MXene membrane in reverse electrodialysis power generation
  • Application of MXene membrane in reverse electrodialysis power generation
  • Application of MXene membrane in reverse electrodialysis power generation

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Experimental program
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Effect test

Embodiment 1

[0045] figure 2 It is a schematic diagram of the application of MXene membrane in reverse electrodialysis power generation. The device is mainly composed of electrode 1, two-dimensional layered MXene membrane 2, concentrated salt solution 3, and dilute salt solution 4. The saline solution is sodium chloride solution.

[0046] The ion-exchange MXene membrane in this device is Ti 3 C 2 T x The MXene film has a thickness of 5 μm, a layer spacing of 0.26 nm, and a single layer thickness of 1.5 nm, such as figure 1 As shown; the electrode is a silver / silver chloride electrode with a thickness of 200 μm; the molar concentration ratio of concentrated sodium chloride solution 3 and dilute sodium chloride solution 4 is 50:1, and the concentration of concentrated sodium chloride solution is 0.5mol / L , the pH is 5.85, the concentration of the dilute sodium chloride solution is 0.01mol / L, and the pH is 6.34.

[0047] Power generation process: the two-dimensional layered MXene membr...

Embodiment 2

[0050] Generating device and generating process are exactly the same as embodiment 1, just changed the following parameters in the generating device:

[0051] The ion-exchange MXene membrane in this device is Ti 3 C 2 T x MXene film, its thickness is 20 μm, the distance between MXene film layers is 0.3nm, and the thickness of single layer is 1.5nm; the electrode is a sheet-like silver / silver chloride electrode with a thickness of 400μm; concentrated sodium chloride solution and dilute sodium chloride solution The molar concentration ratio is 10:1, the concentration of the concentrated potassium chloride solution is 1mol / L, and the pH is 10.79, the concentration of the dilute potassium chloride solution is 0.1mol / L, and the pH is 3.77.

[0052] The results show that when the external resistance is 1000Ω, the output power of the power generation device is 0.65W / m 2 .

Embodiment 3

[0054] Generating device and generating process are exactly the same as embodiment 1, just changed the following parameters in the generating device:

[0055] The ion-exchange MXene membrane in this device is Ti 3 C 2 T x MXene film with a thickness of 30 μm, MXene film interlayer spacing of 0.35 nm, and a single layer thickness of 1.5 nm; the electrode is a sheet-shaped silver / silver chloride electrode with a thickness of 600 μm; concentrated sodium chloride solution and dilute sodium chloride solution The molar concentration ratio is 5:1, the concentration of concentrated sodium chloride solution is 0.5mol / L, the pH is 3.3, the concentration of dilute sodium chloride solution is 0.01mol / L, and the pH is 11.2.

[0056] The results show that when the external resistance is 3000Ω, the output power of the power generation device is 0.25W / m 2 , and the current remains stable within 3600s, such as Figure 4 shown.

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Abstract

The invention provides an application of an MXene membrane in reverse electrodialysis power generation, and the MXene membrane has a two-dimensional layered structure, wherein the thickness of the MXene membrane is 1-30 microns, and the single-layer spacing is 0.1-0.5nm. When the MXene membrane is applied in reverse electrodialysis power generation, a power generation system with higher membrane conductivity, stronger ion conductivity, larger ion exchange capacity, lower membrane resistance and stronger ion selectivity can be obtained, so that higher power generation efficiency is provided, and the maintenance time is long. Moreover, the MXene membrane is applied in the reverse electrodialysis power generation process, so the concentration and pH range of the concentrated salt solution andthe dilute salt solution can be expanded, high power generation efficiency can be ensured in the environments with small concentration difference, acidity and alkalinity, and the MXene membrane has agood application prospect in the field of reverse electrodialysis.

Description

technical field [0001] The invention relates to the technical field of utilizing power generation. More specifically, it relates to the application of an MXene membrane in reverse electrodialysis power generation. Background technique [0002] With the rapid development of human society, people's demand for energy is increasing day by day. Since the second industrial revolution, electricity has become a high-value and easy-to-use energy source. The current power generation methods include thermal power generation, hydropower generation and the utilization of new energy. However, thermal power generation utilizes non-renewable fossil fuels and causes serious environmental pollution problems. The construction of hydropower stations will change the hydrological environment and affect the survival of aquatic organisms. The utilization of new energy (such as wind energy, geothermal energy, nuclear energy, solar energy, etc.) still has certain technical obstacles and cannot be...

Claims

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Application Information

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IPC IPC(8): H01M8/22
CPCY02E60/50
Inventor 闻利平刘佩孙悦孔祥玉江雷
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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