Wang succeeds Judy Jeevarajan, Ph.D., who will remain with UL Research Institutes as vice president and distinguished scientific advisor. In his new role, Wang will direct research strategy and operations at the Electrochemical Safety Research Institute, an organization focused on understanding why electrochemical energy-storage systems fail and how those failures can be prevented. The institute investigates the links between battery chemistry, mechanical design, electrical control, manufacturing quality, and real-world operating conditions. Its work is intended to influence safer products, testing methods, engineering practices, and standards as energy systems become more densely packed and increasingly dependent on rechargeable batteries.

Before joining UL Research Institutes, Wang spent more than three decades at Pennsylvania State University, where he served as the William E. Diefenderfer Chair in Mechanical Engineering, professor of mechanical engineering, chemical engineering, and materials science and engineering, director of the Electrochemical Engine Center, and co-director of the Battery and Energy Storage Technologies Center. His research career has covered the full battery-development chain, from fundamental electrochemical reactions and heat generation to manufacturing, fast charging, system integration, and commercialization. That breadth has made him a prominent figure in a field where the performance of a battery cannot be separated from its thermal behavior, structural integrity, production consistency, and control software.

One of Wang’s most important contributions has been the development of electrochemical-thermal modeling methods for batteries. These models combine the movement of ions and electrons inside a cell with the heat produced by electrochemical reactions, electrical resistance, and transport limitations. As a battery charges or discharges, local variations in current density, temperature, and chemical concentration can create areas of stress that are invisible from the outside. Electrochemical-thermal models allow researchers to predict how these internal conditions evolve, helping engineers design cells and battery packs that operate within safer limits. The approach has influenced battery development across transportation, consumer electronics, defense, and stationary energy storage.

Wang also invented a self-heating, all-climate battery designed to maintain performance in extremely cold conditions. Conventional lithium-ion batteries can lose power at low temperatures because ion transport slows and the internal resistance of the cell rises. Charging a cold battery can be particularly hazardous, as lithium plating may occur on the anode surface instead of lithium ions being safely stored within the electrode structure. Wang’s technology uses the battery’s own electrical energy to generate controlled internal heat, bringing the cell rapidly to an operating temperature at which it can deliver power and accept charge more efficiently. The technology enabled electric buses to operate during the 2022 Winter Olympics and has since been commercialized for transportation, defense, and energy-storage applications.

His work on ultrafast charging also drew international attention after being recognized by The Guardian as one of the world’s leading science stories of 2022. Fast charging is not simply a matter of supplying more electrical current. High charging rates can produce heat, accelerate unwanted chemical reactions, and cause lithium ions to accumulate as metallic deposits on the anode. These deposits can reduce capacity and, in extreme cases, create internal pathways that trigger a short circuit. Wang’s research has explored how electrode architecture, thermal management, charging protocols, and cell chemistry can be coordinated to reduce these risks while shortening the time required to recharge a battery.

More recently, Wang has focused on lithium-metal and solid-state batteries, two technologies widely viewed as possible successors to today’s dominant lithium-ion systems. Lithium-metal anodes can store substantially more charge by replacing conventional graphite, potentially increasing energy density and extending the range of electric vehicles. However, lithium can form needle-like structures known as dendrites during charging. If dendrites penetrate a separator and reach the opposite electrode, they can cause an internal short circuit. Solid-state batteries replace the flammable liquid electrolyte used in many conventional cells with a solid ion-conducting material, but they introduce their own challenges, including interfacial resistance, cracking, contact loss, and mechanical instability. Wang’s research has examined the safety mechanisms behind these emerging systems and contributed to the design of batteries intended to be intrinsically safer rather than merely protected by external controls.

“Dr. Wang is among the world’s foremost authorities on battery technology and electrochemical energy systems,” said James J. Hudgens, Ph.D., president and chief executive officer of UL Research Institutes. Hudgens said Wang’s scientific leadership, entrepreneurial approach, and focus on battery safety made him especially qualified to lead the Electrochemical Safety Research Institute as demand for energy storage accelerates. Wang said batteries are fundamental to the future of transportation, infrastructure, and energy systems, and that he would work with colleagues across UL Research Institutes to advance research that improves the safety, reliability, and sustainability of energy technologies worldwide. His responsibilities will include expanding experimental and computational capabilities and strengthening partnerships with industry, government, universities, and standards-development organizations.

Wang’s appointment also brings an unusually extensive record of invention and technology transfer to a research institute whose findings are intended to inform public safety. He is a fellow of the National Academy of Inventors, the Electrochemical Society, and the American Society of Mechanical Engineers, holds approximately 140 issued patents, and has authored research cited more than 50,000 times. He earned bachelor’s and master’s degrees in mechanical engineering from Zhejiang University and a doctorate in mechanical engineering from the University of Iowa. Throughout his career, he has founded companies and helped move laboratory discoveries into commercial products. At UL Research Institutes, that combination of fundamental science, engineering, and commercialization could help close the gap between promising battery concepts and the safety requirements of technologies deployed at global scale. The institute, part of the nonprofit UL Research Institutes, conducts independent research across electrochemical safety, fire safety, chemical insights, materials discovery, digital safety, and research education, publishing findings openly to support safer standards, policies, products, and communities.

Subject of Research: People

Article Title: Battery Safety Pioneer Chao-Yang Wang Appointed to Lead UL Research Institutes’ Electrochemical Safety Research Institute

Web References: Chao-Yang Wang, Ph.D.; Electrochemical Safety Research Institute; James J. Hudgens, Ph.D.

Image Credits: UL Research Institutes

Keywords

Battery safety, electrochemical energy storage, lithium-ion batteries, lithium-metal batteries, solid-state batteries, ultrafast charging, thermal runaway, battery research, electric vehicles, energy storage safety

The need for safer battery technologies has never been more pressing. As lithium-ion batteries have become more prevalent, incidents of thermal runaway and subsequent fires have raised alarm among manufacturers and consumers alike. Thermal runaway occurs when the battery experiences an uncontrollable increase in temperature, leading to potential ignition of the electrolyte. Understanding the thermal properties and flammability of electrolyte solvents is paramount to mitigating these risks. Gu and Kang’s investigation centers on evaluating the fire safety of the solvent mixture, thereby contributing to the ongoing efforts to design more stable and safer lithium-ion battery systems.

In their research, Gu and Kang employed both experimental validation and theoretical modeling. The combination of these approaches enabled a comprehensive analysis of the fire safety attributes of the ternary solvent system. By utilizing experimental techniques, the researchers were able to quantify the ignition temperatures of the different solvent combinations, identifying the conditions under which thermal runaway might occur. Meanwhile, their theoretical modeling results provided insights into the molecular interactions and behaviors of the solvents at elevated temperatures, offering a deeper understanding of the underlying mechanisms at play.

One of the critical findings of their research is the significant impact of the solvent mixture on the overall ionic conductivity of the electrolyte. Ionic conductivity is a central property that affects the performance of lithium-ion batteries, influencing charge and discharge rates. The researchers discovered that by optimizing the ratios of EC, DEC, and DMC within the ternary system, they could enhance the ionic conductivity, leading to more efficient battery operation. This aspect of battery design is crucial for applications requiring high energy output, such as electric vehicles that demand swift acceleration and robust performance.

The implications of this research extend beyond just improved performance. As the scientific community pushes for greener technologies, the environmental impact of lithium-ion batteries is increasingly scrutinized. Gu and Kang’s work highlights the potential for using less hazardous solvents, thereby making a strong case for the adoption of eco-friendlier alternatives without sacrificing performance. Their findings may pave the way for developing rechargeable battery systems that are not only safer but also more sustainable through the judicious selection of electrolyte components.

Furthermore, the study underscores the importance of a multi-faceted approach to battery research. The integration of experimental data and theoretical modeling provides a more nuanced understanding of how different components interact and affect overall battery performance. This methodological synergy is essential in addressing the complex challenges faced by researchers and engineers working in the field of energy storage. By honing in on the interactions of solvents, researchers can formulate design strategies that enhance not only the efficiency of energy storage solutions but also their safety profiles.

The advancements resulting from Gu and Kang’s research are important not just for lithium-ion technology but also for the future of battery innovations. In an era marked by the rapid advancement of electric vehicles, renewable energy integration, and extensive electrification, there is a pressing necessity for batteries that can withstand demanding operational environments. The knowledge garnered from studying the fire safety of electrolyte solvents equips engineers with the necessary tools to tackle imminent challenges in battery safety and efficiency. Moving forward, these insights may catalyze further innovations, enhancing the performance of battery technologies for a wide array of applications.

In examining the specific solvent compositions, the study reveals nuanced interactions that may contribute to both improved ionic conductivity and reduced flammability. The careful selection and ratio adjustment of EC, DEC, and DMC offer intriguing insights into how minor variations can significantly affect fundamental battery performance parameters. As such, this research provides essential guidance for the formulation of next-generation battery electrolytes, reaffirming the importance of tailored solvent systems.

The study’s findings also align with a broader trend in battery research aimed at increasing the safety and stability of lithium-ion technology. As regulatory pressures increase, along with consumer expectations for safer battery systems, the insights offered by Gu and Kang contribute to a global dialogue focused on identifying reliable safety measures. The active pursuit of knowledge in this area is indicative of the industry’s commitment to prioritize safety while pushing the boundaries of energy storage technology.

Moreover, the collaboration between experimentalists and theorists underscores a growing recognition within scientific communities that interdisciplinary efforts yield rich dividends. As researchers from various backgrounds come together to tackle issues around energy storage, the collective expertise fosters greater innovation and creativity. The groundbreaking work of Gu and Kang is emblematic of this collaborative ethos, highlighting how diverse skill sets can converge to address complex technical challenges effectively.

As society pivots towards innovation in sustainable technologies, the work of Gu and Kang represents a beacon of hope in the quest for improved battery systems. Their thorough analysis of ternary electrolyte solvents provides crucial information that could guide manufacturers towards delivering safer, more efficient lithium-ion batteries. With these insights, stakeholders throughout the energy storage industry can work towards meeting the evolving demands of a changing world, seeking to align safety with performance and environmental responsibility with technological advancement.

In summary, Gu and Kang’s research stands as a vital contribution to the ongoing dialogue concerning safety and performance in lithium-ion batteries. Their findings not only underscore the importance of electrolyte composition but also highlight the broader impact of such innovations on future battery technologies. By illuminating the intricate balance between performance and safety, this study invites further research into innovative solutions that can elevate the standards of battery systems, ultimately leading to a more sustainable energy landscape.

As we continue to navigate complex technological challenges ahead, the importance of fire safety and ionic conductivity in battery solvents cannot be understated. The work of Gu and Kang thus remains imperative, serving as a foundation for future research that aims to merge safety with efficiency, all while embracing the environmental imperative that guides our energy choices. In an era where the stakes have never been higher, their pioneering exploration of ternary electrolyte solvents marks an important step toward achieving a safer future for energy storage systems.

Subject of Research: Fire safety and ionic conductivity in lithium-ion battery electrolyte solvents.

Article Title: Fire safety and ionic conductivity of ternary electrolyte solvents (EC, DEC, and DMC) in lithium-ion batteries: experimental validation and theoretical modeling.

Article References:

Gu, B., Kang, C. Fire safety and ionic conductivity of ternary electrolyte solvents (EC, DEC, and DMC) in lithium-ion batteries: experimental validation and theoretical modeling.
Ionics (2025). https://doi.org/10.1007/s11581-025-06762-8

Image Credits: AI Generated

DOI: https://doi.org/10.1007/s11581-025-06762-8

Keywords: Lithium-ion batteries; Fire safety; Ionic conductivity; Electrolyte solvents; Ternary systems; Energy storage; Thermal runaway; Experimental validation; Theoretical modeling; Sustainable technology.