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Construction of High‐Energy‐Density Supercapacitors from Pine‐Cone‐Derived High‐Surface‐Area Carbons
Author(s) -
Karthikeyan Kaliyappan,
Amaresh Samuthirapandiyan,
Lee Sol Nip,
Sun Xueliang,
Aravindan Vanchiappan,
Lee YoungGi,
Lee Yun Sung
Publication year - 2014
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201301262
Subject(s) - supercapacitor , capacitance , materials science , electrode , specific surface area , chemical engineering , biomass (ecology) , conifer cone , petal , current density , composite material , nanotechnology , chemistry , organic chemistry , botany , catalysis , physics , engineering , biology , geology , quantum mechanics , oceanography
Very high surface area activated carbons (AC) are synthesized from pine cone petals by a chemical activation process and subsequently evaluated as an electrode material for supercapacitor applications in a nonaqueous medium. The maximum specific surface area of ∼3950 m 2 g −1 is noted for the material treated with a 1:5 ratio of KOH to pine cone petals (PCC5), which is much higher than that reported for carbonaceous materials derived from various other biomass precursors. A symmetric supercapacitor is fabricated with PCC5 electrodes, and the results showed enhanced supercapacitive behavior with the highest energy density of ∼61 Wh kg −1 . Furthermore, outstanding cycling ability is evidenced for such a configuration, and ∼90 % of the initial specific capacitance after 20 000 cycles under harsh conditions was observed. This result revealed that the pine‐cone‐derived high‐surface‐area AC can be used effectively as a promising electrode material to construct high‐energy‐density supercapacitors.