Composite Electrolyte Layer for Short-Circuit-Resistant Battery Members
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional secondary batteries face challenges in achieving improved safety and discharge characteristics without compromising capacity retention rates.
Innovation Solution
The battery member incorporates an electrode mixture layer containing an electrode active material, an organic solvent, and an electrolyte salt, and an electrolyte layer with a polymer and oxide particles, which enhances discharge characteristics and safety by preventing electrode short circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an organic solvent is used in the electrode mixture layer to improve discharge characteristics and capacity retention rate, then the discharge characteristics and capacity retention rate are improved, but the safety is likely to be impaired
Solution Approach 1:
An electrolyte layer containing a polymer and oxide particles is introduced as an intermediary component between the electrode mixture layer and the external environment. This electrolyte layer acts as a mediator that allows ion transport while preventing direct contact between the organic solvent and potential ignition sources, thus maintaining discharge characteristics while improving safety
Solution Approach 2:
The electrolyte layer is formed as a composite material combining a polymer matrix with oxide particles dispersed within it. This composite structure provides both the ion conductivity needed for battery operation and the thermal stability required for safety, allowing the organic solvent to function properly while being protected from hazards
2Device complexity
If a conventional separator configured only by a polymer is used, then the structure is simple, but short circuit between electrodes cannot be suppressed at high temperatures
Solution Approach 1:
The separator is constructed as a composite material combining a polymer base with dispersed oxide particles. The polymer provides flexibility and ion conductivity, while the oxide particles provide high-temperature stability and maintain structural integrity at elevated temperatures, preventing short circuits between electrodes
Solution Approach 2:
By adding oxide particles to the polymer separator, the thermal stability parameter is enhanced. The oxide particles raise the decomposition temperature and maintain the separator's physical properties at high temperatures, enabling it to suppress short circuits under thermal stress conditions
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 configuration results in a secondary battery with enhanced safety and discharge performance, along with improved capacity retention rates.
Implementation Method 1
the oxide particles secure insulation properties between electrodes, as compared to a conventional separator configured only by a polymer, short circuit between electrodes can be suppressed
Implementation Method 2
an interface between the electrode active material and the electrolyte salt, which is an ion conductive component, and an interface between the electrode mixture layer and the electrolyte layer each are favorably formed by using the organic solvent in the electrode mixture layer
Data Source
AI summary
A battery member includes: a current collector; an electrode mixture layer provided on the current collector; and an electrolyte layer provided on the electrode mixture layer, in which the electrode mixture layer contains an electrode active material, an organic solvent, a polymer, and an electrolyte salt, and the electrolyte layer contains a polymer, an oxide particle, and an electrolyte salt.