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High salt-tolerant solid-state electrolyte, solid-state flexible zinc-manganese battery and preparation method thereof

A solid-state electrolyte and zinc-manganese battery technology, which is applied in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, solid electrolytes, etc., can solve the problems of inability to form practical solid-state rechargeable zinc-manganese batteries, poor conductivity of manganese dioxide, and variable capacity conductive substrates. Brittleness and other problems, to achieve excellent adhesion, simple preparation method, excellent flexibility and stability

Inactive Publication Date: 2019-09-24
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Manganese dioxide is widely used in electrode materials for lithium batteries, supercapacitors and zinc-manganese batteries due to its non-toxic, environmentally friendly, low price and high electrochemical activity. Excessive amount will make the conductive substrate brittle, so it is very important to balance conductivity, capacity and flexibility
However, sulfate has a strong salting-out ability as an electrolyte, and it is difficult to gel, so it is impossible to form a practical solid-state rechargeable zinc-manganese battery

Method used

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  • High salt-tolerant solid-state electrolyte, solid-state flexible zinc-manganese battery and preparation method thereof

Examples

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preparation example Construction

[0040] The embodiment of the present invention also provides the preparation method of the solid-state flexible zinc-manganese battery, including:

[0041] Provide the high salt-tolerant solid-state electrolyte as an electrolyte,

[0042] Provide a carbon nanotube film or carbon nanotube fiber loaded with manganese oxide on the surface as a positive electrode,

[0043] Provide zinc flakes or zinc particles as the negative electrode,

[0044] The electrolyte is compressed and packaged between the positive electrode and the negative electrode to form the solid flexible zinc-manganese battery.

[0045] Further, the preparation method includes: performing surface protonation treatment on the carbon nanotube film or carbon nanotube fiber, and then depositing manganese oxide on the carbon nanotube film or carbon nanotube fiber.

[0046] Preferably, the preparation method includes: providing carbon nanotube film or carbon nanotube fiber, at least 1-12mol / L -l Protonize the surface...

Embodiment 1

[0052] The preparation process of solid-state flexible zinc-manganese battery (also known as solid-state rechargeable zinc-manganese battery) specifically includes:

[0053] Preparation of high salt-tolerant solid electrolyte:

[0054] The present invention uses xanthan gum as the solid carrier of the electrolyte. Xanthan gum is an extracellular microbial polysaccharide produced by the intoxication of sugars through Xanthomonas. Due to its special macromolecular structure and colloidal characteristics, it is currently the It integrates thickening, suspension, emulsification and stabilization. The bio-glue with the best performance, its molecular structure is as follows figure 2 As shown, the pyruvate group contained at the end of the molecular side chain of xanthan gum can recombine with the cations in the electrolyte, and then the side chain is wound on the main chain, which ensures the stability of xanthan gum in high-concentration salt solution. analysis, its salting-out ...

Embodiment 2

[0062] The preparation process of solid-state flexible zinc-manganese battery (also known as solid-state rechargeable zinc-manganese battery) specifically includes:

[0063] Preparation of high salt-tolerant solid electrolyte:

[0064] At room temperature, dissolve 0.1g xanthan gum into 50ml containing 2mol / L ZnSO 4 and 0.1mol / L MnSO 4 In the aqueous solution, stir to form a colloidal electrolyte, that is, zinc sulfate / manganese sulfate / xanthan gum electrolyte. Under this ratio, its ionic conductivity can reach 2.5×10 -2 S / cm.

[0065] Electrode preparation and battery packaging methods are the same as in Example 1.

[0066] Under room temperature conditions, the solid-state flexible zinc-manganese battery prepared in this example was subjected to cycle charge and discharge tests at a constant rate of 5C. The test results were basically consistent with those in Example 1. It can maintain a capacity of 180mAh / g, and the Coulombic efficiency is close to 100%. The solid-stat...

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Abstract

The invention discloses a high salt-tolerant solid-state electrolyte, a solid-state flexible zinc-manganese battery and a preparation method thereof. The high salt-tolerant solid-state electrolyte comprises a solid-state carrier and an electrolyte loaded by the carrier. The electrolyte is neutral or weak acidic, and the solid-state carrier is formed by xanthan gum. The solid-state flexible zinc-manganese battery comprises a positive electrode, a negative electrode and an electrolyte, wherein the electrolyte is the high salt-tolerant solid-state electrolyte. The high salt-tolerant solid-state electrolyte provided by the invention does not need to add a binder, and has high charge stability and excellent adhesion when serving as an electrolyte of the battery and can be well laminated to an electrode. The zinc-manganese battery taking a carbon nanotube film or fiber deposited with manganese oxide on the surface as the positive electrode based on the high salt-tolerant solid-state electrolyte and surface has excellent flexibility and stability, and is particularly applicable to flexible wearable equipment.

Description

technical field [0001] The invention particularly relates to a high-salt-tolerant solid-state electrolyte, a solid-state flexible zinc-manganese battery and a preparation method thereof, belonging to the technical field of new energy storage devices. Background technique [0002] The rapid development of modern wearable and portable electronic devices urgently requires flexible, wearable and safe flexible energy storage batteries, and zinc-manganese batteries have been widely used due to their low price, environmental friendliness and safety. At present, most of the zinc-manganese dry batteries in the high-concentration potassium hydroxide electrolyte are used on the market. The further application of zinc-manganese batteries is hindered by problems such as poor chargeability in potassium hydroxide solution, low Coulombic efficiency, and zinc dendrites. . In recent years, there have been many reports on improving the specific capacity, energy density, cycle life and coulomb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/056H01M10/058B82Y30/00
CPCB82Y30/00H01M10/056H01M10/058H01M2220/30H01M2300/0065H01M2300/0088Y02E60/10Y02P70/50
Inventor 邸江涛张思兰李清文
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI