10.1021/acsami.8b09661.s001
Liang Chang
Liang
Chang
Kai Sun
Kai
Sun
Yun Hang Hu
Yun Hang
Hu
New
Chemistry for New Material: Highly Dense Mesoporous
Carbon Electrode for Supercapacitors with High Areal Capacitance
American Chemical Society
2018
gravimetric
New
electrode
density
capacitance
Dense Mesoporous Carbon Electrode
DMPC
areal
CO
High Areal Capacitance
material
double-layer capacitors
2018-09-07 00:00:00
Journal contribution
https://acs.figshare.com/articles/journal_contribution/New_Chemistry_for_New_Material_Highly_Dense_Mesoporous_Carbon_Electrode_for_Supercapacitors_with_High_Areal_Capacitance/7100642
The
discovery of new chemical reactions plays an important role
in new material synthesis. For electric double-layer capacitors, a
high packing density and a large surface area are required, but contradiction
for current porous carbon electrodes. This causes a critical trade-off
issue among gravimetric, areal, and volumetric capacitances. Herein,
a new chemistry was found to synthesize a new type of carbon material,
namely, a new reaction between CO and Li directly produces three-dimensional
dense mesoporous carbon (DMPC). Its high packing density of 1.94 g/cm<sup>3</sup> is much larger than those (0.05–0.7 g/cm<sup>3</sup>) of other porous carbon materials. Consequently, the aqueous electric
double-layer capacitors with DMPC electrodes, which have 11.5 mg/cm<sup>2</sup> mass loading, can reach high areal capacitance (2.15 F/cm<sup>2</sup> at 1 A/g). It also exhibited large volumetric and gravimetric
capacitances (220.5 F/cm<sup>3</sup> and 205.2 F/g) without sacrificing
areal capacitance. Furthermore, after 5000 charge/discharge cycles,
capacitance retention is as large as 98.4%, indicating a high stability
of the electrode. Therefore, DMPC is an excellent material for the
electrodes of practical electric double-layer capacitors.