Fully Printed, High-Temperature Micro-Supercapacitor Arrays Enabled by a Hexagonal Boron Nitride Ionogel Electrolyte
Lindsay E Chaney1, Woo Jin Hyun1,2, Maryam Khalaj1
1Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA.
Advanced Materials (Deerfield Beach, Fla.)
|August 4, 2023
Summary
Flexible micro-supercapacitors using graphene and hexagonal boron nitride (hBN) ionogel electrolytes offer high performance for extreme environments. Scalable screen printing enables compact, high-temperature energy storage for portable electronics.
Area of Science:
- Materials Science
- Energy Storage
- Nanotechnology
Background:
- Portable electronics demand compact, flexible, and scalable energy storage solutions.
- Existing energy storage devices face limitations in flexibility and high-temperature operation.
Purpose of the Study:
- To demonstrate mechanically flexible micro-supercapacitor arrays using screen printing.
- To develop high-temperature stable electrolytes for enhanced energy storage.
Main Methods:
- Sequential high-speed screen printing of graphene electrodes.
- Fabrication of a hexagonal boron nitride (hBN) ionogel electrolyte with ionic liquids.
- Characterization of micro-supercapacitor performance at elevated temperatures.
Main Results:
- Achieved micro-supercapacitors with areal capacitances approaching 1 mF cm-2.
- Demonstrated stable operation at temperatures up to 180 °C.
- Exhibited increased power densities at elevated temperatures.
Conclusions:
- hBN ionogel electrolytes enable high-performance, high-temperature flexible micro-supercapacitors.
- Screen-printed micro-supercapacitors are suitable for harsh environment applications.
- Scalable additive manufacturing broadens possibilities for on-chip energy storage.
