Phosphate Electrolyte Additive for Wide-Temperature Battery Ion Transport
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Solution Overview
Problem
Existing electrolytic solutions for batteries do not effectively improve high-temperature and low-temperature performance.
Innovation Solution
An electrolytic solution containing a phosphate additive with a three-dimensional skeleton structure, which participates in the formation of the solid electrolyte interface (SEI) film, creating cavity channels to enhance ion transport efficiency and improve temperature stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional phosphate additives are used in electrolytic solutions, then room-temperature cycle performance is improved, but high-temperature and low-temperature performance remains insufficient
Solution Approach 1:
The patent introduces a cyclic phosphate additive with a specific molecular structure containing oxygen-containing rings that form porous SEI films. The porous structure creates cavity channels that facilitate ion transport while maintaining film integrity, thereby improving high-temperature and low-temperature performance without compromising room-temperature cycle stability.
Solution Approach 2:
The patent modifies the molecular structure of phosphate additives by introducing specific ring structures with oxygen-containing groups. This structural parameter change enables the additive to form SEI films with optimized porosity and ion transport properties, achieving broad temperature range performance improvement.
2Reliability
If SEI film density is increased to improve stability, then ion transport efficiency decreases, but if SEI film porosity is increased to improve ion transport, then film stability decreases
Solution Approach 1:
The patent employs a cyclic phosphate additive with ring structures that self-assemble to form SEI films containing controlled porosity. The oxygen-containing rings create cavity channels that maintain structural stability while providing pathways for efficient ion transport, resolving the contradiction between film density and ion conductivity.
Solution Approach 2:
The patent creates a composite SEI film structure through the cyclic phosphate additive, combining dense regions for stability with porous cavity channels for ion transport. This composite architecture simultaneously achieves both film integrity and high ion transport efficiency across different temperatures.
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 solution enhances the high-temperature and low-temperature performance of batteries by increasing the porosity of the SEI film, thereby reducing the influence of temperature on ion transport efficiency.
Implementation Method 1
participates in the formation of the solid electrolyte interface (SEI) film, creating cavity channels to enhance ion transport efficiency
Implementation Method 2
increasing the porosity of the SEI film, thereby reducing the influence of temperature on ion transport efficiency
Data Source
AI summary
An electrolytic solution and a battery. The electrolytic solution is provided. The electrolytic solution includes an additive, and the additive has a structure as shown in formula 1. The provided phosphate electrolytic solution additive has a three-dimensional skeleton structure as shown in formula 1.