Continuous Electrodeposition of Lithium Sources for Uniform Battery Electrodes
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Solution Overview
Problem
Conventional methods for adding additional lithium sources in batteries result in uneven dispersion and the accumulation of gases or bubbles, leading to decreased capacity and life cycles due to mechanical mixing, causing quality issues.
Innovation Solution
A continuous processing equipment with a first and second reaction part separated by a selectively permeable layer, allowing selective ion transfer and gas discharge, ensuring even metal deposition on the electrode without interference from gases or bubbles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If additional lithium sources are mixed directly in the electrode slurry or electrolyte, then the battery capacity can be increased, but the lithium source particles become unevenly dispersed and gases or bubbles accumulate causing quality problems
Solution Approach 1:
The patent replaces the mechanical mixing method with an electrochemical deposition method. Instead of mechanically mixing lithium particles into the slurry, the invention uses electrochemical reactions to deposit lithium metal atoms uniformly onto the electrode surface from the electrolyte, eliminating the uneven distribution problem caused by mechanical mixing
Solution Approach 2:
The patent introduces an intermediary electrochemical process involving reaction solutions and separated layers. The lithium source is not directly mixed but is transferred through an intermediary electrochemical deposition process where lithium ions in the electrolyte are reduced and deposited onto the electrode, ensuring uniform distribution
2Quantity of substance
If additional lithium sources are mixed directly in the electrode slurry or electrolyte, then the battery capacity can be increased, but gases or bubbles accumulate causing quality problems and electrochemical decline
Solution Approach 1:
The patent replaces mechanical mixing that generates gas bubbles with an electrochemical deposition process. The electrochemical method deposits lithium atoms directly onto the electrode surface through controlled reduction reactions, avoiding the mechanical agitation and gas bubble formation that occurs during mixing
Solution Approach 2:
The patent converts the harmful side reactions and gas bubble formation into a beneficial controlled electrochemical deposition process. By using controlled electrochemical reactions, the method eliminates the harmful gas bubbles while still achieving the goal of adding lithium source to increase capacity
3Ease of manufacture
If conventional mixing method is used to add lithium source, then the process is simple, but the disperse of lithium source is uneven and causes quality problems
Solution Approach 1:
The patent replaces the simple but ineffective mechanical mixing process with an electrochemical deposition system. While the equipment is more complex, it achieves uniform lithium source distribution through controlled electrochemical reactions, where lithium ions are reduced and deposited uniformly on the electrode surface
Solution Approach 2:
The patent changes the fundamental parameters of the lithium addition process from mechanical mixing to electrochemical deposition. By controlling electrochemical parameters such as current density, voltage, and electrolyte composition, the method achieves uniform lithium distribution that cannot be obtained by mechanical mixing
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 equipment enables even metal deposition on the electrode, increasing battery capacity and quality by discharging gases, allowing adjustable metal quantity through controlled electrolyte concentration, and supporting continuous production.
Implementation Method 1
the first reaction part is selectively permeable with certain ions from the second reaction part through the separated layer
Implementation Method 2
the second metallic ion passes through the separated layer from the first reaction cell to the second reaction cell and reducing as a metal deposit onto the working electrode
Data Source
AI summary
Equipment for continuously processing electrochemical devices or components for increasing capacity comprises a first reaction part, a second reaction part and a separated layer in between. The first reaction part comprises a counter electrode and a first reaction solution contained in a first reaction cell having a gas outlet. The first reaction solution will produce a first non-metallic ion, a second metallic ion and a gas after an electrochemical reaction. The second reaction part comprises a working electrode and a second reaction solution containing the second metallic ion permeated through the separated layer from the first reaction part. The second metallic ion will then be deposited as metal particles onto the working electrode which has been continuously fed into the second reaction part. The equipment can continuously produce electrodes with additional lithium source without a gas byproduct and with even distribution and high quality.