کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
183211 459542 2016 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation of mesoporous microspheres of NiO with high surface area and analysis on their pseudocapacitive behavior
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Preparation of mesoporous microspheres of NiO with high surface area and analysis on their pseudocapacitive behavior
چکیده انگلیسی

Nickel oxide with a high surface area showing high capacitance is reported here. Mesoporous microspheres (MMS) of 250NiO, 300NiO, 350NiO, 400NiO and 500NiO are synthesized by calcining mesoporous α-Ni(OH)2 at 250 °C, 300 °C, 350 °C, 400 °C, and 500 °C, respectively. The mesoporous α-Ni(OH)2 was prepared by a hydrothermal method. 250NiO has the highest specific surface area of 295 m2/g, and a high specific capacitance of 1,140 F g−1 at a current density of 10 A g−1 from galvanostatic discharge measurements. The cyclic voltammetry, galvanostatic discharge measurement and electrochemical impedance analysis exhibited that the pseudocapacitive behavior is more clarified for NiO prepared at higher calcination temperature. Apparently, the high specific capacitance of 250NiO results from the mesoporous pores and high specific surface area enhancing the transportation of ions during the charging and discharging process to store high energy. The power density and energy density of the 250NiO are 2.5 kW kg−1 and 59 W h kg−1 respectively at the current density of 10 A g−1.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 193, 1 March 2016, Pages 145–153
نویسندگان
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