Lamellar Double Hydroxide Electrodes for High Energy Density Storage

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Solution Overview

Problem

Current energy storage devices such as batteries and supercapacitors face limitations in energy performance, weight, size, and environmental impact due to their materials, which are often polluting and require costly recycling.

Innovation Solution

The use of ferric ferrous oxyhydroxysalts, specifically lamellar double hydroxides with a divalent and trivalent cation composition, as electrodes in energy storage devices, offering a higher theoretical electrical energy capacity and reduced environmental impact through a non-polluting and cost-effective manufacturing process.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If conventional materials are used in current batteries and supercapacitors, then the devices can store electrical energy, but the energy performance is limited and the weight and size are large

Engineering Contradiction:

Improveenergy performanceVSAvoidweight

Core Design Contradiction:

Use of energy by moving objectVSWeight of moving object

Solution Approach 1:

The patent changes the chemical composition parameters of the electrode material by using ferric ferrous oxyhydroxysalts with specific FeII/FeIII ratios and controlled water content, achieving higher energy density and performance while reducing weight compared to conventional battery materials

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention employs composite ferric ferrous oxyhydroxysalt structures combining divalent and trivalent cations in a lamellar double hydroxide framework, creating a material with optimized properties for both high energy performance and reduced weight

Inventive Principle:

Principle #40Composite materials

2Use of energy by moving object

If conventional materials are used in current batteries and supercapacitors, then the devices can store electrical energy, but the size is large

Engineering Contradiction:

Improveenergy performanceVSAvoidsize

Core Design Contradiction:

Use of energy by moving objectVSVolume of moving object

Solution Approach 1:

The patent optimizes the molecular structure parameters of the oxyhydroxysalt by controlling the ratio of FeII to FeIII and the water content, achieving higher energy capacity in a more compact form factor, thus reducing overall device size

Inventive Principle:

Principle #35Parameter changes

3Use of energy by moving object

If conventional materials are used in current batteries and supercapacitors, then the devices can store electrical energy, but the environmental impact is negative due to polluting waste

Engineering Contradiction:

Improveenergy performanceVSAvoidpolluting waste

Core Design Contradiction:

Use of energy by moving objectVSObject-generated harmful factors

Solution Approach 1:

The patent uses abundant, non-toxic iron-based oxyhydroxysalt materials that can be disposed of without harmful environmental impact, replacing conventional materials that generate polluting waste requiring expensive recycling processes

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The invention transforms the naturally occurring degradation process of ferrous materials (which typically produces harmful rust) into a beneficial pathway where green rust forms and can be utilized as the active electrode material, converting a harmful environmental byproduct into a useful energy storage component

Inventive Principle:

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

4Use of energy by moving object

If conventional materials are used in current batteries and supercapacitors, then the devices can store electrical energy, but the production cost is high due to recycling requirements

Engineering Contradiction:

Improveenergy performanceVSAvoidproduction cost

Core Design Contradiction:

Use of energy by moving objectVSEase of manufacture

Solution Approach 1:

The patent employs inexpensive iron-based oxyhydroxysalt materials that eliminate the need for costly recycling infrastructure, reducing production and end-of-life management costs while maintaining high energy performance

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

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 ferric ferrous oxyhydroxysalt electrodes provide a significant increase in energy performance, with a theoretical capacity of at least 160 Ah/kg, faster charge and discharge times, and the ability to be used in various energy storage devices without adverse environmental effects, making them suitable for applications like electric cars and reducing the need for extensive recycling processes.

Implementation Method 1

electrical energy storage devices such as cells, batteries or accumulators, harbor a chemical reaction between two substances, one of which can easily give up electrons (the reducer), and the other accept them (the oxidant). Such a reaction is called an oxidation-reduction.

Methodology Applied

Scientific EffectOxidation-reduction reaction: Redox Reactions

Data Source

PatentEP2315722B1Use of an oxyhydroxy salt related to the family of lamellar double hydroxides for the design and manufacture of an electrode in view of storing electrical energy

Publication Date: 2020.02.05 UNIVERSITY OF LORRAINE

Figure 1A~1D
Figure 2(a)~2(j)
Figure 3

AI summary

The present invention relates to the use of an oxyhydroxy salt related to the family of lamellar double hydroxides for the design and manufacture of an electrode with a view to storing electrical energy.