Boron Nitride Activation for Proton Conduction
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Solution Overview
Problem
Existing activated boron nitride materials have limited proton conduction capabilities, which hinder their effectiveness in fuel cells, electrolyzers, and accumulators.
Innovation Solution
A method to activate boron nitride by exposing it to H3O+ ions and/or OH hydroxyl radicals to form B—OH and NH bonds, followed by elimination of the fluid, enhancing proton conduction through the creation of NH2+ and BOH2+ groups, and optionally using an electric field and specific solutions or gases like steam.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If boron nitride is used in fuel cells, electrolyzers, or accumulators, then it provides structural stability and chemical inertness, but its proton conduction capability is insufficient
Solution Approach 1:
The patent applies parameter changes by modifying the chemical composition of boron nitride through exposure to H3O+ ions and OH hydroxyl radicals. This creates B-OH and NH bonds, transforming the material from chemically inert to proton-conductive while maintaining structural stability. The concentration of H3O+ ions and OH radicals can be controlled to achieve desired proton conduction levels.
Solution Approach 2:
The patent creates a composite structure within boron nitride by incorporating B-OH and NH bonds alongside the original BN structure. This composite approach allows the material to simultaneously exhibit the structural stability of boron nitride and the proton conduction properties of hydroxyl-containing groups, resolving the contradiction between inertness and conductivity.
2Productivity
If the concentration of H3O+ ions and OH radicals is increased to improve activation rate, then proton conduction improves, but the complexity of the activation process increases
Solution Approach 1:
The patent uses H3O+ ions and OH radicals as intermediary species to transfer protons to the boron nitride structure. These intermediaries facilitate the activation process by forming B-OH and NH bonds, enabling controlled modification of the material without requiring direct contact with complex activation equipment or extreme conditions.
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
Significantly improves proton conduction in boron nitride, increasing its conductivity from 10−5 to 10−2 Siemens/cm, making it suitable for use in fuel cells, electrolyzers, and accumulators.
Implementation Method 1
exposing boron nitride to a fluid enabling H3O+ ions and/or —OH hydroxyl radicals to be provided and creating B—OH bonds and/or NH bonds in the boron nitride
Implementation Method 2
A proton may easily be grafted on the oxygen of the hydroxyl and/or on the nitrogen of NH, so that proton conduction of boron nitride is improved
Implementation Method 3
the boron nitride and the fluid may be subject to an electric field, for example an electric field comprised between 15 and 40,000 V/m
Data Source
AI summary
A method of activating boron nitride comprises exposing the boron nitride to a fluid enabling —OH hydroxyl radicals and/or H3O+ to be delivered and creating B—OH bonds and/or NH2 bonds in the boron nitride, and eliminating the fluid and recovering the activated boron nitride.