Why Bismuth‑Silicate Glass Can Hold More Electrical Energy Than Any Other Glass

What is it about?

We studied a special bismuth‑silicate glass that can store much more electrical energy than ordinary glass. Using state‑of‑the‑art techniques, such as X‑ray and neutron scattering, X‑ray absorption, and NMR, we create a detailed picture of how its atoms are arranged. We found that bismuth atoms sit in strongly uneven environments and form small clusters separated by silica chains. This unique atomic structure makes the material highly polarizable, helping us explain why this glass shows exceptionally high dielectric performance.

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Why is it important?

No other known glass shows such a large ability to store electrical energy. Understanding why this glass behaves so differently helps us link its unique atomic structure to its exceptional properties. Our approach is practical: by combining multiple cutting‑edge experimental methods with advanced modeling, we were able to reveal both the local and medium‑range atomic structure. These insights may guide the design of new high‑performance glasses for future electronic and energy‑storage applications.