Zinc ion battery and manufacturing method thereof

A zinc ion battery and anion technology, applied in the field of materials, can solve the problems of zinc ion battery to be improved, narrow electrochemical window, and high freezing point.

Active Publication Date: 2020-04-10
REHAB QINGDAO ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing water-based electrolytes are limited by the water splitting potential, have a narrow electrochemical window, high cost, and high freezing point, and the conductivity is greatly affected by temperature, resulting in poor electrochemical performance.
[0003] Thereby, the related technology of existing zinc-ion battery still needs to be improved

Method used

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  • Zinc ion battery and manufacturing method thereof
  • Zinc ion battery and manufacturing method thereof
  • Zinc ion battery and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Put the urea in a vacuum drying oven at 60°C for 12 hours, and cool it for later use; add ZnCl 2 Dry in a vacuum oven at 200°C for 3 hours, then cool for later use. Then ZnCl 2 Mix it with urea at a molar ratio of 1:3 and place it in a three-necked flask, heat and stir at 90°C to make it molten and clear. After the ionic liquid is cooled, measure the volume of the liquid with a graduated cylinder, and weigh it according to the volume of the liquid. A certain mass of NaCl makes the NaCl concentration 1.5mol / L. Finally, the aforementioned liquid and NaCl were added into the three-necked flask, and reheated to 90° C. to obtain the ionic liquid.

[0061] Battery assembly: positive pole MnO 2 or ZnMn 2 o 4 ; the negative pole is zinc foil or zinc powder made by drawing copper net current collector; the diaphragm is PP diaphragm or AGM diaphragm, specifically, after the diaphragm is fully soaked in the ionic liquid electrolyte, it is combined with the positive electrode ...

Embodiment 2

[0070] Others are the same as in Example 1, except that the molar ratio of ZnCl2 to urea is 1:2.

[0071] The specific capacity of the battery at a current density of 50mA / g at 25°C is 51mAh / g.

Embodiment 3

[0073]Others are the same as in Example 1, except that the molar ratio of ZnCl2 to urea is 1:4.

[0074] The specific capacity of the battery at a current density of 50mA / g at 25°C is 46.3mAh / g.

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Abstract

The invention provides a zinc ion battery and a manufacturing method thereof. The zinc ion battery is provided with: a negative electrode, a positive electrode and electrolyte, wherein the electrolyteis ionic liquid, and the ionic liquid comprises coordination cations formed by coordination of metal zinc and organic Lewis base; and anions. The zinc ion battery is safe, environment-friendly and low in cost, the negative electrode of the zinc ion battery is not easy to grow zinc dendrite, the gassing side reaction is less in the electrolyte, the specific capacity is high, and the cycle performance at a lower temperature is good.

Description

technical field [0001] The invention relates to the technical field of materials, in particular to a zinc ion battery and a manufacturing method thereof. Background technique [0002] In current zinc-ion batteries, the electrolyte used is an aqueous electrolyte containing zinc ions (such as ZnSO 4 ) or high-cost zinc triflate. However, the existing water-based electrolytes are limited by the water splitting potential, have a narrow electrochemical window, high cost, and high freezing point, and the conductivity is greatly affected by temperature, resulting in poor electrochemical performance. [0003] Therefore, the related technologies of existing zinc-ion batteries still need to be improved. Contents of the invention [0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. For this reason, an object of the present invention is to propose a safe and environmentally friendly, low-cost, negative electrode...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/36H01M10/38H01M10/42
CPCH01M10/365H01M10/36H01M10/38H01M10/4235Y02E60/10Y02P70/50
Inventor 罗云峰刘正军罗小松刘昱陈璞
Owner REHAB QINGDAO ENERGY TECH CO LTD
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