Method of preparing NiO-coated lithium titanate composite anode material

A technology for coating lithium titanate and negative electrode materials, applied in the field of negative electrode materials, can solve problems such as complex process steps, and achieve the effects of simple process, fast reaction and short reaction time

Inactive Publication Date: 2018-08-03
FUJIAN XFH NEW ENERGY MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The above method has complicated process steps

Method used

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  • Method of preparing NiO-coated lithium titanate composite anode material
  • Method of preparing NiO-coated lithium titanate composite anode material
  • Method of preparing NiO-coated lithium titanate composite anode material

Examples

Experimental program
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Effect test

Embodiment 1

[0025] A method for preparing a NiO-coated lithium titanate composite negative electrode material adopts high-temperature solid-phase synthesis, and the steps are: weighing 8 g of potassium carbonate and titanium dioxide according to a certain stoichiometric ratio and placing them in a 300 mL crucible, and then putting Preheat the muffle furnace at room temperature to 800°C at 5°C / min, keep the temperature at 800°C for 4 hours, heat the reaction for 4 hours, take out the crucible directly from the muffle furnace and place it in the air to cool to room temperature to obtain nano titanic acid Lithium, and then adding 2.8% by mass percentage of nano-nickel oxide.

[0026] Wherein, the nano-NiO is prepared by a molten salt combustion method. Nickel acetate is weighed, and the nickel acetate is put into a room temperature muffle furnace with a heating rate of 5° / min. Remove after time and cool at room temperature.

[0027] figure 1 It is the X-ray diffraction pattern of the NiO c...

Embodiment 2

[0031] A method for preparing a NiO-coated lithium titanate composite negative electrode material adopts high-temperature solid-phase synthesis, and the steps are: weighing 7 g of potassium carbonate and titanium dioxide according to a certain stoichiometric ratio and placing them in a 300 mL crucible, and then putting Preheat the muffle furnace at room temperature to 800°C at 5°C / min, keep the temperature at 800°C for 1 hour, heat the reaction for 1 hour, take out the crucible directly from the muffle furnace and place it in the air to cool to room temperature to obtain nano titanic acid Lithium, and then add 0.5% by mass percentage of nano-nickel oxide.

[0032] Wherein, the nano-NiO is prepared by a molten salt combustion method. Nickel acetate is weighed, and the nickel acetate is placed in a muffle furnace at room temperature. The heating rate is 5° / min. Remove after time and cool at room temperature.

[0033] After testing, the NiO-coated lithium titanate composite nega...

Embodiment 3

[0035] A method for preparing a NiO-coated lithium titanate composite negative electrode material adopts high-temperature solid-phase synthesis, and the steps are: weighing 6 g of potassium carbonate and titanium dioxide according to a certain stoichiometric ratio and placing them in a 300 mL crucible, and then putting Preheat the muffle furnace at room temperature to 800°C at 5°C / min, keep the temperature at 800°C for 8 hours, heat the reaction for 8 hours, take out the crucible directly from the muffle furnace and place it in the air to cool to room temperature to obtain nano titanic acid Lithium, and then add 1.2% nano-nickel oxide in mass percentage.

[0036] Wherein, the nano-NiO is prepared by a molten salt combustion method, and nickel acetate is weighed, and the nickel acetate is put into a room temperature muffle furnace, and the heating rate is 5° / min, and the temperature is kept at a predetermined temperature of 700°C for 4 hours; Remove after time and cool at room ...

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Abstract

The invention discloses a method of preparing an NiO-coated lithium titanate composite anode material. The method adopts high-temperature solid-phase synthesis and comprises the following steps of weighing potassium carbonate and titanium dioxide, putting the weighed materials in a room-temperature muffle furnace with a temperature rising speed being 5 degrees / min, and performing constant temperature heat preservation for 1-8h at a preset temperature of 800 DEG C; taking out the material after a preset time of heat preservation, and performing cooling at room temperature; and then adding nanometer NiO with the mass percentage being 0.5-3 percent. By adopting the method provided by the invention, lithium titanate is synthesized by utilizing a high-temperature solid-phase method, and the high-temperature solid-phase method has the main advantages of short reaction time, simpleness in technology, easiness in realizing industrial large-scale production and rapidness in combustion syntheticreaction, can obtain a product with an intact crystal within a shorter time and is suitable for batch production of the lithium titanate; and in addition, by adopting nickel oxide to coat the lithiumtitanate, the charge capacity of the lithium titanate is improved.

Description

technical field [0001] The invention relates to the technology in the field of negative electrode materials, in particular to a method for preparing a NiO-coated lithium titanate composite negative electrode material. Background technique [0002] With the rapid development of emerging economies, global energy consumption has increased dramatically. Lithium-ion batteries have been widely used in portable electronic devices such as computers, cameras, and mobile phones due to their high voltage, high energy density, long cycle life, good safety performance, and low cost. In recent years, countries around the world are actively carrying out research on the application of lithium-ion batteries to hybrid electric vehicles (HEV), pure electric vehicles (PEV), etc., but the main bottleneck of lithium-ion batteries as vehicle power batteries is the negative electrode materials of lithium-ion batteries. performance. [0003] Spinel-type lithium titanate has high structural stabili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/485H01M4/62H01M10/0525B82Y30/00
CPCB82Y30/00H01M4/366H01M4/485H01M4/62H01M10/0525H01M2004/021H01M2004/027Y02E60/10
Inventor 黄技军赵东辉周鹏伟
Owner FUJIAN XFH NEW ENERGY MATERIALS CO LTD
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