TY - JOUR

T1 - Rice husk derived activated carbon/polyaniline composites as active materials for supercapacitors

AU - Lebedeva, M. V.

AU - Ayupov, A. B.

AU - Yeletsky, P. M.

AU - Parmon, V. N.

PY - 2018/4/1

Y1 - 2018/4/1

N2 - Composite materials (CM) "carbon/polyaniline" were synthesized using porous activated carbon (AC) produced from carbonized rice husk, which has specific surface area 2265 m2g-1 measured by direct BET method . The series of the CM was synthesized by oxidative aniline polymerization method in the presence of the AC in acidic medium; polyaniline (PAni) content was varied from 18 to 60 wt. %. Electrochemical and properties of the CM were investigated by cyclic voltammetry, galvanostatic charge/discharge and stability tests. Results indicate that properties of the composites are governed by ratio of the components: a form of cyclic voltammogram curves and location of specific ox-red polyaniline peaks strongly depend on the PAni amount. Gravimetric capacitance grows with polymer content in the material and reaches maxima 465 F·g-1 in 1M H2SO4 at discharge current density 0.2 A·g-1 for the sample with polyaniline content 60 wt %. However, durability tests show that the most stable is the sample with the lowest (18 wt. %) polyaniline amount.

AB - Composite materials (CM) "carbon/polyaniline" were synthesized using porous activated carbon (AC) produced from carbonized rice husk, which has specific surface area 2265 m2g-1 measured by direct BET method . The series of the CM was synthesized by oxidative aniline polymerization method in the presence of the AC in acidic medium; polyaniline (PAni) content was varied from 18 to 60 wt. %. Electrochemical and properties of the CM were investigated by cyclic voltammetry, galvanostatic charge/discharge and stability tests. Results indicate that properties of the composites are governed by ratio of the components: a form of cyclic voltammogram curves and location of specific ox-red polyaniline peaks strongly depend on the PAni amount. Gravimetric capacitance grows with polymer content in the material and reaches maxima 465 F·g-1 in 1M H2SO4 at discharge current density 0.2 A·g-1 for the sample with polyaniline content 60 wt %. However, durability tests show that the most stable is the sample with the lowest (18 wt. %) polyaniline amount.

KW - Activated carbon

KW - Composite materials

KW - Polyaniline

KW - Rice Husk

KW - Synergetic effect

UR - http://www.scopus.com/inward/record.url?scp=85045025119&partnerID=8YFLogxK

U2 - 10.20964/2018.04.34

DO - 10.20964/2018.04.34

M3 - Article

AN - SCOPUS:85045025119

VL - 13

SP - 3674

EP - 3690

JO - International Journal of Electrochemical Science

JF - International Journal of Electrochemical Science

SN - 1452-3981

IS - 4

ER -