Composite solid-state electrolyte as well as preparation method and application thereof

A technology of solid electrolytes and electrolytes, applied in electrolytes, circuits, electrical components, etc., can solve the problems of low ionic conductivity and achieve high ionic conductivity, inhibited growth, and low preparation temperature

Active Publication Date: 2019-03-01
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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  • Composite solid-state electrolyte as well as preparation method and application thereof
  • Composite solid-state electrolyte as well as preparation method and application thereof
  • Composite solid-state electrolyte as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
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-state electrolyte and a preparation method thereof. The composite solid-state electrolyte comprises a solid-state substrate and an electrolyte mixed into the substrate, wherein the electrolyte comprises zinc salts; the solid-state substrate is formed by compounding K type carrageenan and paper. According to the preparation method provided by the invention,the K type carrageenan and the paper are compounded into a composite solid-state electrolyte substrate, and the formed solid-state electrolyte has high ionic conductivity, and can be used as an electrolyte material for an all-solid-state zinc ion battery. The composite solid-state electrolyte provided by the invention has high ionic conductivity, so that the specific capacity and the rate performance of a battery are favorably improved. The composite solid-state electrolyte can inhibit the growth of negative electrode zinc dendrite, so that the battery cycle performance is favorably improved.The invention also provides a solid-state zinc ion battery comprising the K type carrageenan / paper solid-state electrolyte, and good application and development prospects are realized in the aspects of portable foldable flexible electronics and energy source devices. The preparation method provided by the invention is simple, and helps reduce the cost.

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 Applications(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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