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Magnesium ion battery cathode material of novel microstructure and preparation method thereof

A technology of magnesium ion battery and positive electrode material, applied in the field of new microstructured magnesium ion battery positive electrode material and its preparation, can solve the problems of low reversible capacity, poor rate performance, etc. The effect of porous structure

Active Publication Date: 2020-11-10
HARBIN UNIV OF SCI & TECH
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a novel microstructure magnesium ion battery positive electrode material and a preparation method thereof aiming at the current status of low reversible capacity and poor rate performance of existing magnesium ion battery electrode materials

Method used

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  • Magnesium ion battery cathode material of novel microstructure and preparation method thereof
  • Magnesium ion battery cathode material of novel microstructure and preparation method thereof
  • Magnesium ion battery cathode material of novel microstructure and preparation method thereof

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Embodiment 1

[0033] The preparation process of Na-Mn-O electrode material:

[0034] (1) Add 2 g of manganese trioxide and 0 g of titanium dioxide powder to 40 mL of 10 mol / L sodium hydroxide solution, and stir at 350 r / min for 30 min with a magnetic stirrer at room temperature until the powder dissolves.

[0035] (2) Move the solution obtained in (1) from the magnetic stirrer to an ultrasonic cleaner, ultrasonicate for 30 minutes at a power of 70W until it is completely dispersed, then move the fully dispersed solution to the magnetic stirrer again, and stir at a speed of 450r / min 30min.

[0036] (3) Move the completely dissolved solution into a hydrothermal synthesis reaction kettle, tighten the lid of the kettle, and move into a constant temperature oven. Heating at constant temperature at 170°C for 60h gave the preliminary product.

[0037] (4) Collect the preliminary product step by step into centrifuge tubes, place the centrifuge tubes symmetrically in the centrifuge, centrifuge at ...

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Abstract

The invention discloses a magnesium ion battery positive electrode material of a novel microstructure and a preparation method thereof, and belongs to the technical field of battery materials. The invention solves the problems of low reversible capacity, poor rate capability and the like of the electrode material of the existing magnesium ion battery positive electrode. The preparation method comprises the following steps: dissolving manganese oxide in a high-concentration sodium hydroxide solution environment, carrying out hydrothermal reaction and centrifugation, directly freeze-drying the product to prepare a nanosheet and nanowire blended NaMnO electrode material, and adding titanium oxide in the same preparation process to prepare the Ti-doped NaMnO electrode material. The obtained nanosheet and nanowire blended NaMnO electrode material has higher tap density, reversible capacity, rate capability and good cycling stability, and the reversible capacity, the rate capability and thecycling stability are further improved by doping the designed Ti-doped NaMnO electrode material.

Description

technical field [0001] The invention relates to a magnesium ion battery cathode material with a novel microstructure and a preparation method thereof, belonging to the technical field of battery materials. Background technique [0002] Ion secondary batteries, as a kind of energy storage method with green environmental protection, high energy density and long cycle life, have been widely used in portable electronic devices, new energy vehicles, smart grids and other fields. As various regions actively respond to the national call for energy conservation and emission reduction, it is particularly important to develop ion battery electrode materials with higher energy density, longer cycle life, and higher charge and discharge efficiency. Among them, since the magnesium ion has two charges, it has a higher energy density than the lithium ion battery. Moreover, magnesium is abundant in reserves and low in price, so that magnesium secondary batteries are considered to be a new ...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/505H01M4/485H01M10/054B82Y30/00B82Y40/00F26B5/06
CPCB82Y30/00B82Y40/00F26B5/06H01M4/362H01M4/485H01M4/505H01M10/054H01M2004/021H01M2004/028Y02E60/10
Inventor 张永泉姚安权迟庆国张天栋张昌海
Owner HARBIN UNIV OF SCI & TECH
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