Synthesis of graphene-like porous carbon from biomass for electrochemical energy storage applications
Yeleuov M. Daulbayev C. Taurbekov A. Abdisattar A. Ebrahim R. Kumekov S. Prikhodko N. Lesbayev B. Batyrzhan K.
November 2021Elsevier Ltd
Diamond and Related Materials
2021#119
Graphene-like porous carbon (GLC) was synthesized from walnut shell (WSh) by carbonization and thermochemical activation process. The obtained samples of graphene-like porous carbon based on walnut shell (GLC-WSh) were characterized by physicochemical analysis in order to optimize the synthesis process. The optimum condition of GLC-WSh synthesis was determined to meet the basic requirements for various applications such as an active material for supercapacitors, lithium-ion battery, as energy-intensive additives in order to increase the efficiency of high-energy rocket fuels, and as a membrane for desalination of seawater. The Raman spectra confirmed the presence of few-layer graphene in GLC-WSh with on average number of 5–7 graphene layers. The specific surface area (SSA) was determined using nitrogen adsorption/desorption analysis. The SSA is 2800 m2 g−1 according to Brunauer-Emmett-Teller method. The mass yield of GLC-WSh from the initial mass of the WSh was 21%. The synthesized GLC-WSh powder was applied as an active material for an electrochemical double layer capacitor. Electrochemical characterization showed a high specific capacitance value of 263 F/ g and columbic efficiency of 99.4% at a gravimetric current density of 1000 mA/ g.
Biowaste derived , Electrochemical double layer capacitor , Few-layer graphene , Graphene-like porous carbon , Walnut shell
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Institute of Combustion Problems, Almaty, 050012, Kazakhstan
Satbayev University, Almaty, 050000, Kazakhstan
Al-Farabi Kazakh National University, Almaty, 050040, Kazakhstan
University of Houston, Houston, 77204, TX, United States
Almaty University of Power Engineering and Telecommunications, Almaty, 050013, Kazakhstan
Institute of Nuclear Physics, Almaty, 050040, Kazakhstan
Institute of Combustion Problems
Satbayev University
Al-Farabi Kazakh National University
University of Houston
Almaty University of Power Engineering and Telecommunications
Institute of Nuclear Physics
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