Battery Anode Mesoporous Structure for Fast Charging Cycles
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Solution Overview
Problem
Current secondary batteries, such as lithium-ion batteries, face challenges in improving cycle performance and kinetic performance to meet consumer demands for longer runtime and faster charging speeds.
Innovation Solution
Incorporating an ordered mesoporous material, such as SiO2 or Al2O3, into the negative electrode material layer of the battery, which enhances electrolyte storage and transmission through regular pore channels, improving cycle and kinetic performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional electrode materials are used, then the battery structure is simple, but the cycle performance and kinetic performance are insufficient
Solution Approach 1:
The patent uses composite materials by combining ordered mesoporous materials (such as SiO2 or Al2O3) with negative active material (such as graphite) to form a negative electrode material layer. This composite structure improves cycle performance and kinetic performance while maintaining reasonable structural complexity.
Solution Approach 2:
The patent employs porous materials, specifically ordered mesoporous materials with controlled pore sizes (50 nm to 400 nm), to enhance electrolyte storage capacity and ion transmission. The porous structure provides pathways for electrolyte penetration and ion diffusion, thereby improving cycle and kinetic performance.
2Duration of action of moving object
If the battery is designed for longer runtime, then the energy density increases, but the charging speed may be compromised
Solution Approach 1:
The ordered mesoporous material structure with pore sizes of 50 nm to 400 nm provides efficient ion transmission channels that enable fast charging while supporting long runtime. The porous structure allows rapid electrolyte penetration and ion diffusion, resolving the trade-off between runtime and charging speed.
Solution Approach 2:
The patent changes physical parameters by controlling the pore size (50 nm to 400 nm) and mass percentage (0.05% to 0.5%) of the ordered mesoporous material. These parameter optimizations enable the battery to achieve both extended runtime and fast charging capability.
3Reliability
If ordered mesoporous material is added to improve performance, then cycle performance and kinetic performance improve, but the device complexity increases
Solution Approach 1:
The patent introduces ordered mesoporous materials with specific pore structures to enhance kinetic performance. The well-defined porous architecture provides efficient ion transmission pathways while maintaining a controlled and manageable increase in material layer complexity.
Solution Approach 2:
The patent optimizes parameters by controlling the mass percentage of ordered mesoporous material within 0.05% to 0.5% and pore sizes within 50 nm to 400 nm. These controlled parameter changes improve kinetic performance while preventing excessive complexity in the electrode structure.
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 ordered mesoporous material improves electrolyte storage and ion transmission, leading to enhanced cycle performance, kinetic performance, and energy density of the secondary battery.
Implementation Method 1
ordered pore channels in the ordered mesoporous material can promote the storage and transmission of an electrolyte solution
Data Source
Figure 1~2
Figure 3
AI summary
A secondary battery includes a positive electrode plate, an electrolyte solution, and a negative electrode plate. The negative electrode plate includes a negative current collector and a negative electrode material layer disposed on at least one surface of the negative current collector. The negative electrode material layer includes a negative active material and an ordered mesoporous material. A small-angle X-ray diffraction pattern of powder of the negative electrode material layer exhibits 3 diffraction peaks in a diffraction angle range of 0.5° to 5°, including a first diffraction peak in a diffraction angle range of 0.5° to 1.5°. A particle size distribution curve of the powder of the negative electrode material layer exhibits a first peak in a particle size range of 50 nm to 400 nm.