The battery resolves a longstanding technological issue that no other battery design has ever addressed.
Micro batteries have the incredible potential to power microdevices, microrobots, and implantable medical devices. However, up to recently they have not been very efficient as they lacked power.
Now, the University of Illinois Urbana-Champaign researchers has created a high-voltage microbattery unparalleled by any existing battery design,“We need powerful tiny batteries to unlock the full potential of microscale devices, by improving the electrode architectures and coming up with innovative battery designs,” Material Science and Engineering Professor Paul Braun explained.
One problem that the researchers had to overcome was that as batteries become smaller, the packaging dominates the battery volume and mass while the electrode area becomes smaller, resulting in significant reductions in energy and power. To overcome this issue, the team developed novel packaging technology that used the positive and negative terminal current collectors as part of the packaging itself.“To date, electrode architectures and cell designs at the micro-nano scale have been limited to power-dense designs that came at the cost of porosity and volumetric energy density.
“Our work bridges the knowledge gap at the intersection of materials chemistry, unique materials manufacturing requirements for energy-dense planar microbattery configurations, and applied nano-microelectronics that require a high-voltage, on-board type power source to drive microactuators and micromotors,” Dr. Sungbong Kim added.
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