Converting the electrochemical performance of large batteries into a micro power supply has always been a long -term technical challenge, which limits the ability to power the battery to power the micro -equipment, miniature robots and implants medical equipment. Researchers at the University of Illinois champagne created a high -voltage micro -battery (> 9 V), which has high energy and high power density, which is incomparable with any existing battery design.
Professor Paul Braun (Grainger Engineering Outstanding Teachers, Director of Materials Research Laboratory), Dr. SUNGBONG KIM (post -doctoral, Matse, now the assistant professor of the Korean Military Academy) and Arghya Patra (graduate, MAL Common first author) Recently published the paper on Cell Reports Physical Science, “Serially Integrated High-Voltage and High-Power Miniature Batteries”.
The team shows the seal (closely shut down to prevent exposure to the environmental air), durable, compact lithium batteries, with extremely low packaging quality scores, using single -layer, double and three -layer stack configuration. It has unprecedented working voltage. High power density and energy density.
BRAUN explained: “We need a powerful micro -battery, to release the entire potential of miniature equipment by improving the electrode structure and proposing an innovative battery design.” The problem is that as the battery becomes smaller and smaller, the packaging determines the battery. Volume and quality, but the electrode area is getting smaller and smaller. This has led to a sharp decline in the energy and power of the battery.
In their unique powerful micro -battery design, the team has developed novel packaging technologies to use the positive and negative polarized electrical appliances as part of the packaging itself (not a separate entity). This allows a compact volume (? 0.165 CM 3) and a battery with low packaging mass scores (10.2%). In addition, they connected the electrode battery to stack vertically (therefore the voltage of each battery was added), thereby realizing the high working voltage of the battery.
Another method to improve these micro batteries is to use very dense electrodes to provide energy density. Almost 40% of ordinary electrodes are occupied by polymers and carbon additives (non -active materials). Braun’s team grows through medium -temperature direct electrical deposition technology that is completely dense and does not contain polymers and carbon additives. These completely dense electrodes provide higher volume energy density than commercial electrodes. The micro -battery in this study is manufactured by the Xerion Advanced Battery Corporation (XABC, Ohio, Donate City), which is separated from the research of Braun.
Patra mentioned that “so far, the electrode structure and battery design of micro -nano -standard are limited to the power dense design at the cost of pore rate and volume energy density. Density and volume energy density. ”
An important application area of these miniature batteries includes motivation for insect -sized micro -robots to obtain valuable information in the dangerous environment that human beings cannot directly access in the dangerous environment that human beings cannot directly access. The co -owner James Pikul (assistant professor at the Department of Mechanical Engineering and Applied Mechanics at the University of Pennsylvania) pointed out that “high voltage is important for reducing the electronic load that needs to be carried by micro -robots. Raise the voltage to hundreds of or kievant -related energy losses.
Kim added: “Our work has brought about the unique material manufacturing requirements of material chemistry, energy dense graphic micro -battery configuration, and high -voltage plate -load power supply to drive the intellectual gap in cross -field fields such as microcontrollers and nano -micro -electronics. Electric. ”
Braun, a pioneer in the field of battery miniaturization, concluded, “Our current micro -battery design is very suitable for high -energy, high power, high voltage, single discharge application. The next step is to transform the design into all solid micro -battery platforms, which is essentially compared The liquid battery is safer and has a higher energy density battery. “