Breakthrough in Quantum Battery

A team of scientists from the Royal Melbourne Institute of Technology (RMIT) and the Australian research organization CSIRO has made a major breakthrough in the development of so-called quantum batteries. By designing a new device architecture, the researchers managed to increase energy storage time by up to a thousandfold—without sacrificing the unique fast-charging properties of these systems.

Quantum Batteries – The Future of Energy Storage

Unlike conventional batteries, quantum batteries do not rely on chemical reactions but rather on quantum mechanical phenomena. One of the most promising features under investigation is the so-called superabsorption effect, which allows devices to charge incredibly quickly. However, this same property has until now caused rapid discharge (superradiance), limiting the technology’s practical applications.

The new research, published in the prestigious journal PRX Energy, offers an innovative solution to this issue: the use of molecular triplet states, which—unlike the previously used bright singlet states—do not emit light and are considered “dark states.”

Microcavities and Polariton Resonance

The team built five experimental prototypes using a multilayered microcavity structure. The device included a donor layer (Rhodamine 6G dye), responsible for absorbing light, and an acceptor layer (a PdTPP* molecule), which stores energy in the triplet state.

The energy transfer mechanism relied on triplet-polariton resonance, enabling effective transfer of energy into long-lived molecular states. Although the current version of the battery functions optically, the researchers emphasize that designing a version capable of releasing energy as electric current is within reach of future studies.

“While our contribution is just one piece of the puzzle, our device already stores energy far more efficiently than previous models,” said Daniel Tibben, an RMIT PhD student and co-author of the study.

Professor Daniel Gómez from RMIT, also a co-author of the publication, noted that the research represents a milestone toward the practical application of quantum batteries. “We’re still a long way from a full consumer-grade device, but our experiment paves the way for building more efficient versions,” he said.

Dr. James Quach from CSIRO, a pioneer of experimental quantum battery research in Australia, pointed out that the country remains a global leader in the field.

Potential Applications and Next Steps

While a lifetime extended to microseconds may seem negligible in everyday terms, in the quantum physics realm it marks a significant leap and proof of concept. Quantum battery technology holds the potential to revolutionize power systems at the microscale—from medical devices to satellite power units and quantum computer components. In the future, it may also boost the efficiency of solar cells.

The project was supported by the Australian Research Council, the European Union, and RMIT University through the Vice-Chancellor’s Senior Research Fellowship program.

Article in polish: Przełom w badaniach nad bateriami kwantowymi

Source: ess-news.com