Fluorinated Pyridine Surface Treatment for Battery Electrode Corrosion
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Solution Overview
Problem
Current electric batteries, particularly lithium-ion secondary batteries, face challenges in improving cycle characteristics and preventing corrosion of current collector foils.
Innovation Solution
A surface-treating agent for electrode materials, comprising a pyridine skeleton and fluorine, is used to treat positive electrode active materials, current collector foils, negative electrode active materials, conductive aids, and electrodes, forming a stable protective film that enhances battery performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional surface treatment methods are used on current collector foils and electrode materials, then basic electrochemical performance is maintained, but cycle characteristics deteriorate and corrosion occurs
Solution Approach 1:
The patent introduces a surface treating agent comprising a pyridine skeleton and fluorine as an intermediary substance that forms a protective film between the current collector foil/electrode material and the corrosive battery environment. This intermediary layer prevents direct contact between harmful substances and the substrate, thereby improving cycle characteristics and preventing corrosion without affecting electrochemical performance
Solution Approach 2:
The patent creates a composite surface structure by combining the base material (current collector foil or electrode material) with a fluorinated protective film containing pyridine groups. This composite structure integrates the conductivity and mechanical properties of the substrate with the protective and stabilizing properties of the fluorinated surface layer, achieving both corrosion resistance and maintained electrochemical function
2Object-affected harmful factors
If fluorine is introduced to improve corrosion resistance, then protection is enhanced, but complexity of surface treatment increases
Solution Approach 1:
The patent modifies the chemical parameters of the surface treatment by incorporating both pyridine skeletons and fluorine atoms into the surface treating agent. This dual-component approach optimizes the balance between protective performance and treatment simplicity, where the pyridine framework provides structural stability and the fluorine atoms deliver corrosion resistance, achieving effective protection through a well-defined chemical composition
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 surface-treating agent improves the cycle characteristics of batteries by enhancing capacity retention and preventing or reducing corrosion of current collector foils, while also improving ion conductivity.
Implementation Method 1
surface-treating agent for an electrode material, including a pyridine skeleton and fluorine... forming a stable protective film
Data Source
AI summary
The disclosure aims to provide a surface-treating agent for an electrode material, a positive electrode active material, a current collector foil, a negative electrode active material, an electrode, a battery, a method for producing a positive electrode active material, a method for producing a current collector foil, a method for producing a negative electrode active material, a method for producing a conductive aid, and a method for producing an electrode which are capable of improving the cycle characteristics of batteries and preventing or reducing corrosion of current collector foils. The disclosure relates to a surface-treating agent for an electrode material, including a pyridine skeleton and fluorine.