Ionic Liquid Electrodeposition Suppressing Dendritic Growth

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Current electrodeposition methods using ionic liquid electrolytes face challenges in achieving high deposition rates and maintaining structural integrity due to runaway dendritic growth and lack of effective surface leveler additives, limiting their use to small-scale laboratory applications.

Innovation Solution

Development of electrodeposition baths containing aluminum ionic species, a second metal ionic species, and specific additives such as organic cosolvents and polymers, along with reactor designs and process control methods, to suppress dendritic growth and enable high-rate deposition of aluminum alloys with controlled grain sizes and structural properties.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If conventional electrodeposition methods are used in ionic liquid electrolytes, then deposition can occur, but runaway dendritic growth occurs and deposition rates are limited

Engineering Contradiction:

Improvedeposition rateVSAvoidstructural integrity

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent modifies the chemical parameters of the electrolyte by introducing specific organic cosolvents (acetonitrile, dimethyl carbonate, ethyl methyl carbonate) at controlled concentrations (5-50 vol%). This changes the electrolyte composition to suppress dendritic growth while maintaining high deposition rates, directly resolving the contradiction between productivity and reliability

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent introduces organic cosolvents as intermediary substances that mediate between the ionic liquid electrolyte and the depositing metal ions. These cosolvents act as surface levelers that modify the deposition interface, preventing runaway dendritic growth while enabling controlled high-rate deposition, thus resolving the structural integrity issue

Inventive Principle:

Principle #24Intermediary (Mediator)

2Productivity

If high deposition rates are achieved, then productivity increases, but dendritic growth and loss of structural integrity occur

Engineering Contradiction:

Improvedeposition rateVSAvoiddendritic growth

Core Design Contradiction:

ProductivityVSObject-generated harmful factors

Solution Approach 1:

The patent converts the harmful effect of high deposition rates (which cause dendritic growth) into a benefit by using organic cosolvents that specifically suppress dendrite formation. The cosolvents enable the system to operate at high deposition rates while transforming the potentially harmful dendritic growth into controlled, uniform deposition with improved structural integrity

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Reliability

If ionic liquid electrolytes are used, then unique electrochemical properties are achieved, but effective surface leveler additives are lacking

Engineering Contradiction:

Improveelectrochemical propertiesVSAvoidadditive availability

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent achieves universality by combining ionic liquids with organic cosolvents that serve multiple functions: they act as surface levelers, maintain electrolyte stability, and enable high deposition rates. This multi-functional approach resolves the limitation of lacking effective additives while preserving the unique electrochemical properties of ionic liquids

Inventive Principle:

Principle #6Universality (Multi-functionality)

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

Enables the deposition of coatings and thick monolithic structures with improved structural properties at high rates, maintaining the integrity of ionic liquid electrolytes within predefined operating limits, suitable for industrial-scale applications.

Implementation Method 1

driving the power supply to electrodeposit an aluminum alloy on the cathode

Methodology Applied

Scientific EffectElectrodeposition: Electrodeposition

Implementation Method 2

electrochemical deposition of aluminum

Methodology Applied

Scientific EffectElectrochemical reduction: Electrolysis

Data Source

PatentEP2971262B1Electrodeposition in ionic liquid electrolytes

Publication Date: 2019.09.18 XTALIC CORP

Figure 1~3A
Figure 4A~4B
Figure 5A~5B

AI summary

Embodiments of the current disclosure are related to electrodeposition. Electrodeposited stable nano structured aluminum manganese alloys exhibit an exceptional combination of high hardness and tensile ductility. In addition to the combination of high hardness and tensile ductility, the alloys are approximately the same density as other aluminum alloys. This combination of high strength, ductility, and light weight make it an ideal structural material for applications such as armor, aircraft, sporting equipment, and other applications where a light weight high strength ductile material would be of benefit.