Preparation method of lithium-enriched anode material with nano-grade lamellar-spinel composite structure

A lithium-rich positive electrode material and composite structure technology, applied in structural parts, battery electrodes, electrical components, etc., can solve the problems that have not yet been discovered in papers or patents on nano-scale lithium-rich layered-spinel composite structures, and achieve easy control , good reproducibility and simple process

Inactive Publication Date: 2013-09-18
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

No papers or patents have been found on the synthesis of cathode materials with

Method used

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  • Preparation method of lithium-enriched anode material with nano-grade lamellar-spinel composite structure
  • Preparation method of lithium-enriched anode material with nano-grade lamellar-spinel composite structure
  • Preparation method of lithium-enriched anode material with nano-grade lamellar-spinel composite structure

Examples

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Embodiment 1

[0022] Weigh 2.028 g of manganese sulfate, 1.052 g of nickel sulfate, and 2.738 g of ammonium persulfate, dissolve them in 30 ml of deionized water, and seal and stir at room temperature for 2 hours at a stirring speed of 200 rpm to obtain a uniform mixed solution; Weigh LiOH·H 2 5.37 g of O was dissolved in 40 ml of deionized water, sealed and stirred at room temperature for 3 h to prepare a lithium hydroxide solution. Measure 20 ml of lithium hydroxide solution and 15 ml of mixed solution, mix the two solutions evenly, and seal and stir at room temperature for 2 hours to obtain a precursor mixture. The precursor mixture was moved to the reaction kettle and reacted at 180°C for 10 hours. After the reaction was completed, it was cooled with water and filtered through a filter membrane. The filter cake was dried at 80°C for 6 hours and ground to obtain brown-black powder. Weigh 0.5 grams of brown-black powder and spread it evenly on the bottom of the corundum ark. Place the cor...

Embodiment 2

[0025] Weigh 2.028 g of manganese sulfate, 1.052 g of nickel sulfate, and 2.738 g of ammonium persulfate, dissolve them in 30 ml of deionized water, and seal and stir at room temperature for 2 hours at a stirring speed of 200 rpm to obtain a uniform mixed solution; Weigh LiOH·H 2O 5.37g was dissolved in 40ml of deionized water, and stirred at room temperature for 3h to prepare a lithium hydroxide solution. Measure 20ml of lithium hydroxide solution and 15ml of the mixed solution, mix the two solutions evenly, and seal and stir at room temperature for 2h to obtain the precursor mixed solution. Move the precursor mixture to the reaction kettle, react at a temperature of 180°C for 10 hours, after the reaction is completed, cool with water and filter through a filter, dry the filter cake at a temperature of 80°C for 6 hours, and grind to obtain a brown-black powder. Weigh 0.5 g of brown-black powder and evenly spread it on the bottom of the corundum ark, place the corundum ark in ...

Embodiment 3

[0027] Weigh 2.028g of manganese sulfate, 1.052g of nickel sulfate, and 2.738g of ammonium persulfate, dissolve them in 30ml of deionized water, and stir at room temperature for 2 hours with a stirring speed of 200 rpm to obtain a uniform mixed solution; weigh LiOH·H 2 O 5.37g was dissolved in 40ml of deionized water, and stirred at room temperature for 3h to prepare a lithium hydroxide solution. Measure 20ml of lithium hydroxide solution and 15ml of the mixed solution, mix the two solutions evenly, and seal and stir at room temperature for 2h to obtain the precursor mixed solution. Move the precursor mixture to the reaction kettle, and react at 200°C for 10 hours. After the reaction, cool with water and filter through a filter, dry the filter cake at 80°C for 6 hours, and grind to obtain a brown-black powder. Weigh 0.5 g of brown-black powder and evenly spread it on the bottom of the corundum ark, place the corundum ark in the constant temperature zone of the tube furnace, ra...

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Abstract

The invention discloses a preparation method of a lithium-enriched anode material with a nano-grade lamellar-spinel composite structure. The molecular formula of the lithium-enriched anode material with the nano-grade lamellar-spinel composite structure is X(Li2MnO3.LiMn0.5Ni0.5O2)-YLiMn1.5Ni0.5O4; a preparation process comprises the following steps of: preparing a mixed solution of manganese sulfate, nickel sulfate and ammonium persulfate and a lithium hydroxide solution; mixing the two solutions according to a volume ratio to prepare a mixed solution of a precursor; adding the mixed solution of the precursor into a hydrothermal reaction kettle to react; calcining and grinding to prepare the lithium-enriched anode material with the nano-grade lamellar-spinel composite structure. Compared with a co-precipitation method, the preparation method disclosed by the invention has the characteristics of simple process, easiness of controlling, low cost, environmental friendliness and better repeatability, and is more suitable for large-scale production. The lithium-enriched anode material with the nano-grade lamellar-spinel composite structure prepared by the method disclosed by the invention is small in grain diameter, and has good electrochemical performances.

Description

technical field [0001] The invention relates to a method for preparing a lithium-rich cathode material with a nanoscale layered-spinel composite structure, which belongs to the preparation technology for the cathode material of a lithium ion battery. Background technique [0002] At present, the requirements for environmental protection and sustainable development in countries around the world are constantly increasing, and the electric vehicle industry is showing a trend of vigorous development. As an advanced green, high-energy and environment-friendly secondary battery in the 21st century, lithium-ion batteries have been widely used in portable devices such as mobile phones and notebook computers. The good electrochemical properties of lithium-ion batteries make them expected to be used in electric vehicles . However, the current lithium-ion battery cathode material has a low discharge capacity (<200mAh / g), which cannot meet the battery requirements of the electric ve...

Claims

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Application Information

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IPC IPC(8): H01M4/505H01M4/525
CPCY02E60/10
Inventor 师春生刘聪赵乃勤刘恩佐何春年
Owner TIANJIN UNIV
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