Anion-Doped Inorganic Solids via Solid Electrolyte Lamination

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Current methods for producing anion-containing inorganic solid materials are limited in their ability to introduce arbitrary amounts of anion species and control anion composition, particularly in doping processes where only oxygen anions are introduced, and strategic control of anion composition is difficult.

Innovation Solution

A method involving laminating an electrode, a solid electrolyte layer, and a doping target layer, with a voltage applied to create a potential difference to introduce anions into the doping target layer, allowing for the introduction of various anion species in arbitrary amounts, including halide ions, and optionally forming oxygen vacancies in the material to be doped.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If conventional doping methods (reaction with anion source or mechanical milling) are used, then doping can be achieved, but the anion composition cannot be strategically controlled and arbitrary amounts of anion species cannot be introduced

Engineering Contradiction:

Improveanion composition controlVSAvoidanion species introduction flexibility

Core Design Contradiction:

Manufacturing precisionVSAdaptability or versatility

Solution Approach 1:

The system is segmented into distinct functional layers: electrode layer, solid electrolyte layer, and doping target layer. This segmentation allows independent control of each layer's composition and function, enabling precise control over anion doping processes and composition.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The invention changes the fundamental parameter of ion transport control from chemical reaction-based to electrochemical potential-based. By applying voltage to create potential differences, arbitrary amounts of anion species can be introduced and anion composition can be strategically controlled.

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If only oxygen anions are introduced through conventional methods, then doping can proceed, but multiple anion species cannot be introduced and anion composition cannot be diversified

Engineering Contradiction:

Improveanion species varietyVSAvoidanion composition control

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The solid electrolyte layer serves multiple functions: it acts as an ion source, provides ion transport pathways, and enables control over different anion species (oxygen, halide ions). This multi-functionality allows the same basic structure to introduce diverse anion species with precise compositional control.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The solid electrolyte layer acts as an intermediary between the electrode and the doping target layer. It mediates the transport of anion species from the electrode to the target material, enabling controlled introduction of various anion species while maintaining precision in composition control.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Adaptability or versatility

If voltage is applied to create potential difference for anion doping, then arbitrary amounts of anion species can be introduced, but device complexity increases due to additional electrode and solid electrolyte layer

Engineering Contradiction:

Improveanion introduction controlVSAvoidlaminate structure complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The invention adds the dimension of electrochemical potential control (voltage application) to the doping process. This new dimension enables arbitrary control over anion introduction amounts and species, outweighing the increased structural complexity of the laminate.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

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 production of anion-containing inorganic solid materials with controlled anion composition, enhancing the functionality of the materials by allowing the introduction of multiple anion species in specific amounts, thereby improving their properties such as ion conductivity and energy storage capabilities.

Implementation Method 1

a doping step of doping the material to be doped with an anion using the doping target layer as a reaction field by applying a voltage to the laminate

Methodology Applied

Scientific EffectIon conduction: Conduction (electrical)

Data Source

PatentUS20240356007A1Method for producing anion-containing inorganic solid material, device for producing anion-containing inorganic solid material, and anion-containing inorganic solid material

Publication Date: 2024.10.24 TOHOKU UNIV

AI summary

A method for producing an anion-containing inorganic solid material includes: a laminating step of forming a laminate including an electrode, a solid electrolyte layer, and a doping target layer containing a material to be doped; and a doping step of doping the material to be doped with an anion using the doping target layer as a reaction field by applying a voltage to the laminate to have a potential of the doping target layer to be higher than a potential of the electrode.