Unlock instant, AI-driven research and patent intelligence for your innovation.

Lithium-ion battery negative electrode material and preparation method thereof, negative electrode and lithium-ion battery

A lithium-ion battery and negative electrode material technology, applied in the field of applied chemistry, can solve the problems of low lithium-ion battery capacity, poor rate performance and cycle performance, and achieve high mechanical strength, improved cycle stability, and excellent electrochemical performance.

Active Publication Date: 2021-06-18
SHENZHEN BYD LITHIUM BATTERY
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present disclosure is to solve the problems of low capacity, poor rate performance and cycle performance of existing lithium-ion batteries, provide a lithium-ion battery negative electrode material and its preparation method, lithium-ion battery negative electrode and lithium-ion battery

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
  • Lithium-ion battery negative electrode material and preparation method thereof, negative electrode and lithium-ion battery

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0045] The method for preparing the negative electrode of the lithium ion battery of the present disclosure may include the following steps: uniformly mixing the negative electrode material, the conductive agent and the first binder in the first solvent to obtain the negative electrode slurry; coating the negative electrode slurry on the negative electrode current collector Above, the lithium battery negative electrode A containing the negative electrode material of the present disclosure is obtained after drying at 50-150° C. and tableting treatment at 0.5-3 MPa.

[0046] A fifth aspect of the present disclosure provides a lithium ion battery including a positive electrode, a negative electrode and an electrolyte. The structure of the lithium battery is not particularly required, and may be one of an all-solid-state battery, a quasi-solid-state battery and a liquid lithium battery, preferably a liquid lithium battery, for example, may include a positive electrode, a negative e...

Embodiment 1

[0057] (1) Preparation of positive electrode C of lithium battery

[0058] 930g of LiCoO 2 Anode material (93%), 30g binder PVDF (3%), 20g acetylene black (2%), 20g conductive agent carbon fiber (2%) join in the 800g solvent NMP (nitrogen methyl pyrrolidone), and in vacuum mixer Stir in medium to form a stable and uniform positive electrode slurry. The positive electrode slurry is evenly and intermittently coated on both sides of aluminum foil (aluminum foil size: width 160mm, thickness 16μm), then dried at 393K, pressed by a roller press with a pressure of 1.5MPa, and cut into size It is a lithium battery positive electrode C of 480mm (length) × 45mm (width).

[0059] (2) Preparation of lithium battery negative electrode A

[0060] Production of negative electrode materials with core-shell structure: 1020g of TiO 2 , 11g of lithium ethoxide was added to 100mL of ethanol, stirring was started, and then the cloudy liquid was evaporated to dryness, wherein, TiO 2 The averag...

Embodiment 2

[0066] (1) Preparation of positive electrode C of lithium battery

[0067] 930g of LiCoO 2 Anode material (93%), 30g binder PVDF (3%), 20g acetylene black (2%), 20g conductive agent carbon fiber (2%) join in the 800g solvent NMP (nitrogen methyl pyrrolidone), and in vacuum mixer Stir in medium to form a stable and uniform positive electrode slurry. The positive electrode slurry is evenly and intermittently coated on both sides of aluminum foil (aluminum foil size: width 160mm, thickness 16μm), then dried at 393K, pressed by a roller press with a pressure of 1.5MPa, and cut into size It is a lithium battery positive electrode C of 480mm (length) × 45mm (width).

[0068] (2) Preparation of lithium battery negative electrode A

[0069] Production of negative electrode materials with core-shell structure: 1000g of TiO 2 , 5g Ti(BH 4 ) 2 , 3.1g of lithium ethoxide was added to 25mL of octadecene, stirring was started, and then the cloudy liquid was evaporated to dryness, wher...

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

PropertyMeasurementUnit
thicknessaaaaaaaaaa
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The present disclosure relates to a lithium-ion battery negative electrode material. The particles of the negative electrode material have a core-shell structure. The particles of the negative electrode material have a core-shell structure. The core-shell structure includes an inner core, an intermediate shell layer and an outer shell layer. TiO 2 , the intermediate shell contains Li 4 Ti 5 o 12 , the outer shell layer contains TiOF 2 . Applying the lithium-ion battery anode material provided by the present disclosure to a lithium-ion battery can significantly improve the rate performance, cycle performance and battery capacity of the lithium-ion battery.

Description

technical field [0001] The disclosure relates to the field of applied chemistry, in particular, to a lithium-ion battery negative electrode material and a preparation method thereof, a lithium-ion battery negative electrode and a lithium-ion battery. Background technique [0002] Lithium-ion battery anode materials have an important impact on the performance of lithium-ion batteries, and coating and modifying lithium-ion battery anode materials is an effective means to improve their electrochemical performance. [0003] TiO2 is used in the patent application CN102208612A 2 Coated Li 4 Ti 5 o 12 Lithium battery anode composite materials were prepared by the method, although the rate performance and cycle stability of lithium batteries prepared by this method have been improved to a certain extent, but the lithium ion battery anode materials prepared by this method have limited improvement in the capacity of lithium ion batteries; patent Application CN104425808A discloses ...

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 Patents(China)
IPC IPC(8): H01M4/36H01M4/48H01M4/485H01M4/62H01M4/131H01M10/0525
CPCH01M4/131H01M4/366H01M4/48H01M4/485H01M4/624H01M10/0525Y02E60/10
Inventor 历彪郭姿珠易观贵
Owner SHENZHEN BYD LITHIUM BATTERY
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com