|
A B S T R A C T
Activated porous carbon (APC), which is used as the electrode material in electrical double layer
capacitors (EDLCs), is constantly being developed to enhance its electrochemical performance with low
cost. Nevertheless, APC still encounters important challenges due to the limited amount of raw material
resources. Herein, we propose a novel and simple approach to synthesize APC from tofu using a simple
synthesis process involving carbonization with KOH activation. To obtain the optimized APC, three types
of APCs are prepared using different weight ratios of 1:3, 1:4, and 1:5 (WTofu/WKOH) during the
carbonization. The optimized APC electrode shows an outstanding specific capacitance of 207 F g1 at a
current density of 0.1 A g1
, a remarkable high-rate performance, an impressive energy density of
25.7–19.9Wh kg1
, and an excellent cycling stability for up to 2000 cycles. Therefore, this unique
approach to obtain APC using tofu yield a material with some useful qualities in terms of an increased
number of electroactive sites based on a high surface area, and an improved wettability based on the
oxygen-containing functional groups on the surface of the APC. Accordingly, tofu-based APC is a
promising alternative to conventional APC.
© 2017 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights
reserved.
|
|
