Battery Anode Mesoporous Composite for Faster 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 ordered pore channels, optimizing parameters like mass percentage, particle size distribution, and specific surface area to improve cycle and kinetic performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional pouch battery design is used, then the battery structure is simple and easy to manufacture, 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 composite negative electrode material layer. This composite structure improves cycle performance and kinetic performance while maintaining manufacturability, as the ordered mesoporous material provides a structured framework that enhances electrolyte storage and ion transmission without requiring complete redesign of the battery architecture.
Solution Approach 2:
The patent applies porous materials by incorporating ordered mesoporous materials with controlled pore sizes (50 nm to 400 nm) into the negative electrode material layer. These porous structures increase electrolyte storage capacity and facilitate ion transmission, directly improving cycle performance and kinetic performance. The ordered pore channels provide efficient pathways for ion diffusion, enhancing battery reliability without significantly complicating the manufacturing process.
2Productivity
If ordered mesoporous material is added to enhance electrolyte storage and ion transmission, then cycle performance and kinetic performance improve, but the device complexity increases
Solution Approach 1:
The patent applies parameter changes by optimizing the particle size of ordered mesoporous material (50 nm to 400 nm) and controlling its mass percentage (0.05% to 0.5%) in the negative electrode material layer. These parameter optimizations enhance ion transmission efficiency and charging speed while keeping the material composition manageable. The specific particle size range ensures efficient ion diffusion pathways, and the controlled mass percentage balances performance improvement with manufacturing feasibility.
3Reliability
If ordered mesoporous material with specific particle size range is used, then ion transmission efficiency improves, but manufacturing precision requirements increase
Solution Approach 1:
The patent applies parameter changes by defining a specific particle size range (50 nm to 400 nm) for ordered mesoporous material that optimizes kinetic performance while remaining manufacturable. This parameter range balances ion transmission efficiency with manufacturing feasibility, as it provides sufficiently small pores for efficient ion diffusion while avoiding ultra-fine particle handling challenges. The patent further refines this by specifying Dv50 values (0.05 μm to 0.4 μm) that are achievable with conventional manufacturing techniques.
Solution Approach 2:
The patent uses composite materials to mitigate manufacturing precision challenges by combining ordered mesoporous material with negative active material in a composite structure. This composite approach allows the ordered mesoporous material to provide structural framework and ion transmission pathways while the negative active material contributes to capacity, distributing the performance requirements across multiple components and reducing the burden on single-material precision control.
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
The negative electrode material layer includes a negative active material and an ordered mesoporous material... improving the electrolyte storage capacity of the material layer
Implementation Method 2
ordered pore channels in the ordered mesoporous material can promote the storage and transmission of an electrolyte solution
Data Source
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.