Bent Current Distribution Bar for Electrode Assembly Corrosion

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Solution Overview

Problem

Existing electrode assemblies for electrochemical processes face challenges in long-term reuse due to corrosion of the current supply bar, which is not adequately protected, leading to sustainability issues.

Innovation Solution

The electrode assembly design replaces the conventional hanger bar with a bent current distribution bar that extends laterally and longitudinally, eliminating the need for a hanger bar above the electrolyte, and features a core covered by an inert cladding to prevent corrosion, with a flexible attachment mechanism for easy mounting and demounting.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a conventional hanger bar is used for current supply, then the electrode assembly can be assembled and operated, but the current supply bar suffers from corrosion leading to reduced reliability and reusability

Engineering Contradiction:

Improvereusability of electrode assemblyVSAvoidcorrosion of current supply bar

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The current distribution bar is constructed as a composite structure with a conductive core (copper or aluminum) covered by a corrosion-resistant cladding layer (titanium or other valve metal). This composite design combines the high electrical conductivity of copper/aluminum with the corrosion resistance of titanium, resolving the contradiction between electrical performance and corrosion resistance.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

Different portions of the current distribution bar have different structural configurations: the first portion (above electrolyte) has a bent shape extending laterally, the second portion (along electrode substrate) extends longitudinally for current distribution, and the third portion connects these sections. This local differentiation optimizes both corrosion resistance in exposed areas and current distribution efficiency in submerged areas.

Inventive Principle:

Principle #3Local quality

2Reliability

If the current distribution bar is extended to reach the side of the electrolyte, then corrosion protection is improved, but the device complexity increases due to the bent configuration

Engineering Contradiction:

Improvecorrosion protection of current supplyVSAvoidbent configuration of current distribution bar

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The current distribution bar serves multiple functions simultaneously: it acts as a current conductor, a structural support element, and a corrosion-resistant barrier. The bent configuration allows a single component to fulfill both the current distribution function (through its longitudinal extension along the electrode substrate) and the corrosion protection function (through its lateral extension beyond the electrolyte), eliminating the need for a separate hanger bar.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Ease of repair

If restoration process is implemented for electrode assembly reuse, then sustainability is improved, but the process is hindered by corrosion of unprotected current supply components

Engineering Contradiction:

Improverestoration capability of electrode assemblyVSAvoidmaterial degradation from corrosion

Core Design Contradiction:

Ease of repairVSLoss of substance

Solution Approach 1:

The current distribution bar is pre-protected with a corrosion-resistant cladding layer before being exposed to the electrolyte environment. This protective layer acts as a cushion against corrosion, preventing material degradation and enabling the electrode assembly to withstand multiple operational cycles and restoration processes without losing structural integrity or electrical performance.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

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

This design enhances the durability and reusability of the electrode assembly by protecting the current distribution bars from corrosion and allowing for efficient current distribution to the electrode substrate, thereby extending the assembly's lifespan and facilitating easier restoration.

Implementation Method 1

The current distribution bar comprises an electrically conducting material, for conducting current from the hanger bar to the electrode substrate

Methodology Applied

Scientific EffectElectrical conduction: Conduction (electrical)

Implementation Method 2

Valve metals are also often used for the base structure of the electrode substrate. These metals are known as film-forming metals having the property of rapidly forming a passivating oxide film when connected as an electrode in the electrolyte

Methodology Applied

Scientific EffectPassivation: Oxidation

Data Source

PatentUS11926912B2Electrode assembly for electrochemical processes

Publication Date: 2024.03.12 PERMASCAND

AI summary

The invention is related to an electrode assembly for an electrochemical process comprising a current supply device, an elongated current distribution bar comprising first and second ends, and a sheet-shaped electrode substrate attached to the current distribution bar and having a longitudinal extension and a lateral extension. The current distribution bar comprises a first portion attached to the current supply device, a second portion extending along the electrode substrate, and a third portion extending between the first and second portions. The current distribution bar is bent between its first and second ends, and the current supply device is laterally and longitudinally positioned beyond the electrode substrate. The second portion at least partly extends longitudinally along the electrode substrate.