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Category: 3D printing

Team uses 3D printing to develop zinc-ion hybrid battery with seven times more energy

Storing solar and wind energy to meet the increasing power needs of the electrical grid calls for devices that can deliver power quickly, recharge quickly and last for decades at low cost. A new study led by UCLA has uncovered a technology that could meet all these criteria: a zinc-ion hybrid battery with a 3D-printed electrode that stores more than seven times the charge of similar hybrids.

Energy storage based on zinc instead of lithium would be cheaper and more sustainable because zinc is 100 times more abundant, easier to mine and easier to recycle.

“The future of energy storage won’t be defined by a single technology,” said co-corresponding author Maher El-Kady, an assistant researcher in UCLA College’s chemistry and biochemistry department. “At some point, we will need to look for something to complement the current options for grid-scale energy storage. What we’ve done in this study essentially gives us zinc-ion hybrid devices that can store nearly one order of magnitude higher capacity.”

Blame the model, not the machine—better data helps 3D-printed metamaterials match predictions

Additive manufacturing, such as 3D printing, provides an excellent opportunity to design metamaterials: materials with an engineered structure that leads to desired properties such as, for instance, resistance to vibrations. However, a major challenge was that the predicted metamaterial response often failed to match real-world behavior.

Researchers at the University of Groningen have now shown that the unexpected behavior of 3D-printed metamaterial structures is not due to structural defects, as was commonly believed, but that the material simply needs to be properly characterized to obtain models with high predictive accuracy. The results were published in Materials Horizons on June 3, 2026.

Solid-state material turns visible light into high-energy UV at sunlight intensity, expanding solar energy potential

Two cups of warm water don’t make one cup of boiling water. But in the quantum world, multiple low-energy photons can combine to produce a single, higher-energy photon.

A research team at Kyushu University has developed a solid-state molecular material that “upgrades” visible light into ultraviolet (UV) light under ordinary outdoor sunlight, achieving a conversion efficiency of 1.9%. The study is published in Nature Communications.

Harsh UV light is something most people try to avoid in summer, yet it is indispensable in fields ranging from air purification and resin curing in 3D printing to gel hardening in dental fillings and nail art. Despite its importance, UV accounts for only about 6% of the sunlight reaching Earth’s surface, with only a fraction of that being practically usable.

A low-tech solution to the 6G problem—metacrystal panels offer cheap way to guide wireless signals around corners

A passive 3D-printed panel could redirect wireless signals around corners without electronics or power. The metacrystal design can handle multiple incoming waves and different frequency bands, offering a lower-cost option for hard-to-reach indoor spaces.

Basements, tunnels, large buildings—a weak Wi-Fi or mobile signal in these hard-to-reach places is frustrating. The usual solution is to add more electronics like routers, repeaters and base stations. Yet, as we move towards a 6G mobile network, this kind of complex infrastructure can be unsustainable and prohibitively expensive. Higher-frequency channels of 6G communications aim to provide vastly more data bandwidth than the current 5G, but those channels are more easily blocked by walls, people and other obstacles.

To tackle this, researchers at Aalto University have developed a new solution in the form of metacrystals: passive, 3D-printed smart panels that can shape wireless signals without electronics, a power supply or active tuning. The paper, “Metacrystals: Inversely-designed 3D-printed intelligent panels for 6G communications” is published in Nature Communications.

“When a room is too dark, you can bring in more lamps—or use simple mirrors to guide the already available light. This is what these metacrystals do, but with radio waves,” explains doctoral researcher Mahdi Asgari. “Unlike previously proposed single-layer intelligent surfaces, these volumetric metacrystals can be designed to control multiple incoming signals or frequency bands independently—a key requirement for realistic wireless communication.”

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