Electrode Assembly Composition for Higher Lithium-Ion Energy Density
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Lithium ion batteries have a lower energy density, making them inadequate for meeting the increasing demands of portable electronic devices and electric vehicles, which requires improved performance and endurance.
Innovation Solution
An electrode assembly is designed with a positive electrode plate containing a quinone compound and a negative electrode plate with a conductive polymer material, optimizing the mass content and capacity ratios to enhance lithium storage and kinetic performance, thereby increasing the energy density of lithium ion batteries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional electrode materials are used, then the battery structure is simple and easy to manufacture, but the energy density is low and cannot meet increasing demands
Solution Approach 1:
The patent applies composite materials by combining quinone compounds with conventional positive electrode active materials (such as lithium iron phosphate, lithium cobalt oxide, or lithium nickel cobalt manganese oxide) and conductive polymer materials with negative electrode active materials (such as graphite or lithium titanate). This composite approach increases energy density while maintaining manageable structural complexity through systematic formulation.
Solution Approach 2:
The patent implements parameter changes by precisely controlling the mass content ratios of quinone compounds (0.5-3% of positive electrode active material mass) and conductive polymer materials (specific mass percentages in negative electrode), as well as controlling areal densities of electrode active material layers. These parameter optimizations enable energy density improvement while keeping the electrode structure manufacturable.
2Quantity of substance
If quinone compound and conductive polymer are added to increase energy density, then lithium storage capacity and kinetic performance improve, but electrode formulation and manufacturing precision requirements increase
Solution Approach 1:
The patent establishes specific parameter ranges for quinone compound mass content (0.5-3% relative to positive electrode active material) and conductive polymer mass content (specific percentages relative to negative electrode active material), along with areal density ranges for electrode active material layers. These defined parameters provide clear manufacturing targets that balance performance improvement with manufacturability.
Solution Approach 2:
The patent applies local quality by specifying different mass content requirements for different components: quinone compounds at 0.5-3% in the positive electrode active material layer, conductive polymer materials at specific mass percentages in the negative electrode active material layer, and controlled areal densities for different electrode layers. This localized optimization enables precise control over lithium storage capacity while maintaining manufacturing feasibility through component-specific formulation guidelines.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The cooperative control of quinone compound and conductive polymer proportions in the electrode assembly significantly improves the energy density of lithium ion batteries, enhancing their performance and endurance in power-consuming devices.
Implementation Method 1
the quinone compound comprised in the positive electrode active material layer of the positive electrode plate of the present application provides additional lithium intercalation vacancies to increase the lithium storage capacity of the positive electrode plate
Implementation Method 2
the conductive polymer material comprised in the negative electrode active material layer is used to improve the kinetic performance of the negative electrode plate and increase the content of lithium de-intercalated from the lithium ion battery during discharging
Data Source
AI summary
An electrode assembly may comprise a positive electrode plate and a negative electrode plate, wherein a positive electrode active material layer of the positive electrode plate may comprise a positive electrode active material and a quinone compound; and a negative electrode active material layer of the negative electrode plate may comprise a negative electrode active material and a conductive polymer material, wherein based on the mass of the positive electrode active material layer, the mass content of the quinone compound mc % may be 0.5% to 3%; the capacity per gram of the quinone compound may be Capc; the capacity per gram of the positive electrode active material may be Cap; and based on the mass of the negative electrode active material layer, the mass content of the conductive polymer material may be mA %, satisfying the relationship of:0.2≤CapC-CapCap×mC/mA≤5.