An eco-friendly,new,and controllable approach for the preparation of manganese oxide (α-MnO2) nanor-ods has been introduced using hydrothermal reaction for supercapacitor application.The in-depth crystal structure analysis of α-MnO2 is analyzed by X-ray Rietveld refinement by using FullProf program with the help of pseudo-Voigt profile function.The developed α-MnO2 electrode attains a remarkable capacitance of 577.7 F/g recorded at a current density value of 1 A/g with an excellent cycle life when is used for 10,000 repeated cycles due to the porous nanorod-morphology assisting the ease penetration of elec-trolyte ions into the electroactive sites.The diffusive and capacitive contributions of the electrode have been estimated by considering standard numerical packages in Python.After successfully assembling the aqueous symmetric supercapacitor (SSC) cell by utilizing the as-prepared α-MnO2,an excellent capacitance of 163.5 F/g and energy density of 58.1 Wh/kg at the constant current density of 0.5 A/g are obtained with an expanded potential frame of 1.6 V.Moreover,the cell has exceptionally withstood up to 10,000 cycles with an ultimate capacitance retention of 94.1％ including the ability to light an LED for 18 s.Such findings recommend the developed α-MnO2 electrode to be a highly felicitous electrode for the field of energy storage.

Bidhan Pandit;Emad S.Goda;Mahmoud H.Abu Elella;Aafaq ur Rehman;Sang Eun Hong;Sachin R.Rondiya;Pranay Barkataki;Shoyebmohamad F.Shaikh;Abdullah M.Al-Enizi;Salah M.El-Bahy;Kuk Ro Yoon

Department of Materials Science and Engineering and Chemical Engineering,Universidad Carlos Ⅲ de Madrid,Avenida de la Universidad 30,28911 Leganés,Madrid,Spain;Organic Nanomaterials Lab,Department of Chemistry,Hannam University,Daejeon 34054,Republic of Korea;Fire Protection Laboratory,National Institute of Standards,136,Giza 12211,Egypt;Chemistry Department,Faculty of Science,Cairo University,Giza 12613,Egypt;Graduate School of Energy Science and Technology,Chungnam National University,99 Daehak-ro,Yuseong-gu,Daejeon 34134,Republic of Korea;School of Chemistry,Cardiff University,Main Building,Park Place,Cardiff,CF103AT Wales,United Kingdom;Department of Physics,Visvesvaraya National Institute of Technology,South Ambazari Road,Nagpur-440010,Maharashtra,India;Department of Chemistry,College of Science,King Saud University,P.O.Box 2455,Riyadh 11451,Saudi Arabia;Department of Chemistry,Turabah University College,Taif University,P.O.Box 11099,Taif 21944,Saudi Arabia

能源化学

[1]Bidhan Pandit;Emad S.Goda;Mahmoud H.Abu Elella;Aafaq ur Rehman;Sang Eun Hong;Sachin R.Rondiya;Pranay Barkataki;Shoyebmohamad F.Shaikh;Abdullah M.Al-Enizi;Salah M.El-Bahy;Kuk Ro Yoon-.One-pot hydrothermal preparation of hierarchical manganese oxide nanorods for high-performance symmetric supercapacitors)[J].能源化学,2022(02):116-126

nanor,FullProf,withstood,felicitous

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