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Preparation method of spinel lithium manganate

A type of lithium manganate and spinel technology, applied in the field of preparation of spinel type lithium manganate, can solve the problems of slow reaction rate and high energy consumption, and achieve the effects of low cost, reduced energy consumption and shortened reaction time

Inactive Publication Date: 2018-02-27
YUNNAN MINZU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] It can be seen from the above patent application that the reaction rate of the original liquid phase flameless combustion method is relatively slow through muffle furnace heating, the heating time is as long as more than 1 hour, and the energy consumption is relatively high.

Method used

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  • Preparation method of spinel lithium manganate
  • Preparation method of spinel lithium manganate
  • Preparation method of spinel lithium manganate

Examples

Experimental program
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Effect test

Embodiment 1

[0052] The implementation steps of this embodiment are as follows: according to the molar ratio of lithium and manganese 1:1.8, the Mn(AC) 2 4H 2 O and LiNO 3 Put it into an alumina crucible and mix evenly to obtain a mixture, then add concentrated nitric acid and deionized water to the mixture, and mix well to make the NO in the entire reaction system 3 - with Ac - The molar ratio is 1:0.67; then let the reaction system be heated at a temperature of 104°C for 15 minutes in a blast drying oven sold by Shanghai Yiheng Scientific Instrument Co., Ltd. under the trade name electric blast drying oven, during the heating process Stir and mix evenly in the medium, and then in the microwave oven sold by Galanz under the brand name Galanz frequency conversion, the microwave power is 360W and the microwave power density is 130W / m 2 Treated under the conditions for 20 minutes, the gray-black porous porous sample was obtained, and it was determined according to the X-ray diffraction a...

Embodiment 2

[0055] The implementation steps of this embodiment are as follows: according to the molar ratio of lithium and manganese 1:2.2, the Mn(AC) 2 4H 2 O and LiNO 3 Put it into an alumina crucible and mix evenly to obtain a mixture, then add concentrated nitric acid and deionized water to the mixture, and mix well to make the NO in the entire reaction system 3 - with Ac - The molar ratio is 1:1.90; then let the reaction system be heated at a temperature of 106° C. for 20 minutes in a blast drying oven sold by Shanghai Yiheng Scientific Instrument Co., Ltd. under the trade name electric blast drying oven. Stir and mix evenly in the medium, and then in the microwave oven sold by Galanz Company under the brand name Galanz Inverter Microwave Oven, microwave power 900W and microwave power density 200W / m 2 Treated under the conditions for 10 minutes, the gray-black porous porous sample was obtained, and it was determined according to the X-ray diffraction analysis described in this sp...

Embodiment 3

[0058] The implementation steps of this embodiment are as follows: according to the molar ratio of lithium and manganese 1:2.0, the Mn(AC) 2 4H 2 O and LiNO 3 Put it into an alumina crucible and mix evenly to obtain a mixture, then add concentrated nitric acid and deionized water to the mixture, and mix well to make the NO in the entire reaction system 3 - with Ac - The molar ratio was 1:0.90; then the reaction system was heated at a temperature of 102°C for 16 minutes in a blast drying oven sold by Shanghai Yiheng Scientific Instrument Co., Ltd. under the trade name Electric Blast Drying Oven. Stir and mix evenly in the medium, and then in the microwave oven sold by Galanz Company under the brand name Galanz Inverter Microwave Oven, microwave power 540W and microwave power density 90W / m 2 Treated under the conditions for 30 minutes, the gray-black porous porous sample was obtained, and it was determined according to the X-ray diffraction analysis described in this specifi...

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Abstract

The invention relates to a preparation method of spinel lithium manganate. The preparation method comprises the following steps: uniformly mixing lithium or manganese acetate or nitrate, then heatingunder the temperature of 102-108 DEG C, and treating for 5-30 minutes in a microwave oven under microwave power of 360-900W and microwave power density of 90-250W / m<2> to obtain spinel lithium manganate. Through application of the inside heating characteristic of microwave heating, the whole system reaches the ignition temperature simultaneously; the system rapidly carries out spontaneous combustion to release high heat; lithium manganate can be rapidly crystallized and shaped by means of the heat released by the combustion reaction; through microwave heating, the reaction time is greatly reduced, and a large amount of energy consumption is reduced; meanwhile, the method is simple in process and low in cost, is suitable for popularization, and can achieve efficient industrial mass production of lithium manganate.

Description

technical field [0001] The invention belongs to the technical field of high-energy batteries. More specifically, the present invention relates to a preparation method of spinel lithium manganese oxide. Background technique [0002] Lithium-ion batteries have the advantages of high specific energy and low environmental pollution, and are widely used in mobile phones, portable computers, cameras and other equipment. The study of the positive electrode material is the focus of the lithium-ion battery research work. Currently commercially available lithium-ion batteries mainly use LiCoO 2 As a cathode material, but cobalt is relatively expensive and toxic, the battery industry has been working hard to find an alternative to LiCoO 2 s material. LiMn 2 o 4 It is cheap, green and non-toxic, and has excellent electrochemical performance, so all countries in the world are vigorously carrying out LiMn 2 o 4 Practical research on lithium-ion batteries with cathode materials. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/12H01M4/505
CPCC01G45/1214C01P2002/32C01P2002/72C01P2004/03C01P2006/40H01M4/505Y02E60/10
Inventor 苏长伟田亮王艳温碧霞郭俊明
Owner YUNNAN MINZU UNIV
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