A low temperature resistant flexible thermoelectric material, thermal battery and preparation method thereof

A low-temperature flexible, thermoelectric material technology, applied in secondary batteries, circuits, electrothermal devices, etc., can solve problems such as hindering redox electrothermal migration, affecting thermoelectric conversion efficiency, and limiting the application of thermal batteries, so as to facilitate mass production and improve Freeze resistance and low production cost

Active Publication Date: 2022-02-11
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the matrix of thermal batteries will inevitably freeze and lose entropy elasticity below 0 °C, hindering the thermal migration of redox couples, which will seriously affect the thermoelectric conversion efficiency, so that it can only achieve relatively high energy efficiency at around room temperature. High thermoelectric conversion efficiency severely limits the application of thermal batteries in extreme environments such as plateaus, polar regions, and space exploration

Method used

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  • A low temperature resistant flexible thermoelectric material, thermal battery and preparation method thereof
  • A low temperature resistant flexible thermoelectric material, thermal battery and preparation method thereof
  • A low temperature resistant flexible thermoelectric material, thermal battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Take 4 wt% of acryloyloxyethyltrimethylammonium chloride monomer and 20 wt% of acrylamide monomer, the total mass of monomers 1 wt% polyethylene glycol acrylic acid crosslinking agent and the total mass of monomers 0.2 The mol% ammonium persulfate initiator was dissolved in deionized water to obtain a precursor solution. The precursor solution was poured into shaped molds of different shapes, degassed and sealed, and reacted in a steady state at 60 °C for 12 h to complete the polymerization to obtain flexible stretchable matrices of different sizes (rectangular, square, circular, fibrous). Soak the prepared flexible stretchable matrix in a mixture of 0.18 M ferric chloride / 0.18 M ferric chloride / 50% ethylene glycol / 50% water for solvent exchange, and prepare flexible thermoelectric materials resistant to low temperature, such as figure 2 shown. The Seebeck coefficient of low temperature resistant flexible thermoelectric materials is as follows image 3 shown, for 2 mV ...

Embodiment 2

[0051] Take 4 wt% of acryloyloxyethyltrimethylammonium chloride monomer and 20 wt% of acrylamide monomer, the total mass of monomers 1 wt% polyethylene glycol acrylic acid crosslinking agent and the total mass of monomers 0.2 The mol% ammonium persulfate initiator was dissolved in deionized water to obtain a precursor solution. The precursor solution was poured into shaped molds of different shapes, degassed and sealed, and reacted in a steady state at 60 °C for 12 h to complete the polymerization to obtain thermal battery substrates of different sizes (rectangular, square, circular, fibrous). The prepared thermal battery substrate was soaked in a mixture of 0.3 M potassium ferricyanide / 0.3 M potassium ferrocyanide / 66 % glycerol / 33 % water for solvent exchange, and a low temperature resistant flexible organic oil gel was prepared. A low-temperature resistant flexible thermal battery was prepared by integrating copper electrodes at both ends of the organic oil gel. Its Seebeck...

Embodiment 3

[0054] Take 3 wt% of acryloyloxyethyltrimethylammonium chloride monomer and 20 wt% of acrylamide monomer, the total mass of monomers 1 wt% polyethylene glycol acrylic acid crosslinking agent and the total mass of monomers 0.2 The mol% ammonium persulfate initiator was dissolved in deionized water to obtain a precursor solution. The precursor solution was poured into shaped molds of different shapes, degassed and sealed, and reacted in a steady state at 60 °C for 12 h to complete the polymerization to obtain thermal battery substrates of different sizes (rectangular, square, circular, fibrous). The prepared thermal battery substrate was soaked in a mixture of 0.5 M ferric chloride / 0.5 M ferrous chloride / 66 % ethylene glycol / 33% water for solvent exchange, and a low temperature resistant flexible organic oil gel was prepared. A low-temperature resistant flexible thermal battery was prepared by integrating copper electrodes at both ends of the organic oil gel. Its Seebeck coeffi...

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Abstract

The invention discloses a low-temperature-resistant flexible thermoelectric material, a thermal battery and a preparation method thereof, wherein the low-temperature-resistant flexible thermoelectric material is obtained by introducing a polyol after cross-linking a flexible stretchable matrix with a redox couple; The stretched matrix is ​​obtained by copolymerizing polyelectrolyte monomers and water-soluble monomers. The redox pair forms a mixture with polyol and water, and the flexible stretchable matrix is ​​soaked in the mixture for solvent exchange to obtain the flexible thermoelectric material. The invention has the advantages of convenient manufacture, short production cycle, low production cost, easy batch production, high thermal battery performance, good mechanical properties, and excellent low temperature resistance performance. Applications in extremely low temperature environments such as space offer broad prospects.

Description

technical field [0001] The invention relates to a thermoelectric material and a thermoelectric battery made of the thermoelectric material, in particular to a thermoelectric battery designed to solve the problem of utilizing low-grade heat energy in an extremely low temperature environment, which has the characteristics of low temperature resistance, flexibility and stretchability, and can be directly A thermoelectric material for converting low-grade thermal energy into electrical energy, a thermal battery, and a preparation method thereof. Background technique [0002] The rapid development of flexible electronic technology has established direct information transmission between human and external systems, expanded the interactive application scenarios of human work and life, and triggered a revolution in the modern electronics industry. Typical flexible electronic devices such as electronic skin, bio-information sensors, soft robots, and folding screens have been graduall...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M6/36C08J3/075H01M10/0565
CPCH05B3/146H01M6/36C08F220/56C08F220/34C08F222/1063
Inventor 陈永平高崴雷周玥
Owner SOUTHEAST UNIV
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