Lithium Ionic Battery Electrode Using Peroxide Donor

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Solution Overview

Problem

Lithium ionic batteries face limitations in capacity and stability due to the use of lithium metallic oxides, which struggle to exhibit high initial electrical capacity, thermal stability, and sustainable electrical capacity after repeated charging and discharging, and existing alternatives lack sufficient lithium ion intercalation capacity.

Innovation Solution

A method involving a positive electrode active substance with a lithium ion donor, such as lithium peroxide or lithium oxide, combined with a positive electrode frame active substance like anatase titanium dioxide or carbon-sulfur composite, is used to form a lithium ionic energy storage element, where lithium ions are decomposed and intercalate repeatedly, enhancing capacity in a full cell configuration.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If lithium metallic oxides are used as positive electrode active substance, then the battery can operate with conventional materials, but the initial electrical capacity, thermal stability and electrical capacity sustainability are insufficient

Engineering Contradiction:

Improvethermal stability and capacity sustainabilityVSAvoidinitial electrical capacity

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The patent uses a composite positive electrode active substance consisting of lithium metallic oxide particles coated with lithium source material. This composite structure combines the stability of lithium metallic oxides with the high capacity of lithium source, achieving both thermal stability and high initial electrical capacity simultaneously

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent modifies the chemical composition parameters of the positive electrode by introducing lithium source material (such as lithium metal powder, lithium alloy powder, or lithium compound powder) with specific lithium content. This parameter change enables the material to provide sufficient lithium ions for intercalation while maintaining structural stability

Inventive Principle:

Principle #35Parameter changes

2Quantity of substance

If lithium sources are increased by coating lithium metal on negative electrode or forming lithium metal as third electrode, then the battery capacity can be increased, but the coating and electroplating film are not uniform due to lithium metal's high activity

Engineering Contradiction:

Improvebattery capacityVSAvoidfilm uniformity

Core Design Contradiction:

Quantity of substanceVSManufacturing precision

Solution Approach 1:

The patent applies lithium source material to the positive electrode before battery assembly, rather than attempting to coat lithium metal on the negative electrode during or after assembly. This preliminary action avoids the manufacturing difficulties of handling highly active lithium metal and ensures uniform distribution

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

Instead of adding lithium source to the negative electrode as conventionally done, the patent inverts the approach by incorporating lithium source material into the positive electrode active substance. This inversion simplifies the manufacturing process and achieves uniform lithium distribution

Inventive Principle:

Principle #13The other way round (Inversion)

3Quantity of substance

If materials like FeF3, FePO4 and V2O5 are used as positive electrode material, then the electrical capacity and platform voltage are improved, but the materials do not contain lithium ions and cannot be used in full cell

Engineering Contradiction:

Improveelectrical capacity and voltageVSAvoidfull cell applicability

Core Design Contradiction:

Quantity of substanceVSAdaptability or versatility

Solution Approach 1:

The patent merges high-capacity materials (such as FeF3, FePO4, or V2O5) with lithium source material in a composite structure. This combination allows the high-capacity material to provide excellent electrical capacity and voltage while the lithium source provides the necessary lithium ions for full cell operation

Inventive Principle:

Principle #5Merging (Combining)

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 method enables a lithium ionic energy storage element to achieve high capacity and stability by allowing lithium ions to intercalate repeatedly, surpassing the limitations of traditional lithium metallic oxides and enhancing energy density.

Implementation Method 1

lithium peroxide and/or lithium oxide can be decomposed to produce lithium ions

Methodology Applied

Scientific EffectDecomposition: Decomposition (biological)

Implementation Method 2

lithium ions intercalate repeatedly in and out of the positive electrode frame active substance and the negative electrode active substance

Methodology Applied

Scientific EffectIntercalation: Absorption (physical)

Implementation Method 3

filling an electrolyte into the porous separate strip

Methodology Applied

Scientific EffectIonic conduction: Conduction (electrical)

Data Source

PatentUS10446826B2Method for making lithium ionic energy storage element

Publication Date: 2019.10.15 AMITA TECH

AI summary

A method for making a lithium ionic energy storage element, the method includes the steps of: (a) mixing a lithium ion donor, a positive electrode frame active substance and a binder with a predetermined weight ratio to form a mixture, and adding the mixture into a dispersant to form a positive electrode active substance, wherein the lithium ion donor includes lithium peroxide, lithium oxide or a combination thereof; (b) coating the positive electrode active substance on an aluminum foil to form a film, and baking the film to form a positive electrode; and (c) forming a lithium ionic energy storage element by assembling the positive electrode, a negative electrode having a negative electrode active substance and a porous separate strip interposed between the positive electrode and the negative electrode, and filling an electrolyte into the porous separate strip.