Abstract
Fabrication of high-energy-density and high-power-density packaged long-cycle-life rechargeable microbatteries remains a considerable challenge. Here, high-performance microbatteries with high active volume fraction, thick, 3D-structured electrodes (V2 O5 cathode and Li metal anode) are realized through a combination of imprint lithography, self-assembly, and electrodeposition. To assist the critical challenge of hermetic packaging, the microbattery is infilled with a gel electrolyte. The packaged cell exhibits high areal energy and power densities of 1.24 J cm-2 and 75.5 mW cm-2 , respectively, and can be cycled 550 times in argon or 200 times in air with 75% capacity retention of the initial discharge capacity. An unpackaged cell, using a liquid electrolyte, provides a power density of 218 mW cm-2 . As far as it is known, the microbatteries have the highest peak power density among all reported microbatteries.
Original language | English (US) |
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Article number | 2006229 |
Pages (from-to) | e2006229 |
Journal | Advanced materials (Deerfield Beach, Fla.) |
Volume | 33 |
Issue number | 1 |
Early online date | Nov 26 2020 |
DOIs | |
State | Published - Jan 7 2021 |
Keywords
- gel electrolytes
- hermetic packaging
- imprint lithography
- microbatteries
- thick 3D electrodes
ASJC Scopus subject areas
- Mechanics of Materials
- Mechanical Engineering
- General Materials Science