Synthesis a new Ni-MOF and study effect of contemporary TMU-10 and newNi-MOF synthesis and survey a new bi MOF-rGO composite as material forpositive electrode in supercapacitors

سال انتشار: 1395
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 289

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شناسه ملی سند علمی:

ELECTROCHEMISTRY012_136

تاریخ نمایه سازی: 5 آذر 1397

چکیده مقاله:

Nowadays due to the rapid progress of electronic science and the increasing expansion of mobileelectronic devices, also due to increasing energy consumption and etc, electrical energy storagesystems have been highly regarded. Among electrical energy storage systems, electrochemicalenergy storage systems such as fuel cells, batteries (Li-ion) and supercapacitors (SCs) areconsiderable candidates. One of the smart choices for SCs active materials are metal organicframeworks. Emerging this class of nano porous materials with high surface area, largeelectrolyte-accessibility and also transition metal in their structures (transition metal/oxides dueto Faradaic redox reactions have a higher capacitance and energy compare to carbonaceousmaterials) open a new window to fabricate and present high performance SCs. Based on theabove considerations in this communication, we propose a new method with interesting results toenhance MOF-SCs. We tried to synthesis two MOFs at same time, and we have gainedinteresting result. Existing secondary metal interestingly effect on another MOF morphology andfinally we found a synergic effect. Our first step was synthesized a new nickel MOF that hasgood stability in water with same linker toward TMU-10, in the second step we synthesized bothMOFs at same time and after characterization by SEM, TEM, EDX, XPS, XRD, elementalmapping and IR, we found changes in TMU-10 morphology also we have seen interestingsynergic effect on electrochemical performance. In next step we tried to enhance the materialelectrochemical properties and synthesized our new MOF composite in presence of rGO andachieved a more applicable composite. In final step we used synthesized composite as activematerial to prepare cathode electrode and design a supercapacitor (SC) high performance (table 1). The designed 2electrode supercapacitor showed good retention in 6000 charge-dischargecycles (92% retention) and interesting performance e.g turn on a watch for about 2h by only14mg active material. In this study we try to expand and survey some details that no one didn’tattended them till now, like as effect of MOF activation on its electrochemical performance, oreffect of contemporary MOFs synthesis on their morphologies.

نویسندگان

H Hesari

Department of Chemistry, Tarbiat Modares University, Tehran, Iran.

M.F Mousavi

Department of Chemistry, Tarbiat Modares University, Tehran, Iran.

M.S Rahmanifar

Faculty of Basic Sciences, Shahed University, Tehran, Iran.