Electrode Plate Composition for Better Electrolyte Wettability
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Solution Overview
Problem
Lithium-ion batteries face challenges in improving rate capability, discharge capacity, and service life due to poor wettability of the electrolyte on the electrode plates, leading to increased interfacial impedance and reduced ion transmission efficiency.
Innovation Solution
Incorporating surfactant lithium salts into the active substance layer of the electrode plates, which reduces the surface tension of the electrolyte, enhancing its wettability and utilization efficiency, thereby improving the battery's performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional electrode plates without surfactant lithium salt are used, then the structure is simple and manufacturing is easy, but the wettability of electrolyte on electrode plate is poor and interfacial impedance is high
Solution Approach 1:
The patent changes the chemical composition parameter of the electrode plate by introducing surfactant lithium salt into the active substance layer. This parameter change modifies the surface properties of the electrode plate, reducing surface tension and improving electrolyte wettability without fundamentally altering the overall electrode structure.
Solution Approach 2:
The patent creates a composite structure by combining surfactant lithium salt with the active substance in the active substance layer. This composite approach allows the surfactant to modify surface properties while the active substance maintains its electrochemical function, achieving both good wettability and structural integrity.
2Productivity
If conventional electrode plates without surfactant lithium salt are used, then manufacturing is simple, but ion transmission efficiency is reduced and rate capability is poor
Solution Approach 1:
The patent modifies the chemical composition of the active substance layer by adding surfactant lithium salt, which changes the surface tension parameters and interfacial properties. This enables faster ion transmission and better rate capability while maintaining compatibility with existing manufacturing processes.
3Reliability
If conventional electrode plates are used, then the structure is straightforward, but discharge capacity and service life are limited
Solution Approach 1:
The patent optimizes the discharge capacity and service life by adjusting the chemical composition parameters of the active substance layer. The surfactant lithium salt improves electrolyte penetration and ion transmission, leading to better utilization of active material and extended battery life.
Solution Approach 2:
The surfactant lithium salt acts as an intermediary substance between the electrolyte and the active substance. It mediates the interaction by reducing interfacial tension and improving wetting, thereby enhancing ion transmission and electrochemical performance without being consumed in the reaction.
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 use of surfactant lithium salts in the electrode plates effectively enhances the wettability of the electrolyte, leading to improved rate capability, discharge capacity, and extended service life of lithium-ion batteries by reducing interfacial impedance and optimizing ion conductivity.
Implementation Method 1
The present disclosure effectively reduces the surface tension of the electrolyte by doping surfactant lithium salt in the active substance layer of the electrode plate
Implementation Method 2
utilizing the affinity of the lithium salt with the electrolyte, thereby enhancing the wettability of the electrolyte on the electrode plate
Implementation Method 3
lowering the interfacial impedance of the battery, and increasing the utilization efficiency of the active substance
Data Source
AI summary
Provided are an electrode plate, a lithium-ion battery, a battery module, a battery pack, and an electric device. The electrode plates provided in the present disclosure include a current collector and an active substance layer disposed on at least one surface of the current collector, wherein the active substance layer includes a surfactant lithium salt.