Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Secondary battery with lithium supplement electrode and preparation method thereof

A technology for secondary batteries and lithium supplementation, which is applied in the manufacture of secondary batteries, electrolyte batteries, non-aqueous electrolyte batteries, etc., and can solve the problems of low first cycle and cycle efficiency

Active Publication Date: 2018-09-14
BEIJING WELION NEW ENERGY TECH CO LTD
View PDF16 Cites 41 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using this kind of negative electrode can increase the energy density of the battery to 300wh / kg, but the first cycle and cycle efficiency of this kind of negative electrode are lower than that of the positive electrode

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
  • Secondary battery with lithium supplement electrode and preparation method thereof
  • Secondary battery with lithium supplement electrode and preparation method thereof
  • Secondary battery with lithium supplement electrode and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0046] A 1Ah lithium cobaltate / graphite soft-packed battery cell is prepared by stirring, coating, rolling, pole piece cutting, baking pole piece, and lamination. The capacity ratio N / P of the negative electrode material and the positive electrode material is about 1. After winding a layer of separator, place a lithium supplementary pole piece on the left side of the dry cell to make a lithium supplementary dry battery cell. The lithium supplementary pole piece includes a copper foil current collector and a metal lithium layer formed on the current collector. The tabs are welded for lithium-supplementing dry cells, wherein the tabs for lithium-supplementing are nickel tabs, then packaged and injected with electrolyte to form a secondary battery. Cycling at 0.5°C, replenishing lithium with a capacity of 0.03Ah to the positive electrode after charging in the first week, the efficiency in the first week is 95%. After subsequent weekly charging, lithium with a capacity of 0.001425...

example 2

[0048]A 1Ah lithium cobaltate / silicon negative electrode soft-packed battery is prepared by stirring, coating, rolling, pole piece cutting, baking pole piece, and lamination. The N / P ratio is about 1.1. After winding a layer of separator, On the left side of the dry cell, a lithium-aluminum alloy strip pole piece with a steel mesh current collector nickel tab is placed to make a lithium-supplemented dry cell. The tabs are welded for lithium-supplementing dry cells, and packaged into a casing to form a secondary battery. Cycling was performed at 0.5°C, and 0.1Ah of lithium was added to the negative electrode after the first week of charging. After subsequent weekly charging, 0.14Ah capacity lithium was added to the silicon negative electrode. After 20 weeks of cycling, the Coulombic efficiency is 99.87%, and the capacity retention rate is 87.5%.

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
thicknessaaaaaaaaaa
porosityaaaaaaaaaa
Login to View More

Abstract

The invention relates to a secondary battery with a lithium supplement electrode and a preparation method thereof. According to one exemplary embodiment, the secondary battery can include positive pole sheets and negative pole sheets which are isolated from each other through diaphragms, and at least one lithium supplementing pole sheet which includes a lithium active layer, wherein at least one lithium supplementing pole sheet is isolated from the positive pole sheets and the negative pole sheets through the diaphragms. The secondary battery of the invention can achieve high capacity and hasthe lithium supplement electrode, so that a lithium element can be supplemented to the negative pole sheets or the positive pole sheets in a first circulation or a circulation process to achieve highcoulombic efficiency and to improve circulation characteristics.

Description

technical field [0001] The present invention generally relates to the field of new energy sources, and more particularly relates to a secondary battery with a lithium-supplementing electrode, which can supplement lithium elements to the negative electrode sheet or positive electrode sheet of the secondary battery during the first or cycle process, and also relates to A method of making such a secondary battery with a lithium-replenishing electrode. Background technique [0002] In recent years, the rapidly developing electric vehicle and energy storage industries have put forward higher requirements for the energy density, cost, cycle and safety of secondary batteries represented by lithium-ion batteries and sodium-ion batteries. Taking lithium-ion batteries as an example, conventional lithium-ion batteries mainly use graphite negative electrodes, and the theoretical capacity of graphite negative electrodes is 372mAh / g. The capacity of g is close to the limit of theoretical...

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): H01M4/134H01M10/0525H01M10/058
CPCH01M4/134H01M10/0525H01M10/058Y02E60/10Y02P70/50
Inventor 黄杰李文俊李泓
Owner BEIJING WELION NEW ENERGY TECH CO LTD
Features
  • Generate Ideas
  • 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