A preparation method of lithium ion using inorganic perovskite derivative phase as negative electrode material

A negative electrode material, inorganic calcium technology, applied in the field of lithium ion battery negative electrode material preparation, can solve the problems of low cost, high energy density, high cost, poor cycle performance of electrodes, etc., and achieve excellent physical and chemical properties and good thermodynamic stability , suitable for large-scale production

Active Publication Date: 2018-12-21
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Abstract
  • Description
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Problems solved by technology

However, the theoretical specific capacity of graphite-based materials is low, and the discharge performance is poor under high-rate conditions.
In addition, the lithium-deintercalation potential of the graphite negative electrode is similar to the lithium potential, and it is easy to precipitate lithium to form lithium dendrites, which can cause short circuits and other shortcomings.
These aspects will restrict its application in low cost and high energy density
The lithium titanate negative electrode material has the advantages of long life, high safety, fas

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  • A preparation method of lithium ion using inorganic perovskite derivative phase as negative electrode material

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Embodiment 1

[0020] A kind of lithium ion that the present invention proposes uses the inorganic perovskite derivative phase as the preparation method of negative electrode material, comprises the following steps:

[0021] S1. Weigh a certain amount of lead bromide and cesium bromide powder, place them on the two heating devices of the vacuum system respectively, and paste the current collector copper foil on the tray above the heating device;

[0022] S2. The vacuum degree of the evaporation system is pumped to 10 -3 Pa, thermal evaporation deposition begins. First turn on the film thickness meter, and heat the burning boat (heating source) filled with cesium bromide to start monitoring the film thickness. After several hours of reaction, turn off the cesium bromide heating source, turn on the lead bromide heating source, and switch the parameters of the film thickness meter at the same time to start monitoring the lead bromide film thickness. After several hours of heating and evapora...

Embodiment 2

[0026] A kind of lithium ion that the present invention proposes uses the inorganic perovskite derivative phase as the preparation method of negative electrode material, comprises the following steps:

[0027] S1. Weigh a certain amount of lead bromide and cesium bromide powder, place them on the two heating devices of the vacuum system respectively, and paste the current collector copper foil on the tray above the heating device;

[0028] S2. The vacuum degree of the evaporation system is pumped to 10 -3 Pa, thermal evaporation deposition begins. First turn on the film thickness meter, and simultaneously heat the burning boat (heating source) containing cesium bromide and lead bromide, and start monitoring the film thickness of cesium bromide and lead bromide. After reacting for 5 hours, turn off the heating source of cesium bromide and lead bromide; the thickness of the evaporated cesium bromide is about 10 μm, and the thickness of lead bromide is about 5 μm.

[0029] S3,...

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Abstract

The invention discloses a preparation method of an inorganic perovskite derivative phase used as a negative electrode material for lithium ions, which relates to the technical fields of preparation and research of the negative electrode material of lithium ion batteries and the like. The precursor of lead bromide and cesium bromide was evaporated by vacuum thermal deposition process and depositedon the copper foil of cathode current collector. The cathode material was homogeneous and dense by subsequent heating and baking. The invention utilizes the principle of chemical solid state reactionand thermal evaporation vapor deposition, Using inorganic lead bromide and cesium bromide as raw materials, the pure inorganic perovskite materials were prepared by vacuum heating and evaporation on current collector copper foil substrate. The evaporation rate of precursor material was adjusted and the thickness and thickness ratio of the precursor material were adjusted during the reaction. Applying it to the cathode material of lithium ion battery, it exhibits good thermodynamic stability and excellent physicochemical properties, and the process is simple.

Description

technical field [0001] The invention relates to the technical field of preparation of lithium-ion battery negative electrode materials, in particular to a method for an inorganic perovskite-derived phase negative electrode material. Background technique [0002] With the rapid development of modern technology and economy, people's dependence on fossil fuels is becoming more and more serious. With the gradual depletion of fossil energy and the environmental pollution caused by their burning, the energy shortage and environmental degradation are becoming more and more serious. It has become the core issue that threatens the survival and development of human beings, and the development of new energy has become a major issue that people need to solve urgently. In recent years, with the vigorous development of renewable clean energy such as solar energy, wind energy, and nuclear energy, rechargeable batteries capable of energy conversion and storage have shown broad application p...

Claims

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Application Information

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IPC IPC(8): H01M4/04H01M4/1397H01M4/58H01M10/0525
CPCH01M4/0423H01M4/0471H01M4/1397H01M4/582H01M10/0525H01M2004/027Y02E60/10
Inventor 童国庆王双双欧阳浩淼王岷云贾成橙何里烈
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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