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Reduced graphene oxide/stannate sodium ion battery negative electrode material and preparation method and application thereof

A sodium-ion battery and negative electrode material technology, applied in battery electrodes, nanotechnology for materials and surface science, secondary batteries, etc., can solve problems such as capacity decay, limit practical applications, volume expansion, etc., and achieve improved conductivity , Improve the effect of volume expansion, and the effect of easy control of the process

Inactive Publication Date: 2018-11-13
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, ternary oxides will cause huge volume expansion during charging, leading to severe capacity fading, which limits its practical application.

Method used

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  • Reduced graphene oxide/stannate sodium ion battery negative electrode material and preparation method and application thereof
  • Reduced graphene oxide/stannate sodium ion battery negative electrode material and preparation method and application thereof
  • Reduced graphene oxide/stannate sodium ion battery negative electrode material and preparation method and application thereof

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Embodiment 1

[0067] In the present embodiment, a method for preparing a negative electrode material for a reduced graphene oxide / stannate (manganese stannate) sodium ion battery comprises the following steps:

[0068] Step 1. First, dissolve 0.5mmol manganese chloride and 0.5mmol sodium stannate in 10mL deionized water, stir for 2 hours, and then add 20mL graphene oxide solution (20mg graphene oxide is dissolved in 20mL deionized water, at a power of 300w conditions, ultrasonic cleaning 3h), and then magnetic stirring for 1h;

[0069] Step 2, then transfer to a polytetrafluoroethylene-lined hydrothermal reaction kettle, and heat and react at 180° C. for 24 hours. Cool to room temperature to obtain a suspension;

[0070] Step 3: Filtrate the suspension in step 2 to obtain a precipitate, which is washed three times with deionized water and absolute ethanol in sequence; and vacuum-dried at 60° C. for 12 hours. The reduced graphene oxide / stannate (manganese stannate) battery negative electro...

Embodiment 2

[0074] In the present embodiment, a method for preparing a negative electrode material for a reduced graphene oxide / stannate (cobalt stannate) sodium ion battery comprises the following steps:

[0075] Step 1, first take 0.5mmol cobalt chloride hexahydrate, 0.5mmol sodium stannate dissolved in 10mL deionized water, stir for 2h, then add 20mL graphene oxide solution (20mg graphene oxide is dissolved in 20mL deionized water, at power Under the condition of 300w, ultrasonic cleaning for 3h), and then magnetic stirring for 1h;

[0076] Step 2, then transfer to a polytetrafluoroethylene-lined hydrothermal reaction kettle, and heat and react at 180° C. for 24 hours. Cool to room temperature to obtain a suspension;

[0077] Step 3: Filtrate the suspension in step 2 to obtain a precipitate, which is washed three times with deionized water and absolute ethanol in sequence; and vacuum-dried at 60° C. for 12 hours. The reduced graphene oxide / stannate (cobalt stannate) battery negative ...

Embodiment 3

[0081] In the present embodiment, a method for preparing a negative electrode material for a reduced graphene oxide / stannate (zinc stannate) sodium ion battery comprises the following steps:

[0082] Step 1. First, dissolve 0.5mmol zinc chloride and 0.5mmol sodium stannate in 10mL deionized water, stir for 2 hours, and then add 20mL graphene oxide solution (20mg graphene oxide is dissolved in 20mL deionized water, at a power of 300w conditions, ultrasonic cleaning 3h), and then magnetic stirring for 1h;

[0083] Step 2, then transfer to a polytetrafluoroethylene-lined hydrothermal reaction kettle, and heat and react at 180° C. for 24 hours. Cool to room temperature to obtain a suspension;

[0084] Step 3: Filtrate the suspension in step 2 to obtain a precipitate, which is washed three times with deionized water and absolute ethanol in sequence; and vacuum-dried at 60° C. for 12 hours. The reduced graphene oxide / stannate (zinc stannate) battery negative electrode material is ...

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Abstract

The invention relates to a reduced graphene oxide / stannate sodium ion battery negative electrode material and a preparation method and application thereof. The preparation method comprises the following steps: dispersing an aqueous solution of chlorate and sodium stannate in a graphene oxide solution, performing a hydrothermal reaction to produce a suspension, performing solid-liquid separation toobtain a precipitate, and calcinating the precipitate at high temperature to obtain the reduced graphene oxide / stannate sodium ion battery negative electrode material, wherein the chlorate is manganese chloride, cobalt chloride hexahydrate or zinc chloride. Compared with the prior art, the preparation method provided by the invention has the advantages of a simple technology, easy process control, easy obtainment of raw materials, low cost and good repeatability. A prepared reduced graphene oxide / stannate (manganese stannate, cobalt stannate and zinc stannate) composite structure has good electrochemical sodium storage performance, and is a good sodium ion battery negative electrode material.

Description

technical field [0001] The invention relates to the technical field of battery material preparation, in particular to a reduced graphene oxide / stannate sodium ion battery negative electrode material and its preparation method and application. Background technique [0002] As an alternative to lithium-ion batteries, sodium-ion batteries have attracted increasing attention due to the advantages of abundant sodium resources, low cost, high efficiency, and stable chemical properties. Compared with Li-ion batteries, the main challenge for Na-ion batteries is to find a suitable anode material that can effectively support larger diameter Na-ion batteries. At present, some countries with relatively advanced battery technology in the world have listed sodium-ion battery technology as an important basic and forward-looking research field, and as the development direction of energy storage battery technology that will be focused on in the future. Actively exploring a new type of anode...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/48H01M4/50H01M4/52H01M4/62H01M4/131H01M10/054B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/131H01M4/362H01M4/483H01M4/502H01M4/523H01M4/62H01M4/625H01M4/628H01M10/054Y02E60/10
Inventor 温思颖赵家昌张震东公言梅徐菁利
Owner SHANGHAI UNIV OF ENG SCI
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