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BaSO4-doped negative electrode material of sodium ion battery and preparation method thereof

A technology of sodium ion battery and negative electrode material, which is applied to battery electrodes, circuits, electrical components, etc., can solve the problems of insufficient cycle performance and rate performance of negative electrode materials of sodium ion battery, and improve the initial capacity, cycle stability, and preparation cost. Low, simple process effect

Active Publication Date: 2021-06-25
NORTHEASTERN UNIV LIAONING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it can be seen from the literature search that the cycle performance and rate performance of the current sodium-ion battery anode materials are still insufficient.

Method used

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  • BaSO4-doped negative electrode material of sodium ion battery and preparation method thereof
  • BaSO4-doped negative electrode material of sodium ion battery and preparation method thereof
  • BaSO4-doped negative electrode material of sodium ion battery and preparation method thereof

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preparation example Construction

[0034] The invention provides a doped BaSO 4 A negative electrode material for a sodium ion battery and a preparation method thereof, comprising the following preparation steps:

[0035] (1) One-step hydrothermal method to prepare SnO 2 Materials: Use tin source, dispersant and NaOH as raw materials for hydrothermal reaction, wherein the molar ratio of tin source to NaOH is 1:10-15, and the volume ratio of dispersant to NaOH is 1:1-1.5. After the reaction, centrifuge to collect the precipitate. SnO obtained after drying 2 material precursors;

[0036] The tin source is one or more of stannous chloride, tin tetrachloride, sodium thiostannate; the dispersant is one or more of PEG-400, PVP, DMF; the concentration of NaOH is 1~ 2mol / L; the hydrothermal reaction temperature is 120-200°C, and the reaction time is 10-24h.

[0037] (2) SnO 2 The material precursor is dissolved in deionized water, slowly adding dilute sulfuric acid solution and Ba(OH) 2 solution, magnetic stirrin...

Embodiment 1

[0051] ①Using crystalline tin tetrachloride, N,N-dimethylformamide and sodium hydroxide as raw materials, weigh 2mmol SnCl 4 ·5H 2 O and 10ml of DMF were dissolved in 10ml of distilled water, and 10ml of NaOH solution with a concentration of 2mol / L was added dropwise with stirring. Stir the solution evenly and transfer it into the reactor. After hydrothermal reaction at 160°C for 15 hours, wash the precipitate with distilled water and absolute ethanol three times, and dry at 60°C for 12 hours to obtain white SnO 2 Precursor.

[0052] ② Take 5g SnO 2 Dissolve the powder in 50ml deionized water, add 5ml 0.5mol / L Ba(OH) to it under magnetic stirring 2 The prepared solution and 7.5ml 0.5mol / L dilute sulfuric acid solution were magnetically stirred at room temperature for 1 hour, and then the resulting solution was washed with distilled water and absolute ethanol three times to achieve solid-liquid separation, and then placed in a drying oven at 60°C for 12 hours. , Grind the d...

Embodiment 2

[0058] ①Using crystalline tin tetrachloride, N,N-dimethylformamide and sodium hydroxide as raw materials, weigh 2mmol SnCl 4 ·5H 2 O and 10ml of DMF were dissolved in 10ml of distilled water, and 10ml of NaOH solution with a concentration of 2mol / L was added dropwise with stirring. Stir the solution evenly and transfer it into the reactor. After hydrothermal reaction at 160°C for 15 hours, wash the precipitate with distilled water and absolute ethanol three times, and dry at 60°C for 12 hours to obtain white SnO 2 Precursor.

[0059] ② Take 5g SnO 2 Dissolve the powder in 50ml deionized water, add 3.5ml 0.5mol / LBa(OH) to it under magnetic stirring 2 The prepared solution and 10ml of 0.5mol / L dilute sulfuric acid solution were magnetically stirred at room temperature for 1 hour, and the resulting solution was washed with distilled water and absolute ethanol three times to achieve solid-liquid separation, and then placed in a drying oven at 60°C for 12 hours. Grind the dried...

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Abstract

The invention relates to a BaSO4-doped negative electrode material of a sodium ion battery and a preparation method thereof. The preparation method comprises the following steps: (1) preparing a SnO2 material by using a one-step hydrothermal method; (2) dissolving the SnO2 material in deionized water, and adding a dilute sulphuric acid solution and a Ba(OH)2 solution to obtain a BaSO4-doped SnO2 composite material; (3) preparing a ZnS / C composite material by a carbon thermal reduction method, namely dissolving zinc salt and a sulfur source serving as raw materials in deionized water, conducting reacting to obtain a ZnS material precursor, dissolving the precursor in deionized water, adding an organic carbon source, carrying out stirring until water is completely evaporated, and performing roasting in an inert atmosphere; and (4) mixing the BaSO4-doped SnO2 composite material and the ZnS / C composite material in proportion. The electrode material prepared by doping BaSO4 and by using the method disclosed by the invention can meet performance requirements on the negative electrode material of the sodium ion battery, and has relatively high initial capacity, relatively good specific capacity, relatively high first coulombic efficiency and ideal cycling stability, so the status of the sodium ion battery in an energy storage system is improved.

Description

technical field [0001] The invention relates to the technical field of battery materials, in particular to a doped BaSO 4 A negative electrode material for a sodium ion battery and a preparation method thereof. Background technique [0002] As an important means of energy storage and conversion, secondary battery technology is widely used in people's daily life, industrial production, military defense, aerospace and other fields. Therefore, secondary batteries play a vital role in the field of new energy. status. At present, lithium-ion batteries, which are the fastest-growing and most mature in the secondary battery system, have received widespread attention. However, lithium resources in the earth's crust are very limited, and people's consumption of lithium resources is increasing year by year, which not only stimulates the continuous increase of lithium prices, but also causes people's concerns about lithium reserves. Sodium ions have similar physical and chemical pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/48
CPCH01M4/48Y02E60/10
Inventor 李建中吴旭徐浩元郝熙娟高宣雯石俊杰于凯骆文彬
Owner NORTHEASTERN UNIV LIAONING
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