Bio-derived carbon with tailored hierarchical pore structures and ultra-high specific surface area for superior and advanced supercapacitors

TY - JOUR

T1 - Bio-derived carbon with tailored hierarchical pore structures and ultra-high specific surface area for superior and advanced supercapacitors

AU - Zhang, Fuming

AU - Xiao, Xiangshang

AU - Gandla, Dayakar

AU - Liu, Zhaoxi

AU - Tan, Daniel Q.

AU - Ein-Eli, Yair

N1 - Publisher Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

PY - 2022/1/1

Y1 - 2022/1/1

N2 - We report here on a hollow-fiber hierarchical porous carbon exhibiting an ultra-high specific surface area, synthesized by a facile method of carbonization and activation, using the Metaplexis Japonica (MJ) shell. The Metaplexis Japonica-based activated carbon demonstrated a very high specific surface area of 3635 m2 g−1. Correspondingly, the derived carbonaceous material delivers an ultra-high capacitance and superb cycle life in an alkaline electrolyte. The pore-ion size compatibility is optimized using tailored hierarchical porous carbon and different ion sized organic electrolytes. In ionic liquids nonaqueous based electrolytes we tailored the MJ carbon pore structure to the electrolyte ion size. The corresponding supercapacitor shows a superior rate performance and low impedance, and the device records specific energy and specific power densities as high as 76 Wh kg−1 and 6521 W kg−1, as well as a pronounced cycling durability in the ionic liquid electrolytes. Overall, we suggest a protocol for promising carbonaceous electrode materials enabling superior supercapacitors performance.

AB - We report here on a hollow-fiber hierarchical porous carbon exhibiting an ultra-high specific surface area, synthesized by a facile method of carbonization and activation, using the Metaplexis Japonica (MJ) shell. The Metaplexis Japonica-based activated carbon demonstrated a very high specific surface area of 3635 m2 g−1. Correspondingly, the derived carbonaceous material delivers an ultra-high capacitance and superb cycle life in an alkaline electrolyte. The pore-ion size compatibility is optimized using tailored hierarchical porous carbon and different ion sized organic electrolytes. In ionic liquids nonaqueous based electrolytes we tailored the MJ carbon pore structure to the electrolyte ion size. The corresponding supercapacitor shows a superior rate performance and low impedance, and the device records specific energy and specific power densities as high as 76 Wh kg−1 and 6521 W kg−1, as well as a pronounced cycling durability in the ionic liquid electrolytes. Overall, we suggest a protocol for promising carbonaceous electrode materials enabling superior supercapacitors performance.

KW - Carbon from biomass

KW - Electrolyte ion size

KW - Ionic liquid

KW - Metaplexis Japonica

KW - Supercapacitor

UR - http://www.scopus.com/inward/record.url?scp=85121561976&partnerID=8YFLogxK

U2 - 10.3390/nano12010027

DO - 10.3390/nano12010027

M3 - 文章

AN - SCOPUS:85121561976

SN - 2079-4991

VL - 12

JO - Nanomaterials

JF - Nanomaterials

IS - 1

M1 - 27

ER -