Breathing Crystals: Transforming Clean Energy & Electronics

A team of engineers from prestigious universities successfully created a crystal that can make structural adjustments in real time via an oxygen molecule manipulation approach. These breathing crystals could unlock major advancements in thermal building materials, aerospace, computing, and clean energy systems. Here’s what you need to know

Advanced Materials That Breathe

Scientists continue to research materials that breathe via oxygen vacancy engineering efforts. These researchers utilize materials like Transition Metal Oxides (TMOs) that can be modulated to different states by removing oxygen atoms from their composition.

These states possess different characteristics, enabling scientists to tune programmable functionalities. As such, it’s possible to enhance or decrease catalytic, electronic, and photocatalytic capabilities on a microscopic scale. These tunable parameters have made breathable materials vital in future technologies like energy storage, catalysis, superconductivity, and electronic devices.

Cobalt Oxides

The most common type of TMO combines cobalt- and iron-based perovskites. Notably, perovskites are nanoscale crystal structures that feature a shape that makes them ideal for elemental creation. Engineers use these materials in TMOs because they have strong structural support and can support several structural phases.

Problems with Cobalt Oxides

Cobalt Oxides are not without their limitations. For one, these materials are externally fragile and expensive to create. As such, they can’t be used in more rugged applications without the need for additional countermeasures to prevent damage.

Another problem with the Cobalt oxide approach is that these structures can only achieve their separate states under high temperatures or other specific conditions. Meeting these conditions can add to the overall costs, size, and limitations of their intended applications. Additionally, these conditions can lead to decomposition, reducing performance.

Breathing Crystals Study

Recognising these limitations, a team of engineers set off to find a more stable and flexible alternative to Cobalt Oxide-based TMOs. Their work, “Selective reduction in epitaxial SrFe0.5Co0.5O2.5 and its reversibility,” published¹ in the journal Nature Communications, introduces a novel TMO composition that can support a broader spectrum of oxygen stoichiometries.

As part of this approach, the engineers created thin films of metal oxide from strontium, iron, and cobalt. The SrFe0.5Co0.5O2.5 films were then modulated via different gas environments. The team notes that their crystals produce a breathing action, releasing and absorbing oxygen like lungs.

Source – Pusan National University, Korea

Unlike traditional cobalt-oxide reduction methods, the iron remained inert, providing a solid structure to the crystals and eliminating structure degradation. Additionally, element-specific reduction methods enable engineers to tune to structurally distinct oxygen-deficient phases that exhibit different qualities.

The team noted that the oxygen vacancies at the tetrahedral sites work to stabilize the structure. This structural rigidity was increased further as the iron modified the local coordination environment, blocking Co-induced structural decay.

Original Form

The scientists were impressed when they saw that the crystals could return to their original form with the introduction of oxygen. This low-cost and controllable method opens the door for several applications across many tech sectors. They also documented how the iron reduced the chances of defective perovskite, brownmillerite, and oxygen-rich perovskite phases forming during the process.

Breathing Crystals Study Test

To test their theory, the scientists created brownmillerite (BM) SFCO thin films. The scientist then initiated reactions using a 3% H2/Ar forming gas (FG) for different time periods. This gas reacts with hydrogen, causing oxygen atoms to be released from the lattice structures.

During the process, the engineers employed a variety of testing strategies. The use of optical spectroscopy revealed enhanced transparency and other key details. For example, the team noted an absorption edge shift of 1.65 eV in the Co L-edge upon reduction.

Redox Testing

To document the transformation back to their original structural state, the engineers conducted situ diffraction and transport measurements across phases. The measurements confirmed out-of-plane lattice expansion, indicating gradual oxygen vacancy formation.

Key Findings from Breathing Crystals Study

The tests demonstrated how Fe plays a crucial role in maintaining structural coherence and preventing decomposition in TMOs. It also demonstrates how preplanned redox control enables the creation of functionally distinct oxygen-deficient phases.

The study revealed that the Fe remained chemically stable under several reducing conditions. Confirming that its presence can strengthen structural support by preventing apical oxygen removal. This process results in the formation of a stable oxygen-deficient phase instead of an unstable one.

Breathing Crystals Benefits

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There are many benefits that the breathing crystals study brings to the market. For one, these crystal reactions occur under milder circumstances. This approach eliminated the need for high-temperature approaches or other more expensive and complicated gas environment manipulation methods.

Stability

The biggest benefit of this research is that it creates a new stable Fe-based TMO that can convert phases with full redux capabilities. The stability of this new structure will help to drive future innovations in nanotech, aerospace, and other applications.

Breathing Crystals Real-World Applications & Timeline:

There are many applications for breathing crystal technology. These tiny structures are at the core of some of today’s most advanced and important innovations. From clean energy to electronics and more, there are several applications for breathing crystals worthy of note.

Eco-friendly building materials

Reports show that climate control systems, like air conditioners and heaters, remain one of the biggest draws of power globally. This study opens the door to eco-friendly smart materials that can adjust automatically to provide comfort without electricity.

There are currently several projects in the works that combine innovative materials with structural design to reduce the need to depend on electric-powered temperature control measures. A perfect example of this concept would be smart windows. These purpose-built windows promise to automatically adjust to increase or decrease heat flow depending on your settings.

Clean Energy Technologies

Another application for breathing crystals is in next-generation fuel cells. Fuel cells offer clean energy and portability. Recently, engineers have created solid oxide fuel cells, which produce electricity from hydrogen with minimal emissions. In the future, breathing crystal options could provide more stability and redox capabilities to these products.

Smart Thermal Devices

As you delve deeper into the implications of this technology, it’s easy to see that this work could help to power the smart thermal device movement. These items can automatically sense temperature changes and adjust to ensure performance in harsh environments. For example, visualize advanced computer wafers that can perfectly manage thermal wear.

Breathing Crystals Timeline

It will be around 7-10 years before this technology reaches the market. There could be faster integration in the green energy sector, as it has strong international support with the UN seeking to hit net carbon-zero emissions in the coming decades.

Breathing Crystals Researchers

The breathing crystals study was hosted at Pusan National University, Korea, and Hokkaido University, Japan. The paper lists Professor Hyoungjeen Jeen and Professor Hiromichi Ohta as the primary authors. They had assistance from Joonhyuk Lee, Yu-Seong Seo, Krishna Chaitanya Pitike, Gowoon Kim, Sangkyun Ryu, Hyeyun Chung, Su Ryang Park, Sangmoon Yoon, Younghak Kim, and Valentino R. Cooper.

The breathing crystals study received financial and material support from the Research Institute for Electronic Science, Hokkaido University, Japan, and a National Research Foundation of Korea (NRF) grant funded by the Korean government.

Breathing Crystals Future

The future for breathing crystal study appears bright. There is strong demand for these materials as they are what’s needed to propel forward several high-tech industries, including computing and aerospace. The engineers noted that their work opens the door for a new phase space for programmable oxygen-deficient materials.

Investing in Material Sciences

There are many companies in the material science sector. These manufacturers create the high-tech material that keeps your computer running smoothly, satellites in the sky, and much more. Here is one company that has remained innovative and helped to push the adoption of next-gen material sciences.

JinkoSolar

JinkoSolar (JKS -3.66%) is a leading provider of high-efficiency photovoltaic panels,  silicon wafers and ingots, energy storage systems, and advanced materials like solar micro-crystalline silicon. The firm entered the market in 2006 and is based in China.

The company’s founders, Li Xiande, Kangping Chen, and Xianhua Li, sought to provide more powerful and resilient solar options to the market. Notably, the company found immediate success, and by 2010, they were listed on the NYSE.

JinkoSolar continues to push for more powerful solar panels, which saw major improvements starting with the introduction of their Tiger Pro series and ultra-high power 700W+ series options in 2021. Today, the firm is an industry leader that has operations in China, the US, Southeast Asia, and the Middle East. Those seeking a reputable stock that provides exposure to several high-tech sectors should do more research into JinkoSolar shares.

Latest JinkoSolar (JKS) Stock News and Developments

Breathing Crystals Study | Conclusion

The breathing crystals study opens the door for more advanced material sciences moving forward. The team’s unique approach reduces costs and improves performance. It also demonstrates how small changes can create massive improvements when dealing with TMOs. Now, the team will seek to expand on their work and secure industrial partnerships to bring their discovery to market.

Learn about other cool material science breakthroughs here.

References:

^{1. Lee, J., Seo, YS., Pitike, K.C. et al. Selective reduction in epitaxial SrFe_0.5Co_0.5O_2.5 and its reversibility. Nat Commun 16, 7391 (2025). https://doi.org/10.1038/s41467-025-62612-1}