David Arnot, a graduate student at Stony Brook University in the Materials Science and Chemical Engineering department, has received the silver award from the Materials Research Society (MRS) during its fall 2025 conference.
Arnot explained that his research is important not only to material scientists but also for those working in electrochemistry and physical characterization. “This research was significant to mostly material scientists, but it’s also very important in terms of electrochemistry and physical characterization techniques,” Arnot said. “I was very happy to be selected as a finalist.”
He participated in the graduate student awards section of the conference. Finalists were chosen by a committee and then delivered oral presentations about their work.
The focus of Arnot’s research is on batteries used in implantable medical devices such as heart defibrillators. These batteries need both high energy storage and strong power delivery capabilities. According to Arnot, achieving this combination has been historically difficult for battery technology: “This particular combination is historically very difficult for batteries to achieve,” he said. “So we’re looking at a particular mixture, which is a hybrid electrode. It uses two different active materials. One of them gives you energy density, the other gives you power density. You combine them together to get both properties at the same time.”
The project team includes Esther Takeuchi, Amy Marschilok, and Kenneth Takeuchi. They use three different techniques that leverage resources available at both Brookhaven National Laboratory and Stony Brook University.
Esther Takeuchi commented on the complexity of the research: “This research required detailed understanding of materials, mechanical design, electrochemistry, and several advanced characterization methods,” she said. “We are delighted that the research that David conducted was recognized favorably by the MRS.”
Arnot added that combining various characterization methods provides greater insight than using each method separately: “The main idea is that we use these different characterization methods in a synergistic way and get something that’s bigger than the sum of its parts by combining all these unique tools that we have,” he said.
The team faced challenges due to limited existing studies on this specific type of battery system. Arnot noted: “It’s a niche system that a lot of people aren’t necessarily studying,” he said. “The real challenge is that batteries themselves are already very complicated. Developing advanced characterization methods allows us to continue pushing the envelope with materials design to enable next-generation technologies.”
