Solid-state electrolyte as well as preparation method and application thereof

A solid electrolyte, electrolyte technology, applied in the direction of electrolyte immobilization/gelation, circuits, electrical components, etc., can solve the problem of low ionic conductivity, and achieve high ionic conductivity, high ionic conductivity, and low preparation temperature. Effect

Inactive Publication Date: 2019-03-01
PEKING UNIV SHENZHEN GRADUATE SCHOOL
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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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  • Solid-state electrolyte as well as preparation method and application thereof
  • Solid-state electrolyte as well as preparation method and application thereof
  • Solid-state electrolyte as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0040] The invention provides a method for preparing a solid electrolyte, comprising the following steps:

[0041] The electrolyte and guar gum are mixed in water to solidify the guar gum to obtain a solid electrolyte.

[0042] The 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.

[0043] see figure 1, figure 1 The flow chart of the preparation method of the guar gum solid electrolyte provided by the embodiment of the present invention.

[0044] In the embodiments of the present invention, a mixed solution of zinc salt and manganese salt with a certain concentration is prepared according to a certain molar ratio; that is, the electrolyte is mixed with water...

Embodiment 1

[0055] Example 1---Guar Gum Solid Electrolyte and All-Solid Zinc-ion Battery

[0056] Step 1. Configure 2M ZnSO 4 Solution A;

[0057] Step 2: Mix 10 mL of solution A with 0.6 g of guar gum and stir thoroughly to obtain mixture B.

[0058] Step 3, standing at room temperature, waiting for the mixture B to solidify, to obtain the guar gum solid electrolyte.

[0059] Put the above-mentioned guar gum 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.

[0060] The rate performance test of the battery was carried out at 0.3A·g -1 The specific capacity of the battery at the current density is 187.0mAh·g -1 , at 6.0A·g -1 The specific capacity of the battery at the current density is 88.3mAh g -1 , indicating that the battery ...

Embodiment 2

[0061] Embodiment 2---guar gum solid electrolyte

[0062] Step 1. Configure 2M ZnSO 4 and 0.1M MnSO 4 mixed solution A;

[0063] Step 2: Mix 10 mL of solution A with 0.6 g of guar gum and stir thoroughly to obtain mixture B.

[0064] Step 3, standing at room temperature, waiting for the mixture B to solidify, to obtain the guar gum solid electrolyte.

[0065] image 3 In order to utilize the physical photo of the guar gum solid electrolyte of the present invention, it can be seen from this figure that the guar gum solid electrolyte has good mechanical flexibility.

[0066] Figure 4 For utilizing the Nyquist diagram of the guar gum solid electrolyte of the present invention, the intercept of the free diffusion straight line on the x-axis in the Nyquist diagram is the total impedance of the solid electrolyte, so, from Nyquist It can be seen from the figure that the impedance of the solid electrolyte sample is 2.1Ω. At the same time, according to the relationship between c...

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Abstract

The invention provides a solid-state electrolyte and a preparation method thereof. The solid-state electrolyte comprises guar gum and an electrolyte mixed into the guar gum, wherein the electrolyte comprises zinc salts. The guar gum solid-state electrolyte used in the embodiment of the invention has high ionic conductivity, so that the specific capacity and the rate performance of a battery can befavorably improved. The solid-state electrolyte has good flexibility, so that the original capacity of the solid-state battery can be favorably maintained under the bending condition. The solid-stateelectrolyte can inhibit the growth of negative electrode zinc dendrite, so that the battery cycle performance is favorably improved. The used guar gum is a food additive, and is non-toxic and harmless on human bodies. The preparation method of the solid-state electrolyte is simple, and the raw materials are cheap, so that the manufacturing cost is favorably reduced. The invention also provides asolid-state zinc ion battery comprising the guar gum solid-state electrolyte, and good application and development prospects are realized in the aspects of portable foldable flexible electronics and energy source devices.

Description

technical field [0001] The invention relates to the technical field of preparation of zinc ion batteries, in particular to a solid electrolyte, its preparation method and application, and in particular to an all-solid zinc ion battery using guar gum 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 an aqueous solution containing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/36
CPCH01M10/36H01M2300/0085Y02E60/10
Inventor 周航黄媛张吉延
Owner PEKING UNIV SHENZHEN GRADUATE SCHOOL
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