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A kind of composite solid electrolyte, its preparation method and application

A solid-state electrolyte and electrolyte technology, applied in electrolytes, circuits, electrical components, etc., can solve problems such as low ionic conductivity, achieve high ionic conductivity, improve mechanical flexibility, and simple preparation steps.

Active Publication Date: 2020-11-27
ZINERGY SHENZHEN LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Existing solid-state electrolytes for zinc-ion batteries mainly use synthetic polymer matrices, but they suffer from low ionic conductivity.

Method used

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  • A kind of composite solid electrolyte, its preparation method and application
  • A kind of composite solid electrolyte, its preparation method and application
  • A kind of composite solid electrolyte, its preparation method and application

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Experimental program
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Effect test

preparation example Construction

[0043] The invention provides a method for preparing a composite solid electrolyte, comprising the following steps:

[0044] S1, mixing electrolyte and K-type carrageenan in water to obtain a mixture; the electrolyte includes zinc salt;

[0045] S2. The paper is brought into contact with the mixture, and the K-type carrageenan in it is solidified to obtain a composite solid electrolyte.

[0046] The composite solid electrolyte prepared by the invention has the characteristics of high ion conductivity and the like, can be used as an electrolyte material for an all-solid zinc ion battery, and is beneficial to improving the specific capacity and rate performance of the battery. The preparation method of the invention is simple and beneficial to reducing the manufacturing cost.

[0047] see figure 1 , figure 1 The flow chart of the preparation method of the K-type carrageenan / rice paper composite solid electrolyte provided by the embodiment of the present invention.

[0048] I...

Embodiment 1

[0060] Example 1---K-type carrageenan electrolyte / rice paper solid electrolyte and solid zinc ion battery

[0061] Step 1. Configure 2MZnSO 4 Solution A;

[0062] Step 2: Mix 10mL of solution A with 2g of K-type carrageenan and stir thoroughly to obtain mixture B.

[0063] Step 3. Put the rice paper with a thickness of 50 μm into the mixture B to moisten it, let it stand still, and wait for the K-type carrageenan electrolyte on the upper and lower surfaces of the rice paper to solidify to obtain the K-type carrageenan electrolyte / rice paper solid electrolyte.

[0064] Put this K-type carrageenan / rice paper solid electrolyte into the zinc-ion battery system, and the positive electrode active material used in the zinc-ion battery is α-MnO 2 , the conductive agent is graphene, and the current collector is carbon cloth. The negative electrode active material is zinc, and the current collector is carbon cloth.

[0065] The rate performance test of the battery was carried out at...

Embodiment 2

[0066] Embodiment 2---K-type carrageenan electrolyte / rice paper solid electrolyte

[0067] Step 1. Configure 2M ZnSO 4 and 0.1M MnSO 4 mixed solution A;

[0068] Step 2: Mix 10 mL of mixed solution A with 2 g of K-type carrageenan, and stir thoroughly to obtain mixture B.

[0069] Step 3. Put the rice paper with a thickness of 50 μm into the mixture B to wet it, and let it stand until the K-type carrageenan electrolyte on the upper and lower surfaces of the rice paper is solidified to obtain the K-type carrageenan electrolyte / rice paper solid electrolyte.

[0070] image 3 In order to utilize the physical photo of the composite solid electrolyte of the present invention, it can be seen from the figure that this composite solid electrolyte has good flexibility.

[0071] Figure 4 In order to utilize the Nyquist diagram of the composite solid electrolyte of the present invention, the intercept of the free diffusion line on the x-axis in the Nyquist diagram is the total impe...

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Abstract

The invention provides a composite solid electrolyte and a preparation method thereof. The composite solid electrolyte comprises: a solid substrate and an electrolyte incorporated into the solid substrate; the electrolyte includes a zinc salt; the solid substrate is composed of K-type carrageenan and Composite paper. The invention utilizes K-type carrageenan and paper to compound a composite solid electrolyte matrix, and the formed solid electrolyte has high ion conductivity, and can be used as an electrolyte material for an all-solid zinc ion battery. The composite solid electrolyte of the invention has high ion conductivity, which is beneficial to improving the specific capacity and rate performance of the battery. The composite solid electrolyte can inhibit the growth of negative electrode zinc dendrites, which is beneficial to improve the cycle performance of the battery. The present invention also provides a solid-state zinc-ion battery, which includes the above-mentioned K-type carrageenan / paper solid electrolyte, and has good application and development prospects in portable and foldable flexible electronic and energy devices. The preparation method of the invention is simple and beneficial to cost reduction.

Description

technical field [0001] The invention relates to the technical field of preparation of zinc ion batteries, in particular to a composite solid electrolyte, its preparation method and application, in particular to a solid zinc ion battery using K-type carrageenan / rice paper composite solid electrolyte as electrolyte. Background technique [0002] Zinc-ion batteries (such as Zn / MnO 2 ) is a new type of secondary battery developed in recent years. It has the advantages of high theoretical energy density, good safety, and low cost. It has broad application prospects in high-performance electronic devices and other devices. In Zn-ion batteries, Zn ions are rapidly and reversibly deposited and dissolved on the surface of the metal Zn anode, and reversibly intercalated or deintercalated in the cathode material. Common zinc-ion batteries use manganese dioxide, vanadium pentoxide, etc. as the positive electrode active material, metal zinc as the negative electrode active material, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/38H01M10/42
CPCH01M10/38H01M10/4235H01M2300/0094Y02E60/10Y02P70/50
Inventor 周航黄媛刘久炜
Owner ZINERGY SHENZHEN LTD
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