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

Lithium secondary battery based on Li2O-containing positive electrode and active-substance-free negative electrode and preparation method

A lithium secondary battery, inactive technology, applied in the field of electrochemistry, can solve problems such as hindering the effective utilization of lithium metal batteries, difficulty in practical application, restricting the production and preparation of lithium metal batteries, etc. and the effect of specific energy

Active Publication Date: 2021-09-07
NANJING UNIV
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the active chemical properties of lithium metal, there are many safety hazards in the production and use of lithium metal batteries, which restricts the production and preparation of lithium metal batteries on the one hand, and hinders the effective use of lithium metal batteries on the other hand. , making it difficult to implement

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 secondary battery based on Li2O-containing positive electrode and active-substance-free negative electrode and preparation method
  • Lithium secondary battery based on Li2O-containing positive electrode and active-substance-free negative electrode and preparation method
  • Lithium secondary battery based on Li2O-containing positive electrode and active-substance-free negative electrode and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The following method was used to prepare the Li-based 2 Lithium secondary battery with O positive electrode and negative electrode without active material:

[0031] S1. Preparation of cathode material lithium oxide

[0032] Lithium oxide thermally decomposes lithium peroxide Li 2 o 2 get. First, lithium peroxide Li 2 o 2 The powder is transferred to the inside of the tube furnace cavity, and the argon Ar protection gas is quickly introduced at room temperature to avoid its contact with air and deterioration. After feeding argon gas Ar for 5 hours, the tube furnace was heated up (heating rate: 10 degrees per minute), and kept at 350 degrees for 5 hours. Afterwards, the heating was stopped and allowed to cool with the furnace. After the temperature of the powder reaches room temperature, the sample is placed in the transfer chamber and transferred to an argon Ar glove box for storage. During the whole process, the effects of deterioration and other effects caused ...

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 discloses a lithium secondary battery based on a positive electrode containing Li2O and a negative electrode without active substances and a preparation method thereof. A positive electrode material of the lithium secondary battery comprises lithium oxide with the weight content of 1-30wt%, a negative electrode material is a copper foil current collector, and electrolyte comprises HFE with the volume content of 1-20%. Compared with the prior art, the lithium secondary battery has the following advantages: (1) the copper-based current collector is directly used as the negative electrode, so that many potential safety hazards caused by metal lithium in the battery production process are eliminated, and meanwhile, the cost of the negative electrode is greatly reduced; (2) a proper amount of Li2O material is introduced into the positive electrode material, and a proper amount of HFE is introduced into the electrolyte, so that part of lithium ions can be provided for the negative electrode, a stable coating film is formed on the surface of the positive electrode material, and the service life of the battery is prolonged; (3) the electrochemical capacity of lithium ions and superoxide ions decomposed from Li2O is high (1350mAh / g), so that high capacity and high specific energy of the battery can be realized by adding a small amount of lithium oxide into the positive electrode material.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and relates to a novel lithium secondary battery, specifically based on Li-containing 2 A lithium secondary battery with an O positive electrode and an active material-free negative electrode and a preparation method thereof. Background technique [0002] The traditional lithium secondary battery is limited by the electrode material itself, and its energy density has gradually encountered a bottleneck in the development in recent years. Lithium metal battery is an emerging battery system in recent years. Thanks to its use of large-capacity metal lithium (3828mAh / g) in the negative electrode, it is considered to be expected to drive the power system of electric vehicles. However, due to the active chemical properties of lithium metal, there are many safety hazards in the production and use of lithium metal batteries, which restricts the production and preparation of lithium metal batteri...

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
IPC IPC(8): H01M4/62H01M4/13H01M4/131H01M4/66H01M10/0567H01M10/052H01M10/058
CPCH01M4/62H01M4/13H01M4/131H01M4/661H01M10/0567H01M10/052H01M10/058H01M2300/0025Y02P70/50
Inventor 周豪慎乔羽杨慧军何平
Owner NANJING UNIV
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