Phosphorous Electrolyte Additives for Zinc Battery Corrosion Control

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Solution Overview

Problem

Zinc-based batteries suffer from hydrogen evolution and corrosion due to zinc electrode reactions, leading to reduced shelf-life, cycle efficiency, and mechanical failures.

Innovation Solution

The use of phosphorous electrolyte additives in zinc batteries, formulated as specific compounds or combinations, mitigates hydrogen evolution and corrosion, enhancing coulombic efficiency and shelf-life.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If zinc-based batteries use aqueous electrolytes, then they are environmentally friendly and nonflammable, but hydrogen evolution and corrosion occur leading to reduced shelf-life and cycle efficiency

Engineering Contradiction:

Improveshelf-lifeVSAvoidhydrogen evolution

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent introduces phosphorous-containing compounds as intermediary substances in the aqueous electrolyte. These compounds act as mediators between the zinc electrode and the electrolyte, forming protective interface layers that prevent direct harmful interactions while maintaining ionic conductivity. The phosphorous compounds serve as sacrificial intermediaries that protect the zinc electrode from corrosion and suppress hydrogen evolution reactions.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent modifies the chemical composition parameters of the electrolyte by incorporating phosphorous-containing compounds at specific concentrations (0.001-50 wt%). This parameter change alters the electrochemical properties of the electrolyte interface, shifting the reaction pathways to reduce hydrogen evolution and corrosion. The addition of phosphorous compounds changes the interfacial chemistry without fundamentally changing the aqueous nature of the electrolyte.

Inventive Principle:

Principle #35Parameter changes

2Productivity

If zinc-based batteries use aqueous electrolytes, then they are environmentally friendly and nonflammable, but corrosion occurs leading to reduced cycle efficiency

Engineering Contradiction:

Improvecycle efficiencyVSAvoidcorrosion

Core Design Contradiction:

ProductivityVSObject-generated harmful factors

Solution Approach 1:

Phosphorous-containing compounds serve as protective intermediaries that form stable interface layers on the zinc electrode surface. These intermediary layers prevent direct contact between the zinc and corrosive electrolyte components, thereby reducing corrosion rates and maintaining cycle efficiency over extended periods.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent converts the potentially harmful phosphorous compounds into beneficial protective agents. By carefully selecting phosphorous-containing substances, the invention transforms what could be corrosive elements into components that form protective films, turning a potential harm into a benefit that extends battery cycle life.

Inventive Principle:

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

3Reliability

If zinc-based batteries use aqueous electrolytes, then they are environmentally friendly and nonflammable, but internal pressure increases causing mechanical failures

Engineering Contradiction:

ImprovesafetyVSAvoidinternal pressure

Core Design Contradiction:

ReliabilityVSStress or pressure

Solution Approach 1:

The patent addresses the safety concern by converting the hydrogen evolution problem into a controlled scenario. By using phosphorous-containing compounds to suppress uncontrolled hydrogen gas generation, the invention prevents dangerous pressure buildup while maintaining the environmental benefits of aqueous electrolytes. The harmful hydrogen evolution is transformed into a controlled process that enhances safety.

Inventive Principle:

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

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 additives improve coulombic efficiency and extend the shelf-life of zinc batteries by reducing hydrogen evolution and corrosion, thereby increasing safety and performance.

Implementation Method 1

the phosphorous electrolyte additives described herein, optionally at particular concentrations and combinations, mitigate hydrogen evolution in zinc batteries

Methodology Applied

Scientific EffectAdsorption: Adsorption

Implementation Method 2

an electrochemical reduction product thereof

Methodology Applied

Scientific EffectElectrochemical reduction: Redox Reactions

Data Source

PatentUS20260031409A1Phosphorous electrolyte additives for aqueous batteries

Publication Date: 2026.01.29 OCTET SCIENTIFIC INC

AI summary

Provided herein are phosphorus battery electrolyte additive chemicals for use in aqueous batteries that prevent self-discharge in the form of corrosion and hydrogen evolution, which increases the efficiency and extends the shelf-life of the batteries.