TY - JOUR
T1 - Nitrogen and Phosphorus Co-doped Nanoporous Carbons from Phosphoprotein/Silica Self-Assemblies for Energy Storage in Supercapacitors
AU - Fragal, Vanessa H.
AU - Fragal, Elizângela H.
AU - da Silva, Elisangela P.
AU - Acerce, Muharrem
AU - Chhowalla, Manish
AU - Rubira, Adley F.
AU - Tambourgi, Elias B.
AU - Asefa, Tewodros
AU - Silva, Rafael
N1 - Funding Information:
V.H.F. and E.H.F. thank the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES‐Brasil) and the Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq‐Brasil) for their doctoral fellowships. A.F.R. and R.S. acknowledge the financial supports given by CNPq‐Brasil, CAPES‐Brasil and Fundação Araucária‐Brasil. T.A. gratefully acknowledges the financial support of the Rutgers Global Program, and the U.S. National Science Foundation (Grant No.: 1508611) for supporting this work.
PY - 2020/12/1
Y1 - 2020/12/1
N2 - In this work, nanoporous, heteroatom-doped carbon materials with tailorable structures and excellent charge/energy storage properties are synthesized using casein (a phosphoprotein) as a precursor and silica gel as a template via a facile synthetic route. The synthesis involves carbonization and etching. In the synthesis, an appreciable amount of the N and P atoms in casein make it as dopants into the nanoporous carbons, enabling the materials to efficiently store charge. The structures and compositions as well as the overall charge storage properties of the materials are easily tuned by varying the relative amount of silica gel template used with casein in the precursors. By using an optimal amount of silica in the casein/silica self-assemblies, a nanoporous carbon with low resistance to Faradaic processes and good capacitance and pseudocapacitance is obtained. This material gives a capacitance of ca. 261 F g−1 at 1 A g−1, which is higher than those of many recently reported carbon materials in the literature. Moreover, the material retains 95 % of the initial capacitance with ca. 100 % of coulombic efficiency after 10,000 charge-discharge cycles.
AB - In this work, nanoporous, heteroatom-doped carbon materials with tailorable structures and excellent charge/energy storage properties are synthesized using casein (a phosphoprotein) as a precursor and silica gel as a template via a facile synthetic route. The synthesis involves carbonization and etching. In the synthesis, an appreciable amount of the N and P atoms in casein make it as dopants into the nanoporous carbons, enabling the materials to efficiently store charge. The structures and compositions as well as the overall charge storage properties of the materials are easily tuned by varying the relative amount of silica gel template used with casein in the precursors. By using an optimal amount of silica in the casein/silica self-assemblies, a nanoporous carbon with low resistance to Faradaic processes and good capacitance and pseudocapacitance is obtained. This material gives a capacitance of ca. 261 F g−1 at 1 A g−1, which is higher than those of many recently reported carbon materials in the literature. Moreover, the material retains 95 % of the initial capacitance with ca. 100 % of coulombic efficiency after 10,000 charge-discharge cycles.
KW - casein-derived carbon
KW - electrochemical supercapacitor
KW - energy storage
KW - heteroatom-doped carbon
KW - nanoporous carbon
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U2 - 10.1002/celc.202001428
DO - 10.1002/celc.202001428
M3 - Article
AN - SCOPUS:85097430391
VL - 7
SP - 4773
EP - 4781
JO - ChemElectroChem
JF - ChemElectroChem
SN - 2196-0216
IS - 23
ER -