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Layered ternary cathode material of lithium ion battery and microwave preparation method of layered ternary cathode material

A lithium-ion battery and cathode material technology, applied in battery electrodes, electrical components, secondary batteries, etc., can solve problems such as poor anti-overcharge ability, large environmental pollution, and poor cycle performance, and achieve fast response and low equipment requirements. High, small particle size effect

Inactive Publication Date: 2015-11-25
HUBEI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a novel lithium-ion battery layered ternary cathode material for the problems of high production cost, high environmental pollution, poor overcharge resistance, poor cycle performance, and low capacity of the existing lithium-ion positive electrode materials. and its microwave preparation method

Method used

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  • Layered ternary cathode material of lithium ion battery and microwave preparation method of layered ternary cathode material
  • Layered ternary cathode material of lithium ion battery and microwave preparation method of layered ternary cathode material
  • Layered ternary cathode material of lithium ion battery and microwave preparation method of layered ternary cathode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] First weigh 3mol of lithium acetate, 1mol of nickel acetate, 1mol of cobalt acetate, 1mol of butyl titanate and 6mol of citric acid, add 2ml of water, grind for 10 minutes and mix well, then put the mixture in a crucible and put it in a household microwave oven, and set it on medium-high heat Heating under the gear for 10 minutes, taking it out after natural cooling, and grinding to obtain a black layered ternary cathode material LiNi with a particle size of 200-500nm 1 / 3 co 1 / 3 Ti 1 / 3 o 2， The household microwave oven used in this embodiment is a Galanz brand WD900SL23-2 microwave oven.

[0023] see figure 1 , figure 1 It is the layered ternary cathode material LiNi prepared in this embodiment. 1 / 3 co 1 / 3 Ti 1 / 3 o 2 The X-ray diffraction pattern. Depend on figure 1 It can be seen that the phase obtained in this example is a typical α-NaFeO 2 Hexagonal layered structure without any miscellaneous peaks appearing. The sharp peak shape indicated that the result...

Embodiment 2

[0029] First weigh 3mol of lithium acetate, 1mol of nickel acetate, 1mol of cobalt acetate, 1mol of butyl titanate and 6mol of citric acid, add 2ml of water and grind for 15 minutes to mix evenly, then put the mixture in a crucible and put it in a household microwave oven. Heating under the gear for 20 minutes, taking it out after natural cooling and grinding to obtain a black layered ternary cathode material LiNi with a particle size of 200-500nm 1 / 3 co 1 / 3 Ti 1 / 3 o 2， The household microwave oven used in this embodiment is a Galanz brand WD900SL23-2 microwave oven.

[0030] The layered ternary positive electrode material prepared in this example was subjected to X-ray diffraction, electron microscope scanning, and charge-discharge tests, and the spectra obtained were almost the same as those obtained in Example 1.

Embodiment 3

[0032] First weigh 3mol of lithium acetate, 1mol of nickel acetate, 1mol of cobalt acetate, 1mol of butyl titanate and 6mol of citric acid, add 2ml of water, grind for 10 minutes and mix well, then put the mixture in a crucible and put it in a household microwave oven, and set it on medium-high heat Heating under the gear for 30 minutes, taking it out after natural cooling, and grinding to obtain a black layered ternary cathode material LiNi with a particle size of 200-500nm 1 / 3 co 1 / 3 Ti 1 / 3 o 2， The household microwave oven used in this embodiment is a Galanz brand WD900SL23-2 microwave oven.

[0033] The layered ternary positive electrode material prepared in this example was subjected to X-ray diffraction, electron microscope scanning, and charge-discharge tests, and the spectra obtained were almost the same as those obtained in Example 1.

[0034] As can be seen from Examples 1-3, under the premise that the metering ratio is the same and the selected raw materials are ...

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Abstract

The invention discloses a layered ternary cathode material of a lithium ion battery and a microwave preparation method of the layered ternary cathode material. The chemical formula of the layered ternary cathode material of the lithium ion battery is Li<x>Ni<y>Co<z>Ti<1-y-z>O<2>, wherein x is more than or equal to 1.0 and less than or equal to 1.2, y is more than 0 and less than or equal to 0.6, z is more than 0 and less than or equal to 0.4, and (1-y-z) is more than 0. The microwave preparation of the layered ternary cathode material comprises the following steps of firstly, sequentially weighing a lithium salt, a divalent nickel salt, a trivalent cobalt salt and a tetravalent titanium salt according to a mole rate and placing the above salts into a mortar; secondly, adding an appropriate amount of a chelating agent and a grinding agent and grinding to prepare a mixture solution; and finally, placing the mixture solution in a crucible, placing the crucible in a microwave oven and heating for 10 to 40 minutes, naturally cooling, taking out and grinding, thereby obtaining the layered ternary cathode material. The layered ternary cathode material is high in product capacity retention ratio and high in cyclic stability; and the method has the advantages of simplicity and feasibility in process, availability in raw material, high response, low requirement for a device and low pollution, and the process parameter in the reaction process is simple and controllable.

Description

technical field [0001] The invention relates to a lithium ion battery cathode material, in particular to a lithium ion battery layered ternary cathode material and a microwave preparation method thereof. Background technique [0002] At present, the green power battery integrating energy saving, environmental protection and recyclability is a focus of research on renewable and clean energy for human beings, and the positive electrode material is one of the key technologies of power batteries. Lithium-ion batteries are favored because of their high voltage, high energy density, long cycle life, and low environmental pollution. However, with the rapid development of electronic information technology, higher requirements are placed on the performance of lithium-ion batteries. Cathode material is currently the most critical material in lithium-ion batteries, and its development is also the most worthy of attention. [0003] At present, the common cathode materials for lithium-i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/525H01M4/485H01M10/0525
CPCH01M4/485H01M4/525H01M10/0525Y02E60/10
Inventor 程翠霞
Owner HUBEI NORMAL UNIV
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