Fluorinated Acrylate Electrode Treatment for Dendrite Suppression
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Solution Overview
Problem
Alkali metal secondary batteries face a reduction in battery life due to the formation of dendrites on the alkali metal electrode during repeated charge and discharge cycles, leading to potential short circuits.
Innovation Solution
The use of an alkali metal electrode treatment agent containing a specific acrylate represented by the general formula (1), which includes a fluorine alkyl group, and/or a polymer derived from this acrylate, to suppress the precipitation of dendrites and improve battery life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If alkali metal is used as the negative electrode to achieve high theoretical capacity, then energy density is improved, but dendrites form during repeated charge and discharge leading to reduced battery life
Solution Approach 1:
The patent applies preliminary action by pre-forming a protective film on the alkali metal electrode surface using fluorine alkyl group-containing acrylate before battery operation. This protective layer is formed in advance to prevent dendrite formation during subsequent charge-discharge cycles, thereby extending battery life while maintaining high energy density
Solution Approach 2:
The fluorine alkyl group-containing acrylate acts as an intermediary substance between the alkali metal electrode and the electrolyte. This intermediary forms a protective interface layer that mediates the interaction between electrodes and electrolyte, preventing direct contact that would lead to dendrite formation while allowing ionic transport
2Reliability
If conventional electrode materials are used, then battery life is maintained, but energy density cannot be further improved
Solution Approach 1:
The patent changes the chemical composition parameters of the electrode surface by introducing fluorine alkyl group-containing acrylate with specific molecular structure. This parameter change modifies the surface properties to be more compatible with alkali metal, enabling the use of high-capacity alkali metal electrodes while maintaining battery life through formed protective films
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 proposed solution effectively suppresses the formation of dendrites, thereby enhancing the battery life and reducing resistance, leading to improved performance and longevity of alkali metal secondary batteries.
Implementation Method 1
an alkali metal electrode treatment agent comprising an acrylate represented by the following general formula (1)... which can improve the life of a battery by suppressing precipitation of dendrites
Implementation Method 2
electrolytic solution for an alkali metal secondary battery comprising an acrylate represented by the following general formula (1)
Data Source
AI summary
An alkali metal electrode treatment agent including an acrylate represented by the following general formula (1):wherein X, Y and Rf are as defined herein and/or a polymer containing an acrylate represented by the general formula (1) as a part or all of its constituent units. Also disclosed is an electrolytic solution for an alkali metal secondary battery and an alkali metal electrode including the acrylate represented by the general formula (1), an alkali metal secondary battery including the alkali metal electrode, and a module including the alkali metal secondary battery.