A Nearly Packaging‐Free Design Paradigm for Light, Powerful, and Energy‐Dense Primary Microbatteries
Abstract
Billions of internet connected devices used for medicine, wearables, and robotics require microbattery power sources, but the conflicting scaling laws between electronics and energy storage have led to inadequate power sources that severely limit the performance of these physically small devices. Reported here is a new design paradigm for primary microbatteries that drastically improves energy and power density by eliminating the vast majority of the packaging and through the use of high‐energy‐density anode and cathode materials. These light (50–80 mg) and small (20–40 µL) microbatteries are enabled though the electroplating of 130 µm‐thick 94% dense additive‐free and crystallographically oriented LiCoO2 onto thin metal foils, which also act as the encapsulation layer. These devices have 430 Wh kg−1 and 1050 Wh L−1 energy densities, 4 times the energy density of previous similarly sized microbatteries, opening up the potential to power otherwise unpowerable microdevices.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jul 19, 2021
- Source ID
- 10.1002/adma.202101760
Entities
People
- Aaron J. Blake
- Akaash Padmanabha
- Alissa C. Johnson
- Arghya Patra
- Chadd T. Kiggins
- Evan M. Beale
- James H Pikul
- Jessica Grzyb
- John B Cook
- Mark Daroux
- Mehmet N. Ates
- Min Wang
- Paul V Braun
- Pengcheng Sun
- Ryan R. Kohlmeyer
- Sonika V. Singh
- Sungbong Kim
- Xiujun Yue
- Zhimin Jiang
Organizations
- Defense Advanced Research Projects Agency
- University of Illinois Urbana–Champaign
- University of Pennsylvania