High performance nanoporous carbon microsupercapacitors generated by a solvent-free MOF-CVD method
Review articleOpen access
Abstract:

AbstractMicro power sources that support higher power capabilities, specific energies, and ultra-long cycling lifetimes are required for next generation microelectro-mechanical systems (MEMS) and miniaturized portable microdevices. We demonstrated a simple, solvent-free method to coat interdigitated gold electrodes with a conformal layer of nanoporous carbon. Initially the electrodes were coated with a film of ZnO via electrodeposition to serve as the zinc source. These films were exposed to 2-methylimidazole vapor to transform the ZnO into a metal organic framework (MOF) called ZIF-8. The thickness of the ZnO film and the duration of the MOF conversion process created ZIF-8 films with different morphologies, cross-sections and elemental compositions. The ZIF-8 films were then carbonized at 800 °C under a flowing environment of N2 gas to generate nanoporous carbon film electrodes for supercapacitors. The devices have superior capacitance retention, in addition to high power and energy densities. Our 16-electrode microsupercapacitor had a stack power of 232.8  W⋅cm−3, which could be attained even at a scan rate of 1000 V ⋅s−1, without rapid stack energy attenuation. The process of combining an inexpensive ZnO electrodeposition method with solvent-free MOF deposition and subsequent carbonization generates high surface area carbon electrodes with good electrochemical performance.

Request full text

References (0)

Cited By (0)

No reference data.
No citation data.
Advertisement
Join Copernicus Academic and get access to over 12 million papers authored by 7+ million academics.
Join for free!