Zinc-polymer aqueous rechargeable battery with three-chamber structure and preparation method thereof

A technology of rechargeable batteries and polymers, which is applied in the field of zinc-polymer water-based rechargeable batteries and its preparation, can solve the problems of limited application potential, easy volatilization of organic solvents, and increased internal resistance of batteries, and achieve low cost and solution Non-volatile, freezing point lowering effect

Active Publication Date: 2021-08-06
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the polymer discharge platform is generally lower than 1.2 V, which limits its application potential, so how to improve its voltage platform is also an urgent problem to be solved
[0003] Aqueous electrolytes have the characteristics of high safety, low cost, and high ionic conductivity, but their freezing point is not low enough to cause devices to fail in severe winter conditions
At present, the research on low-temperature-resistant water-based electrolytes is mainly focused on the introduction of organic co-solvents, such as methanol, ethylene glycol, glycerol, etc., but organic solvents are volatile and have certain toxicity, and their viscosity increases at low temperatures, causing battery Internal resistance increases, these problems restrict its large-scale application

Method used

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  • Zinc-polymer aqueous rechargeable battery with three-chamber structure and preparation method thereof
  • Zinc-polymer aqueous rechargeable battery with three-chamber structure and preparation method thereof
  • Zinc-polymer aqueous rechargeable battery with three-chamber structure and preparation method thereof

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preparation example Construction

[0051] A preparation method of a zinc-polymer aqueous rechargeable battery with a three-chamber structure, comprising the following steps:

[0052] S1: Preparation of polymer positive electrode:

[0053] S1-1: Activate the conductive carbon fiber cloth in 2 M nitric acid solution, then wash it with deionized water until neutral, dry it at 60°C and use it as a current collector;

[0054] S1-2: Disperse porous activated carbon with high specific surface area, conductive carbon black, and polyvinylidene fluoride in N-methylpyrrolidone according to the mass ratio of 7:2:1, stir, and mix uniformly to obtain a carbon powder slurry;

[0055] S1-3: Apply the carbon powder slurry obtained in step S1-2 evenly on the carbon fiber cloth treated in step S1-1, then place it in a vacuum oven at 120°C, and dry it for 12 hours to obtain an activated carbon substrate;

[0056] S1-4: Dissolve any one of 1,4-benzoquinone, 2,3-dichloro-5,6-dicyano-p-benzoquinone, and 2,5-dihydroxy-1,4-benzoquinon...

Embodiment 1

[0069] S1: Preparation of poly-p-benzoquinone positive electrode:

[0070] S1-1: Put the highly conductive carbon fiber cloth into 2 M dilute nitric acid for 4 hours of activation treatment, then wash it repeatedly with deionized water until it becomes neutral, and dry it in a vacuum oven at 60°C for 12 hours before use .

[0071] S1-2: High specific surface area porous activated carbon powder (2230 g / cm 2 ), conductive carbon black, and polyvinylidene fluoride were dispersed in the N-methylpyrrolidone solution according to the mass ratio of 7:2:1, and then magnetically stirred until a uniformly mixed carbon powder slurry was obtained.

[0072] S1-3: Coat the carbon powder slurry evenly on the activated carbon cloth in step S1-1, and adjust the carbon powder loading range from 2 to 11 mg / cm by controlling the coating amount of the slurry 2 , and then dried in a vacuum oven at 120°C for 12 hours to obtain an activated carbon substrate; the substrate load can be adjusted by th...

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Abstract

The invention discloses a high-voltage, low-temperature-resistant and three-chamber structured zinc-polymer aqueous rechargeable battery and a preparation method thereof. The high-voltage, low-temperature-resistant and three-chamber structured zinc-polymer aqueous rechargeable battery comprises a positive electrode, a negative electrode, a cation diaphragm, an anion diaphragm, a positive electrode electrolyte, a negative electrode electrolyte and an intermediate transition electrolyte, the positive electrode is prepared by polymerizing small organic molecules through cyclic voltammetry and depositing the small organic molecules on a porous activated carbon substrate, high specific capacitance is given to the device by redox reaction between a polymer and electrolyte ions, and the positive electrode and the negative electrode are placed in different reaction environments through the cation diaphragm and the anion diaphragm respectively, so that oxygen evolution and hydrogen evolution reactions are effectively inhibited; the working voltage of the battery reaches 2.5 V, and a discharge platform is between 1.7 V and 1.9 V, depending on the selection of the polymer and the electrolyte.

Description

technical field [0001] The invention belongs to the technical field of electrochemical energy storage devices and secondary batteries, and in particular relates to a zinc-polymer water-based rechargeable battery with a three-chamber structure and a wide voltage window and a preparation method thereof. Background technique [0002] The growing energy demand and severe environmental pollution have made people aware of the need to get rid of their dependence on fossil fuels, and the development of renewable energy has led to a surge in demand for electrical energy storage. Rechargeable aqueous zinc-ion batteries (ZIBs) are inexpensive and high specific capacity (820 mAh g −1 ), good compatibility with water and other advantages, it has gained widespread attention. However, aqueous batteries are limited by the water electrolysis reaction, resulting in devices with lower operating voltages and lower energy densities than batteries with organic electrolytes. Current studies have...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/36H01M10/38
CPCH01M10/36H01M10/38Y02P70/50Y02E60/10
Inventor 刘金章王娜
Owner BEIHANG UNIV
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