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Enhancement in the Specific Energy of B‐doped Graphene Using Redox Additive Electrolytes
Author(s) -
Suresh Balaji S.,
Mohammad Tauquir Shaikh,
Karnan M.,
Moorthy Megala,
Sathish M.
Publication year - 2020
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202002548
Subject(s) - graphene , supercapacitor , electrochemistry , redox , electrolyte , capacitance , oxide , heteroatom , hydroquinone , materials science , doping , specific energy , carbon fibers , chemical engineering , analytical chemistry (journal) , chemistry , nanotechnology , electrode , inorganic chemistry , composite number , optoelectronics , ring (chemistry) , chromatography , organic chemistry , physics , quantum mechanics , composite material , engineering , metallurgy
Electrochemical performance of carbon materials can be enhanced by doping with heteroatoms. Electrochemical investigations suggest that the B‐doped graphene in which B‐source and graphene oxide are in the ratio 1 : 1 demonstrates a highest specific capacitance of 406 F/g at 2 A/g in 1 M H 2 SO 4 . The specific capacity of B‐doped graphene in 0.01 M hydroquinone (HQ)/H 2 SO 4 is 2523 C/g in redox additive electrolyte. Performance evaluation of fabricated symmetric supercapacitor cell indicates that the specific capacitance in 0.01 M HQ/H 2 SO 4 and 1 M H 2 SO 4 solution are found to be 440 and 284 F/g at 3 A/g, respectively and greater than EMIMBF 4 (97 F/g). The maximum specific energy of the fabricated symmetric cell achieved using 0.01 M HQ/H 2 SO 4 solution is found to be 50 Wh/kg which is comparatively superior than 1 M H 2 SO 4 (14.2 Wh/kg) and EMIMBF 4 (30 Wh/kg).