A method for preparing graphene/sodium manganate flexible film and a method for preparing aqueous sodium-zinc composite battery using it

A flexible thin film, composite battery technology, applied in graphene, battery electrodes, secondary batteries and other directions, can solve the problems of low conductivity, unstable electrochemical performance, cumbersome preparation process, etc., to improve the conductivity and improve the electrochemical performance. Performance, simple process effect

Active Publication Date: 2019-07-05
ANKANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of cumbersome preparation process, low electrical conductivity and unstable electrochemical performance of existing battery cathode materials, and provide a method for preparing graphene / sodium manganate flexible film and using it to prepare aqueous sodium zinc Composite battery method

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  • A method for preparing graphene/sodium manganate flexible film and a method for preparing aqueous sodium-zinc composite battery using it
  • A method for preparing graphene/sodium manganate flexible film and a method for preparing aqueous sodium-zinc composite battery using it
  • A method for preparing graphene/sodium manganate flexible film and a method for preparing aqueous sodium-zinc composite battery using it

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specific Embodiment approach 1

[0030] Specific embodiment one: present embodiment is a kind of method for preparing graphene / sodium manganate flexible film, specifically completes according to the following steps:

[0031] 1. Mn 2 o 3 Add it into the NaOH solution with a concentration of 5mol / L, and then stir and react for 30min to 150min at a stirring speed of 300r / min to 1200r / min to obtain Mn 2 o 3 solution; the Mn 2 o 3 Transfer the solution to a hydrothermal reaction kettle, and then keep the temperature at 120°C to 250°C for 10h to 60h to obtain the reaction product; use distilled water to wash the reaction product for 3 to 5 times, and then heat it at a temperature of 50°C to 100°C Dry for 5h-12h to get Na 4 mn 9 o 18 powder;

[0032] Mn described in step 1 2 o 3 The volume ratio of the amount of the substance and the NaOH solution whose concentration is 5mol / L is (1mmol~2mmol): 30mL;

[0033] 2. Add graphene oxide into deionized water, and then ultrasonically disperse at room temperature ...

specific Embodiment approach 2

[0046] Specific embodiment 2: the difference between this embodiment and specific embodiment 1 is: Mn described in step 1 2 o 3 The volume ratio of the amount of the substance to the NaOH solution whose concentration is 5mol / L is (1.5mmol~2mmol):30mL. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0047] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the volume ratio of the mass of graphene oxide described in step 2 to deionized water is (30mg-40mg): 10mL. Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a method for preparing a graphene / sodium manganate flexible thin film and a method using the graphene / sodium manganate flexible thin film to prepare an aqueous sodium-zinc compound battery, relates to methods for preparing graphene thin films and methods using the graphene thin films to prepare compound batteries, and aims to solve the problem that an existing battery anode material is complex in preparation process, low in conductivity and unstable in electrochemical performance. The method for preparing the graphene / sodium manganate flexible thin film includes the steps of firstly, preparing Na4Mn9O18 powder; secondly, adding graphene oxide into deionized water, and performing ultrasonic treatment to obtain a solution A; thirdly, preparing a graphene oxide / sodium manganate flexible thin film; fourthly, drying the graphene oxide / sodium manganate flexible thin film to obtain the graphene / sodium manganate flexible thin film. The prepared graphene / sodium manganate flexible thin film is simple in process, has sufficient toughness, can be curled at will and can be directly cut to serve as a flexible electrode. By the methods, the graphene / sodium manganate flexible thin film and the aqueous sodium-zinc compound battery can be prepared.

Description

technical field [0001] The invention relates to a preparation method for preparing a graphene film and a method for preparing a composite battery using the same. Background technique [0002] The development of high energy and power density, low-cost rechargeable batteries is of great significance for the widespread application of hybrid electric vehicles and electric vehicles. The current lithium-ion batteries usually use organic electrolytes, which require harsh preparation conditions (requiring an oxygen-free and water-free environment), high prices, and low safety. LiCl, LiNO 3 Aqueous solutions of lithium salts such as lithium salts replace organic electrolytes, which have the advantages of high conductivity, low viscosity, stable ion state, low price, and high safety. However, the current water-based lithium-ion battery positive electrode sheet mostly uses LiMn 2 o 4 The positive electrode material is mixed with conductive agent and adhesive, and prepared by pulpin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/583H01M4/62H01M4/525H01M10/36C01B32/184
CPCH01M4/525H01M4/583H01M4/625H01M10/36Y02E60/10
Inventor 袁光辉金华峰姚茉莉
Owner ANKANG UNIV
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