Preparation method for cathode material of lithium ion battery

A lithium-ion battery and cathode material technology, which is applied in battery electrodes, circuits, electrical components, etc., can solve problems such as difficulty in reaching high temperature, and achieve the effect of low furnace temperature and low energy consumption

Inactive Publication Date: 2018-01-19
BEIJING INSTITUTE OF TECHNOLOGYGY
View PDF9 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that it is difficult to achieve the required high temperature in the sintering process of the existing preparation of lithium-ion battery positive electrode materials, and to provide a method for preparing lithium-ion battery positive electrode materials at a lower furnace temperature

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method for cathode material of lithium ion battery
  • Preparation method for cathode material of lithium ion battery
  • Preparation method for cathode material of lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] By LiCoO 2 The stoichiometric ratio of the (LCO) molecular formula weighs Li 2 CO 3 、Co 2 o 3 , add ethanol, ball mill for 10 hours, and dry to obtain the LCO positive electrode material precursor powder, grind evenly, put it into a mold after drying, and press it, and apply an electric field to the precursor powder through the wires at both ends of the mold after pressing. The mold was then placed in a tube furnace at 5 °C min -1 The heating rate is to raise the furnace temperature from room temperature to 230°C, and when the temperature rises to 230°C, the temperature is constant, and 70V cm is applied to the LCO cathode material precursor through a constant external power supply. -1 The electric field is used for current-assisted high-temperature synthesis, and the current will change rapidly; the control current rises to 27mA mm -2 , maintain furnace temperature and at 27mA mm -2 Sintering under constant current for 2h, then cutting off the circuit and cooling...

Embodiment 2

[0030] Press LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 (LNCMO) The stoichiometric ratio of the molecular formula weighs Li 2 CO 3 、NiCO 3 , CoO, MnO, add ethanol, ball mill for 10 hours, and dry to obtain LNCMO cathode material precursor powder, grind evenly, put it into a mold after drying, and press it, after pressing, apply an electric field to the precursor powder through the wires at both ends of the mold . The mold was then placed in a tube furnace at 5 °C min -1 The heating rate is to raise the furnace temperature from room temperature to 300°C. When the temperature rises to 300°C, the temperature is kept constant, and 70V cm is applied to the LNCMO cathode material precursor through a constant external power supply. -1 The field strength of the current-assisted high-temperature synthesis is carried out, and the current will change rapidly at the same time; the control current rises to 27mA mm -2 , maintain furnace temperature and at 27mA mm -2 Sintering at a constant current...

Embodiment 3

[0032] by LiFePO 4 The stoichiometric ratio of (LFPO) molecular formula weighs Li 2 CO 3 , FeC 2 o 4 , NH 4 h 2 PO 4 , add ethanol, ball mill for 10 hours, and dry to obtain LFPO positive electrode material precursor powder, grind evenly, put it into a mold after drying, and press it, and apply an electric field to the precursor powder through the wires at both ends of the mold after pressing. The mold was then placed in a tube furnace at 5 °C min -1 The heating rate is to raise the furnace temperature from room temperature to 380°C. When the temperature rises to 380°C, the temperature is constant, and 100V cm is applied to the LFPO cathode material precursor through a constant external power supply. -1 The field strength of the current-assisted high-temperature synthesis is carried out, and the current will change rapidly at the same time; the control current rises to 27mA mm -2 , maintain furnace temperature and at 27mA mm -2 Under constant current sintering for 2h,...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a preparation method for a cathode material by supplementing with current. The current is supplemented in the sintering process, so that the cathode material of a lithium ionbattery is acquired under the temperature lower than the conventional sintering temperature. The method can be widely applied to the preparation for the cathode materials of various lithium ion batteries. The furnace temperature (200-1000 DEG C) and energy consumption required by the cathode material prepared according to the invention are low.

Description

technical field [0001] The invention relates to a preparation method of a positive electrode material of a lithium ion battery, belonging to the field of lithium ion batteries. Background technique [0002] Lithium-ion battery is a new type of high-energy green secondary battery. It has the advantages of high capacity, high voltage, long cycle life, and good safety. It has been widely used in various fields such as portable electronic equipment, electric vehicles, space technology, and national defense industry. usage of. Lithium-ion batteries are composed of positive electrodes, negative electrodes, separators, positive electrode materials, current collectors, etc. The battery reaction is: During charging, Li + From the positive electrode, an electron is released, and the transition metal ion is oxidized at the same time, Li + After the positive electrode material reaches the negative electrode, the negative electrode material is embedded, and the electrons flow from the...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/505H01M4/525
CPCY02E60/10
Inventor 王振华孙克宁谢理强冯金生
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap