Molecular Layer Deposition Derived Large Area Porous Carbon for High Performance Supercapacitors

Abstract

In this work, the Aluminum-Fumaric acid (Al-FA) inorganic-organic hybrid films were successfully deposited by molecular layer deposition (MLD). Porous carbon can be obtained by annealing the Al-FA hybrids followed by KOH etching. Adopting carbon cloth as supporter, large area carbon cloth@porous carbon (CC@PC) can be fabricated, which can be directly used as electrodes for supercapacitors. CC@PC prepared at 600 oC exhibits the best electrochemical performance. The specific capacitance of CC@PC electrode reaches 195.2 F g-1 at the current density of 1 A g-1. In addition, CC@PC shows excellent rate capability, the capacitance retention rate is 81.1% when the current density increases by 20 times to 20 A g-1. Furthermore, the specific capacitance can be maintained at around 98.4% after 10000 cycles of charging and discharging at a current density of 20 A g-1, demonstrating excellent cycling stability. These results indicate that MLD derived CC@PC may be a promising high-performance electrode for supercapacitors.

Keywords: molecular layer deposition，large area，porous carbon，supercapacitor，