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Electrode material for high-temperature electrolyte and preparation method of electrode material

A technology of electrode materials and electrolytes, applied in the field of electrolytes, can solve the problems of high freezing point of solvents, low electrical conductivity, and small low-temperature capacity, etc., and achieve the effects of wide application value, simple preparation method, and excellent performance

Active Publication Date: 2020-11-06
KELAS ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the most widely used electrolyte system in commercialization is the mixed carbonate solution of lithium hexafluorophosphate. The solute in this system will decompose at high temperature and is sensitive to water. The performance decays rapidly and it is difficult to use at high temperature; the freezing point of the solvent of the electrolyte is high, the conductivity is low at low temperature, and the capacity at low temperature is small
Aiming at the deficiencies of the existing electrolyte system, we generally start from the three aspects of solute, solvent and additives, and look for lithium salts that can replace lithium hexafluorophosphate to improve the high-temperature performance of the battery. However, there are few improvements in electrode materials to improve the electrolyte. High temperature performance research

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Synthesis of Ni by solid-state reaction method 0.9 TiO 3 : Weigh 3.5941g NiO (analytical pure), 3.734gTiO with electronic balance 2 (analytical pure). Put the above materials into a ball mill tank, add acetone dispersant, about 2 / 3 of the volume of the ball mill tank, then add balls, and mill for 20 minutes in a ball mill with a rotating speed of 1000r / min to make them evenly mixed. Dry the uniformly mixed slurry at 100°C for half an hour, raise the temperature of the dried powder to 1300°C in a high temperature furnace at a rate of 3°C / min, keep this temperature for calcination for 8 hours, and cool naturally to room temperature to obtain Ni 0.9 TiO 3 .

[0029] (2) Take 30 parts of α-type manganese dioxide nanomaterials, 20 parts of graphene oxide and Ni 0.9 TiO 3 50 parts were put into a ball mill with absolute ethanol as solvent and high-purity zirconia balls as grinding medium, ball milled for 18 hours, dried and sieved to obtain mixed powder.

[0030] ...

Embodiment 2

[0032] (1) Synthesis of Ni by solid-state reaction method 0.9 TiO 3 : Weigh 3.5941g NiO (analytical pure), 3.734gTiO with electronic balance 2 (analytical pure). Put the above materials into a ball mill tank, add acetone dispersant, about 2 / 3 of the volume of the ball mill tank, then add balls, and mill for 20 minutes in a ball mill with a rotating speed of 1000r / min to make them evenly mixed. Dry the uniformly mixed slurry at 100°C for half an hour, raise the temperature of the dried powder to 1200°C in a high-temperature furnace at a rate of 3°C / min, keep this temperature for 9 hours, and cool naturally to room temperature to obtain Ni 0.9 TiO 3 .

[0033] (2) Take 30 parts of α-manganese dioxide nanomaterials, 10 parts of graphene oxide and Ni 0.9 TiO 3 60 parts were added to a ball mill with anhydrous ethanol as a solvent and high-purity zirconia balls as a grinding medium, ball milled for 24 hours, dried and sieved to obtain a mixed powder.

[0034] (3) The mixed ...

Embodiment 3

[0036] (1) Synthesis of Ni by solid-state reaction method 0.9 TiO 3 : Weigh 3.5941g NiO (analytical pure), 3.734gTiO with electronic balance 2 (analytical pure). Put the above materials into a ball mill tank, add acetone dispersant, about 2 / 3 of the volume of the ball mill tank, then add balls, and mill for 20 minutes in a ball mill with a rotating speed of 1000r / min to make them evenly mixed. Dry the uniformly mixed slurry at 100°C for half an hour, raise the temperature of the dried powder to 1200°C in a high-temperature furnace at a rate of 3°C / min, keep this temperature for calcination for 8 hours, and cool naturally to room temperature to obtain Ni 0.9 TiO 3 .

[0037] (2) Take 40 parts of α-type manganese dioxide nanomaterials, 20 parts of graphene oxide and Ni 0.9 TiO 340 parts were added to a ball mill with absolute ethanol as a solvent and high-purity zirconia balls as a grinding medium, ball milled for 24 hours, dried and sieved to obtain a mixed powder.

[0...

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Abstract

The invention discloses an electrode material for a high-temperature electrolyte. The electrode material is prepared from the following raw materials in percentage by weight: 30 to 40 percent of alpha-type manganese dioxide nano material, 10 to 20 percent of graphene oxide and 30 to 60 percent of Ni0. 9TiO3. The invention further discloses a method for preparing the electrode material for the high-temperature electrolyte. The method comprises the following steps: (1) synthesizing Ni0. 9TiO3 by adopting a solid-phase reaction method; (2) weighing the alpha-type manganese dioxide nano material,graphene oxide and Ni0. 9TiO3 according to a ratio, adding the weighed materials into a ball mill for ball milling, and performing drying and sieving to obtain mixed powder; and (3) calcining the mixed powder, keeping the temperature, and cooling to room temperature to obtain the electrode material for the high-temperature electrolyte. The preparation method is simple and easy to operate, and theobtained electrode material is stable in performance and good in conductivity.

Description

technical field [0001] The invention belongs to the technical field of electrolytes, and in particular relates to an electrode material for high-temperature electrolytes and a preparation method thereof. Background technique [0002] In recent years, my country's power battery industry is changing with each passing day, and the technical route is showing a trend of diversification. Since the electrolyte is a formulated product, its compatibility with downstream customers is very important. Therefore, an important feature of the electrolyte product is customization, which needs to be based on the type of positive electrode material, battery shape, and battery performance (such as temperature range, etc.) of the lithium battery. ) to finally determine the formulation of the electrolyte. [0003] It is precisely because of this feature that the research and development of the electrolyte must closely follow the development trend of battery technology. Looking at the power bat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/485H01M4/505H01M4/525H01M4/62H01M10/0525
CPCH01M4/485H01M4/505H01M4/525H01M4/625H01M10/0525Y02E60/10
Inventor 石俊峰秦建
Owner KELAS ENVIRONMENTAL PROTECTION TECH CO LTD
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