Modified Activated Graphene-Based Carbon Electrodes from Rice Husk for Supercapacitor Applications

Mukhtar Yeleuov, Christopher Seidl, Tolganay Temirgaliyeva, Azamat Taurbekov, Nicholay Prikhodko, Bakytzhan Lesbayev, Fail Sultanov, Chingis Daulbayev and Serik Kumekov
Additional contact information
Mukhtar Yeleuov: Department of Engineering Physics, Satbayev University, Almaty 050013, Kazakhstan
Christopher Seidl: Faculty of Engineering & Natural Sciences, Johannes Kepler University Linz, 4040 Linz, Austria
Tolganay Temirgaliyeva: Laboratory of Carbon Nanomaterials Synthesis in Flame, Institute of Combustion Problems, Almaty 050000, Kazakhstan
Azamat Taurbekov: Laboratory of Carbon Nanomaterials Synthesis in Flame, Institute of Combustion Problems, Almaty 050000, Kazakhstan
Nicholay Prikhodko: Laboratory of Carbon Nanomaterials Synthesis in Flame, Institute of Combustion Problems, Almaty 050000, Kazakhstan
Bakytzhan Lesbayev: Laboratory of Carbon Nanomaterials Synthesis in Flame, Institute of Combustion Problems, Almaty 050000, Kazakhstan
Fail Sultanov: Laboratory of Carbon Nanomaterials Synthesis in Flame, Institute of Combustion Problems, Almaty 050000, Kazakhstan
Chingis Daulbayev: Department of Engineering Physics, Satbayev University, Almaty 050013, Kazakhstan
Serik Kumekov: Department of Engineering Physics, Satbayev University, Almaty 050013, Kazakhstan

Energies, 2020, vol. 13, issue 18, 1-10

Abstract: The renewable biomass material obtained from rice husk, a low-cost agricultural waste, was used as a precursor to synthesize a highly porous graphene-based carbon as electrode material for supercapacitors. Activated graphene-based carbon (AGC) was obtained by a two-step chemical procedure and exhibited a very high specific surface area (SSA) of 3292 m 2 g −1 . The surface morphology of the synthesized materials was studied using scanning and transmission electron microscopy (SEM, TEM). Furthermore, the AGC was modified with nickel hydroxide Ni(OH) 2 through a simple chemical precipitation method. It was found that the most significant increase in capacitance could be reached with Ni(OH) 2 loadings of around 9 wt.%. The measured specific capacitance of the pure AGC supercapacitor electrodes was 236 F g −1 , whereas electrodes from the material modified with 9 wt.% Ni(OH) 2 showed a specific capacitance of up to 300 F g −1 at a current density of 50 mA g −1 . The increase in specific capacitance achieved due to chemical modification was, therefore 27%.

Keywords: supercapacitor electrode; activated rice husk; few-layer graphene; nickel hydroxide (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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