Materials

Machine learning via artificial neural networks coupled with density functional theory and experiments for thermodynamic optimization of high-entropy alloys for hydrogen storage at room temperature

Shivam Dangwal, Anuj Kumar, S. M. A. Hashemi, K. G. Prashanth

Featured June 12, 2026

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Simply

By combining smart computer predictions with lab tests, the study found new metal mixes called high-entropy alloys that can store hydrogen fuel safely and easily at room temperature.

In depth

The study introduces a novel approach for designing high-entropy alloys (HEAs) for room-temperature hydrogen storage by integrating artificial neural networks (ANN) with density functional theory (DFT) and experimental validation. This multi-pronged strategy allows for rapid prediction of hydride formation enthalpy, identifying optimal HEA compositions like Ti

_{x}

_{2 - x}

VCrMnFe, which exhibit desirable thermodynamic properties and fast kinetics.

Key Takeaways

1
The paper successfully integrates machine learning (ANN) with DFT and experiments to accelerate the design and optimization of high-entropy alloys for hydrogen storage.
2
A novel AB-type HEA system, Ti $_{x}$ Nb $_{2 - x}$ VCrMnFe, is identified, where increasing titanium content (decreasing niobium) leads to more negative hydride formation enthalpies suitable for room-temperature storage.
3
The study demonstrates that ANN models, particularly with hybrid outlier removal, provide accurate predictions of formation enthalpy, showing better extrapolation capabilities than Gaussian Process Regression for this material system.

Conceptual Flow

HIGH LEVEL

Methodology: Smart Material Design

The researchers used a three-part strategy: computer predictions, detailed simulations, and real-world experiments to find new materials.

Material Ideas

Predict with AI

Promising Recipes

Simulate Properties

Test in Lab

Results: Better Hydrogen Storage

They discovered specific metal mixes that store hydrogen well at room temperature, making them useful for clean energy.

Old Storage

Needs Heat

New Material

Stores Hydrogen

Room Temp Ready