Nanofibre Membrane Cathode Structure for Battery Capacity and Cycle Life
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current rechargeable battery technologies, particularly lithium-ion batteries, face challenges in life cycle, heat stability, ion diffusion, and energy storage efficiency, which are not fully met by existing morphologies of positive electrodes, necessitating innovative solutions for improved electrochemical properties.
Innovation Solution
The synthesis of positive electrodes with 1-D, 2-D, or 3-D morphologies using nano or micro fiber mats with precursor compounds, subjected to hot pressing between 250°C to 1000°C in an oxidizing or inert atmosphere, to enhance electrochemical performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional positive electrode materials (LiCoO2, LiNiO2, LiMn2O4) are used to achieve good electrochemical properties, then storage capacity and performance rate are improved, but thermal stability and life cycle deteriorate
Solution Approach 1:
The patent changes the physical and chemical parameters of the electrode material by controlling particle size (reducing to nanoscale), adjusting morphology (spherical, polyhedral, irregular shapes), and modifying composition (doping with Al, Ti, Zr, Nb, Ta) to achieve both high storage capacity and improved thermal stability
Solution Approach 2:
The patent creates composite materials by doping transition metal oxides with multiple elements (Al, Ti, Zr, Nb, Ta) and combining them with conductive materials like carbon black and graphite, forming a composite structure that simultaneously enhances capacity, stability, and thermal resistance
2Use of energy by moving object
If positive electrode materials are designed for high energy density, then energy storage capacity is improved, but ion diffusion and life cycle deteriorate
Solution Approach 1:
The patent segments the electrode material into fine particles with controlled size distribution (0.1-10 micrometers), creating a segmented structure that shortens ion diffusion paths while maintaining high energy density, thereby improving both energy storage and cycle life
Solution Approach 2:
The patent introduces morphological dimensions (spherical, polyhedral, irregular shapes) and size distributions to optimize the electrode structure, creating three-dimensional architectures that enhance ion diffusion in multiple directions while maintaining high energy density
3Reliability
If thin layer processing is implemented to improve safety, then security is improved, but manufacturing complexity increases
Solution Approach 1:
The patent changes the thickness parameter of the positive electrode layer to a thin layer configuration (reduced thickness), which inherently improves safety by reducing thermal runaway risk while the controlled particle size and morphology maintain performance
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
This approach results in improved life cycle, ion diffusion, and energy storage capacity, addressing the limitations of existing technologies and meeting current market demands for rechargeable batteries.
Implementation Method 1
subjected to hot pressing between 250°C to 1000°C in an oxidizing or inert atmosphere
Implementation Method 2
baking process is carried out in the range of 250 to 1000° C. in an oxidizing atmosphere or in an inert atmosphere or combination between them
Data Source
AI summary
A positive electrode of an active material of interconnected polycrystalline and porous particles for secondary battery has been developed to achieve greater diffusion, excellent specific capacity and life cycle. The active material of the positive electrode for secondary battery is obtained from a hot-pressing process to which the composite fiber membrane is subjected with the precursors of the active metals and the polymer, obtaining morphologies such as monocrystalline particles, two-dimensional plates, and bars.