Korea Institute of Science and Technology research – Science

KIST Pioneers Next-Gen Energy Storage with Breakthrough Supercapacitor Technology

Faith Mcneil — Fri, 09 May 2025 04:14:42 +0000

In a remarkable stride towards the future of energy storage, researchers from the Korea Institute of Science and Technology (KIST) and Seoul National University have unveiled a game-changing supercapacitor technology that promises to revolutionize existing energy storage systems. Spearheaded by Dr. Bon-Cheol Ku and Dr. Seo Gyun Kim from KIST and Professor Yuanzhe Piao of SNU, this pioneering advancement centers on a unique fiber composition integrating single-walled carbon nanotubes (CNTs) and polyaniline (PANI), a conductive polymer. The implications of this research not only demonstrate enhanced performance in supercapacitors but could also redefine their role in various practical applications.

In traditional applications, supercapacitors have struggled to compete with batteries, particularly in terms of energy density. While they excel in rapid charging and higher power output, their relatively lower energy capacity has hindered widespread adoption. This limitation is critical in industries where long-lasting energy storage is paramount, such as electric vehicles and renewable energy systems, where performance under sustained load is vital. The innovative CNT-PANI composite fiber supercapacitor overcomes these barriers, combining the swift energy release capabilities of supercapacitors with improved energy density.

The design of the CNT-PANI composite fiber is inherently sophisticated, emphasizing how innovative material combinations can lead to superior performance. By chemically bonding the highly conductive CNTs with the process-friendly and cost-effective PANI, researchers have crafted a material structure that significantly improves the conductivity of the supercapacitor. The arrangement of the materials at the nanoscale is particularly noteworthy; it facilitates a more balanced conduction of electrons and ions. This ultimately translates into an energy storage system capable of faster charging and discharging without the typical trade-offs associated with practical implementations.

The operational stability of the newly developed supercapacitor is another significant advantage. In extensive testing, the device has consistently maintained optimal performance even after being subjected to more than 100,000 charge-discharge cycles, transcending previous records for durability. Such resilience makes these supercapacitors particularly suitable for high-voltage applications, showcasing their versatility in various challenging environments, including those found in transportation and advanced robotics.

One of the standout features of the CNT-PANI supercapacitor is its mechanical flexibility, allowing it to be rolled or folded without compromising performance. This property is crucial as the demand for adaptable energy storage solutions increases, particularly in wearable technology and other mobile applications. The ability to integrate these supercapacitors into flexible electronic devices expands the horizon for new product categories that can leverage low-weight and high-performance energy systems.

Moreover, the economic implications of this development cannot be overstated. The high production costs associated with single-walled carbon nanotubes have previously been a barrier to commercial viability. The KIST research team has effectively addressed this challenge by developing a composite that leverages the low-cost nature of PANI. Their innovative approach to mass production could facilitate large-scale application of this technology across diverse sectors, propelling a shift towards more sustainable energy solutions.

A significant benefit of enhancing supercapacitor technology lies in its potential to provide not only supplementary energy but also act as an alternative to conventional battery systems in electric vehicles and other mobility platforms. The fast charging capabilities of these supercapacitors may allow for rapid recharges during vehicle stops, leading to better operational efficiency and extended range. Additionally, because supercapacitors exhibit fewer degradation issues over extended periods, they could complement or even replace existing technologies reliant on traditional battery systems.

Beyond automobiles, drones and robotic systems are prime candidates for integrating this innovative supercapacitor technology. The enhanced energy storage capabilities could lead to longer operational times with compact systems, pushing the current boundaries of what remote-controlled and autonomous machines can achieve. From surveillance drones to delivery systems, the fusion of high-capacity, flexible energy storage can dramatically change the operational envelope of these technologies.

In the context of global sustainability goals, the development of the CNT-PANI composite fiber supercapacitor aligns perfectly with the transition towards a carbon-neutral economy. The desire for energy storage solutions that minimize environmental impact while maximizing performance is at the forefront of research agendas. This technology lays the groundwork for a multitude of applications that seek to reduce carbon footprints across various industries, promoting an eco-friendly trajectory.

As Dr. Bon-Cheol Ku of KIST points out, the ongoing research aims not only at improving the present technology but also at making strides towards industrialization and the production of ultra-high-performance carbon fibers. Transforming high-tech innovations into commercially viable products is a challenge many researchers face, but the potential to usher in new techniques for energy storage presents a thrilling opportunity for industrial partners interested in the energy sector.

In conclusion, the development of the CNT-PANI composite fiber supercapacitor heralds a new era in energy storage technology. With its combination of high energy density, enhanced durability, production feasibility, and adaptability to modern applications, this research stands poised to disrupt current practices and push the boundaries of innovation. The potential ramifications for electric vehicles, drones, and sustainable technologies are immense, providing a solid foundation for further exploration and advancement within the field.

Subject of Research: Development of high-performance supercapacitors using CNTs and PANI
Article Title: Nanocell-structured carbon nanotube composite fibers for ultrahigh energy and power density supercapacitors
News Publication Date: 15-Apr-2025
Web References: KIST Official Website
References: DOI link: 10.1016/j.compositesb.2025.112179
Image Credits: Korea Institute of Science and Technology (KIST)

Keywords

Supercapacitors, carbon nanotubes, polyaniline, energy storage, innovation, sustainability, electric vehicles, nanotechnology, high energy density, mass production, flexible electronics.

KIST Unveils Innovative Ultrasonic Wireless Battery Charging Technology

Faith Mcneil — Wed, 30 Apr 2025 13:41:02 +0000

In the quest for sustainable energy solutions, the realm of biomedical devices faces unique challenges, particularly when it comes to powering implantable electronics. Traditional methods of wireless charging, such as electromagnetic induction and radio frequency-based approaches, are limited in their scope of application due to a number of factors, including ineffective energy transfer efficiency through biological tissues and susceptibility to electromagnetic interference. As technology progresses, researchers are increasingly turning towards ultrasonic power transfer as a promising alternative. This innovative approach not only offers improvements over preceding technologies but also presents an exciting frontier for medical device functionality.

Recent developments in ultrasonic wireless charging systems have made it clear that this technology is poised to transform the ways in which medical devices can be powered. A collaborative research endeavor led by a team from the Korea Institute of Science and Technology (KIST), under the guidance of Dr. Sunghoon Hur, alongside Professor Hyun-Cheol Song from Korea University, has paved the way for significant breakthroughs in this field. The focus has been on creating a biocompatible ultrasonic receiver capable of maintaining performance through mechanical deformation, which is a significant advancement given the complex environments in which medical devices operate.

Conventional wireless power transmissions are often plagued by restrictions that limit their effectiveness—short transmission distances and low efficiency when interacting with biological tissues are prominent among these issues. In contrast, ultrasonic technology leverages sound waves to transfer energy, with the advantage of minimal tissue absorption, thereby allowing for enhanced energy transfer capabilities in not only implantable devices but also skin-adherent technologies.

This pioneering work culminated in the design of a state-of-the-art ultrasonic receiver. The research emphasized high power conversion efficiency through the adoption of advanced piezoelectric materials, paired with an innovative structural design that allows for flexibility and biocompatibility. This new design philosophy enables the receiver to conform to the unique contours of the human body, producing stable power conversion even under bending and deformation.

By successfully transmitting power underwater and through human tissue, the researchers have demonstrated that it is viable to transmit 20 mW of energy at a distance of 3 cm in water and approximately 7 mW at a depth of 3 cm from the skin’s surface. This level of power output is significant—it is sufficient to continuously power various low-energy wearable devices as well as essential medical implants, effectively eliminating the need for invasive surgeries or frequent battery replacements.

The implications of this research extend far beyond simple battery charging; they herald a new era for medical technology. The ability to provide consistent, reliable power to devices such as pacemakers, neurostimulators, and other wearable sensors without the need for physical connections or bulky batteries opens up endless possibilities for medical applications. Moreover, the technology is equally poised to influence the field of underwater electronics, enhancing the operational capabilities of underwater drones and marine sensors that require long-term energy solutions.

Dr. Sunghoon Hur’s insights into the research highlight the transformative potential of ultrasonic wireless power transmissions. He expressed optimism regarding the future applications of their research, emphasizing the ongoing commitment to miniaturization and commercialization, which will significantly contribute to practical applications of this technology in everyday life. The ability to safely and efficiently harness energy through ultrasound could redefine the standards for implantable health technologies and their integration into patient care.

With support from the Ministry of Science and ICT and the National Research Foundation of Korea, this innovative research has been well-received within the scientific community. The findings were published in the prestigious journal Advanced Materials—a nod to their significance within the materials science sector. Such recognition underscores both the novelty and importance of this work, marking it as a potential key player in shaping the future of biomedical engineering.

As we look to the horizon, it is clear that the transition from traditional power sources to innovative wireless solutions like ultrasound technology is already in motion. The advancements in biocompatible materials designed for ultrasonic energy transfer not only assure ongoing patient safety but also provide unprecedented design flexibility for creating more effective medical devices. The future seems promising, and the continuous pursuit of innovation will undoubtedly lead to profound changes in how we approach medical technology and patient wellness on a global scale.

In conclusion, with healthcare increasingly moving towards more advanced and personalized solutions, the implications of efficient wireless power systems such as those demonstrated by KIST cannot be overstated. As researchers push the boundaries of what’s possible, the prospects for ultrasonic power transfer technology in enhancing the capabilities of implantable medical devices and beyond remain boundless.

Through these advancements, we stand on the brink of an energy revolution within medicine, one that will enable machines to operate autonomously and seamlessly integrate into the lives of patients without the burdens of traditional energy limitations. This research, by breaking ground in ultrasonic wireless power, represents a considerable step towards not only making medical devices more effective but also significantly enhancing the quality of care provided to patients in need.

Subject of Research: Ultrasonic Wireless Charging for Medical Devices
Article Title: A Body Conformal Ultrasound Receiver for Efficient and Stable Wireless Power Transfer in Deep Percutaneous Charging
News Publication Date: March 26, 2025
Web References: KIST Website
References: Advanced Materials (IF: 27.4, top 1.9% in JCR materials)
Image Credits: Korea Institute of Science and Technology (KIST)

Keywords

Ultrasonic power transfer, Wireless charging, Medical devices, Biocompatibility, Piezoelectric materials, Energy efficiency, Implantable electronics, Wearable technology, KIST, Advanced Materials.