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In a recent report from Singapore's *Lianhe Zaobao*, researchers from Nanyang Technological University (NTU) have unveiled a groundbreaking flexible power supply that can be stretched, bent, and even tailored to fit different shapes. This innovation is expected to one day replace traditional batteries in wearable devices such as smartwatches, heart rate monitors, and smart glasses.
Developed over two years by a team at NTU, this new supercapacitor is unlike conventional ones on the market. It behaves more like a fabric—easily manipulated without losing its energy storage capabilities. This flexibility makes it ideal for integration into clothing or wearable tech, where rigid components often pose limitations.
Most existing capacitors are manufactured in fixed designs, making them less adaptable to various applications. The new design, however, uses reinforced manganese dioxide nanowire composites infused with carbon nanotubes and nanocellulose fibers. This unique composition allows the capacitor to endure multiple stretches during production, maintaining its performance.
Professor Chen Xiaodong, who led the research, explained that supercapacitors function similarly to batteries but charge much faster. He mentioned that depending on the size, charging could take anywhere from seven to eight minutes now, with future improvements aiming to bring that down to under a minute.
When woven into a honeycomb structure, the capacitor can store up to three times more energy than a standard one. Moreover, after 10,000 cycles of stretching and compressing, it retains about 98% of its original capacity, showing remarkable durability.
Dr. Luo Xianjun, a researcher involved in the project, highlighted that these capacitors are not only efficient but also "plug-and-play," meaning they can be easily integrated into wearable systems. He described them as a promising next-generation energy storage solution with high scalability.
In experiments, the capacitors were attached to elbows and continued to provide stable power even when the arms moved constantly. They successfully transmitted signals to wearable devices, including heart rate trackers, proving their reliability in real-world conditions.
Chen added that using current manufacturing techniques, the capacitors can be mass-produced at a very low cost—just a fraction of a cent per square centimeter. The team has already filed a patent for the technology and is in discussions with potential industry partners for commercialization.
Looking ahead, the researchers are exploring ways to develop a three-dimensional version of the supercapacitor. Their goal is to combine this flexible power source with wearable health or fitness sensors, opening the door to smarter, more integrated wearable technology in the future.