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Preparation method of sodium ion battery positive electrode material titanium sodium manganate

A technology for sodium ion batteries and cathode materials, applied in battery electrodes, positive electrodes, secondary batteries, etc., can solve problems such as material performance not showing significant improvement, preparation process not being fully optimized, and structural instability. Good performance, simple and efficient synthesis process, and low synthesis cost

Pending Publication Date: 2020-05-19
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Na 0.44 MnO 2 The material provides a tunnel-type structure that facilitates the extraction and insertion of sodium ions, but there are still shortcomings such as structural instability. It is necessary to further improve its basic structure and optimize its surface composition through doping and surface coating to improve its electrochemical performance.
Various elements, such as Fe, Co, Ti, K, etc., have been used in the published research work to optimize the structure, but it is worth noting that the properties of these obtained materials have not shown significant improvement. The main reason is that the elements The preparation process is not fully optimized when doping

Method used

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  • Preparation method of sodium ion battery positive electrode material titanium sodium manganate
  • Preparation method of sodium ion battery positive electrode material titanium sodium manganate
  • Preparation method of sodium ion battery positive electrode material titanium sodium manganate

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Embodiment 1

[0035] A preparation method of sodium titanmanganate, a positive electrode material for a sodium ion battery, comprising the following steps:

[0036] Add sodium carbonate, manganese acetate, and n-butyl titanate to the pre-prepared oxalic acid solution at a molar ratio of 0.44:0.22:0.78 and mix uniformly to obtain product one; stir the product one at 60°C for 1 hour, then set Evaporate in an air drying oven at 80°C for 12h to make it dry, then grind in a mortar for 30min to obtain product 2, place the product 2 in a muffle furnace and sinter at 900°C for 3 hours in an air atmosphere, then cool to room temperature to get Na 0.44 Ti 0.22 mn 0.78 o 2 ,Such as figure 1 Shown is the SEM surface topography of the material, as image 3 Shown is the XRD spectrum of the material. .

Embodiment 2

[0038] A preparation method of sodium titanmanganate, a positive electrode material for a sodium ion battery, comprising the following steps:

[0039] Add sodium carbonate, manganese acetate, and n-butyl titanate to the pre-prepared oxalic acid solution at a molar ratio of 0.44:0.10:0.90 and mix uniformly to obtain product one; stir the product one at 60°C for 1 hour, then set Evaporate in an air drying oven at 80°C for 12h to make it dry, then grind in a mortar for 30min to obtain product 2, place the product 2 in a muffle furnace and sinter at 900°C for 3 hours in an air atmosphere, then cool to room temperature to get Na 0.44 Ti 0.11 mn 0.89 o 2 ,Such as figure 2 Shown is the SEM surface topography of the material.

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Abstract

The invention discloses a preparation method of sodium ion battery positive electrode material titanium sodium manganate. The technical process is as follows: respectively adding a specific sodium source into an oxalic acid solution; uniformly mixing manganese source and titanium source compounds; carrying out stirring for 1 hour at 60 DEG C; then, putting the mixture into an air drying oven and evaporating for 12h at 70-90 DEG C to evaporate the mixture to dryness; and grinding the mixture in a mortar for 20-30 minutes, carrying out sintering in a muffle furnace at 800-1000 DEG C for 2-12 hours under a certain atmosphere condition, and cooling to room temperature to obtain a Na0.44TixMn1-x O2 positive electrode material with a stable structure and good cycle performance.

Description

technical field [0001] The invention relates to the technical field of electrochemical energy storage and preparation of electrode materials for secondary batteries, in particular to a preparation method of sodium titanomanganate, a positive electrode material for a sodium ion battery. Background technique [0002] In recent years, the research and development of sodium-ion batteries has become a research hotspot in the field of energy storage at home and abroad. Sodium is widely distributed in nature and is cheap. It is in the same main group as lithium and has similar physical and chemical properties. The working principles of sodium-ion batteries and lithium-ion batteries are similar. , but cheaper transition metal elements can be used for electrode materials, so there is a lot of room for development in terms of reducing costs and reducing dependence on natural resource supply. Sodium-ion batteries are expected to become battery devices for large-scale energy storage in t...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/485H01M4/505H01M10/054
CPCH01M4/362H01M4/485H01M4/505H01M10/054H01M2004/028Y02E60/10
Inventor 张鼎王文洋史文静赵海军段东红刘世斌吴玉程
Owner TAIYUAN UNIV OF TECH
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