A kind of preparation method of spindle shape lithium manganese oxide hollow tube battery cathode material

A body-shaped lithium manganese oxide and battery positive electrode technology, which can be used in battery electrodes, secondary batteries, chemical instruments and methods, etc., can solve the problems of long synthesis reaction time, high equipment requirements, poor product uniformity, etc., and achieve good application prospects , large surface area, and the effect of improving crystallinity

Active Publication Date: 2021-02-26
UNIV FOR SCI & TECH ZHENGZHOU
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, the solid-phase method has a simple process, but the synthesis reaction time is long and the product uniformity is poor. The sol-gel method requires a large amount of organic reagents, which causes great environmental pollution, and the spray-drying method requires high equipment requirements.

Method used

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  • A kind of preparation method of spindle shape lithium manganese oxide hollow tube battery cathode material
  • A kind of preparation method of spindle shape lithium manganese oxide hollow tube battery cathode material

Examples

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Embodiment 1

[0026] A preparation method of a spindle-shaped lithium manganate hollow tube battery positive electrode material, comprising the steps of:

[0027] (1) Lithium nitrate is prepared into a 0.5mol / L lithium salt solution with deionized water; manganese acetate and potassium permanganate are mixed uniformly according to a molar ratio of 3:1, and then prepared into a manganese salt solution with deionized water , the total concentration of manganese ions in the manganese salt solution is 1mol / L; the urea solution with deionized water preparation concentration is 0.5mol / L;

[0028] (2) adding naphthalene in dehydrated alcohol, stirring to form a uniform solution;

[0029] (3) Add the lithium salt solution in step (1) into the hydrothermal reaction kettle, the amount of which is 1 / 4 of the volume of the hydrothermal reaction kettle, then add the ethanol solution of naphthalene, stir evenly to form a light white suspension Liquid, wherein the molar ratio of naphthalene to lithium io...

Embodiment 2

[0035] A preparation method of a spindle-shaped lithium manganate hollow tube battery positive electrode material, comprising the steps of:

[0036] (1) Lithium acetate and lithium chloride are prepared 1mol / L lithium salt solution with deionized water; Manganese nitrate and potassium permanganate are mixed evenly according to the molar ratio of 2:1, and then prepared with deionized water Manganese salt solution, the total concentration of manganese ions in the manganese salt solution is 1.2mol / L; the urea solution with deionized water preparation concentration is 0.5mol / L;

[0037] (2) adding naphthalene in dehydrated alcohol, stirring to form a uniform solution;

[0038] (3) Add the lithium salt solution in step (1) into the hydrothermal reaction kettle, the amount of which is 1 / 5 of the volume of the hydrothermal reaction kettle, then add the ethanol solution of naphthalene, stir evenly to form a light white suspension Liquid, wherein the molar ratio of naphthalene to lith...

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Abstract

The invention discloses a method for preparing a positive electrode material of a spindle-shaped lithium manganate hollow tube battery, which uses soluble lithium salt, divalent soluble manganese salt and potassium permanganate as raw materials, naphthalene as a template agent, and urea as a precipitating agent. After hydrothermal reaction and calcination, a spindle-shaped lithium manganate hollow tube with a length of 200‑800 nm was obtained. The present invention utilizes the easy sublimation property of naphthalene as a template agent to obtain a precursor through hydrothermal reaction, and then calcines the precursor, so that naphthalene sublimates and escapes from the lithium manganate material, and the crystallinity of lithium manganate is further improved at high temperature , and finally a spindle-shaped lithium manganate hollow tube is obtained. The spindle-shaped lithium manganate hollow tube can be used as a positive electrode material of a lithium battery to improve the specific capacity and power density of the lithium battery, and has a good application prospect.

Description

technical field [0001] The invention relates to a preparation method of a lithium manganate material, in particular to a preparation method of a spindle-shaped lithium manganate hollow tube positive electrode material. Background technique [0002] In recent years, with the rapid development of various electronic devices, the requirements for batteries are getting higher and higher, not only requiring the batteries to have a large enough capacity, but also requiring them to have small attenuation after many cycles. Among the many battery types, lithium-ion batteries are regarded as the battery with the most development potential. Moreover, lithium batteries have begun to take shape in the market, ranging from electric vehicles to notebooks and mobile phones, all of which cannot do without lithium batteries. [0003] Lithium manganate (LiMn 2 o 4 ) has become one of the most promising cathode materials for lithium-ion batteries due to its high voltage, low price, abundant ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G45/12H01M4/505H01M10/0525
CPCC01G45/1242C01P2004/04C01P2004/30C01P2004/62H01M4/505H01M10/0525H01M2004/021Y02E60/10
Inventor 郭禧斌
Owner UNIV FOR SCI & TECH ZHENGZHOU
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