Check patentability & draft patents in minutes with Patsnap Eureka AI!

based on li 2 o Lithium secondary battery with positive electrode and negative electrode without active material and preparation method thereof

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, difficulties in practical use, and restrictions on the production and preparation of lithium metal batteries, so as to prolong life, reduce negative electrode costs, and increase capacity. and the effect of specific energy

Active Publication Date: 2022-06-21
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
  • based on li <sub>2</sub> o Lithium secondary battery with positive electrode and negative electrode without active material and preparation method thereof
  • based on li <sub>2</sub> o Lithium secondary battery with positive electrode and negative electrode without active material and preparation method thereof
  • based on li <sub>2</sub> o Lithium secondary battery with positive electrode and negative electrode without active material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The following methods were used to prepare the Li-containing 2 Lithium secondary battery with O positive electrode and active material-free negative electrode:

[0031] S1. Preparation of cathode material lithium oxide

[0032] Lithium oxide by thermal decomposition of lithium peroxide Li 2 O 2 get. First, the lithium peroxide Li 2 O 2 The powder is transferred to the inside of the tube furnace cavity, and argon Ar protective gas is quickly introduced at normal temperature to prevent it from being deteriorated in contact with air. After 5 hours of argon gas Ar, the tube furnace was heated (heating rate: 10 degrees per minute) and kept at 350 degrees for 5 hours. After that, stop heating and cool with the furnace. After the powder temperature reached room temperature, the samples were placed in the transfer chamber and transferred to an Ar glove box for storage. During the whole process, the influence of deterioration caused by contact with air is eliminated.

...

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 Li-based 2 A lithium secondary battery with a positive electrode and a negative electrode without active materials and a preparation method thereof, the positive electrode material of the lithium secondary battery includes lithium oxide with a weight content of 1-30 wt%, the negative electrode material is a copper foil current collector, and the electrolyte includes a volume content 1‑20% HFE. Compared with the prior art, the present invention has the following advantages: (1) the lithium secondary battery based on the negative electrode inactive material of the present invention utilizes the copper-based current collector to directly make the negative electrode, eliminating many safety hazards brought by metal lithium in the battery production process. hidden dangers, while greatly reducing the cost of the negative electrode; (2) introducing an appropriate amount of Li into the positive electrode material 2 O material, the introduction of an appropriate amount of HFE in the electrolyte can provide some lithium ions to the negative electrode, and at the same time form a stable coating film on the surface of the positive electrode material to prolong the life of the battery; (3) due to Li 2 O is decomposed into lithium ions and superoxide ions with a high electrochemical capacity (1350mAh / g), so the present invention adds a small amount of lithium oxide to the positive electrode material to achieve large capacity and high specific energy of the battery.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and relates to a new type of lithium secondary battery. 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 (3828 mAh / 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 restrict the production and preparation of lithium metal batteries on the one hand, and hinder...

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): H01M4/62H01M4/13H01M4/131H01M4/66H01M10/0567H01M10/052H01M10/058
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