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Evaluation of NP-MnFe2O4 as an Efficient Nanocatalyst for Air Cathode and 1-Octyl-3-methyl Imidazolium Hexafluorophosphate [Omim][PF6] as a Green Electrolyte in Rechargeable lithium-Air Battery | ||
| Iranian Journal of Analytical Chemistry | ||
| مقاله 15، دوره 6، شماره 2 - شماره پیاپی 12، آذر 2019، صفحه 54-62 اصل مقاله (1.31 M) | ||
| نوع مقاله: Full research article | ||
| شناسه دیجیتال (DOI): 10.30473/ijac.2019.46621.1148 | ||
| نویسندگان | ||
| Mehdi Hosseini* ؛ Mousa Soleymani؛ Hossein Dashti Khavidaki | ||
| Department of Chemistry, Faculty of Basic Science, Ayatollah Boroujerdi University, Boroujerd, Iran. | ||
| چکیده | ||
| A simple, new and low-cost design of Li-air battery was introduced. An effective synthesized nanocatalyst for modifiying of air cathode, filter paper as a simple separator and a conductive ionic liquid namely 1-Octyl-3-methyl imidazolium hexafluorophosphate abbreviated [Omim][PF6] as a non-aqueous and green electrolyte in battery were used. The MnFe2O4 nanoparticles (NP-MnFe2O4) which consistingof transition metal-metal oxide components was synthesized in our labrature. High discharge capacity, non-flammability of electrolyte, high reversibility, long lifetime and low over potential were observed in electrochemical tests of the battery. Synthesized nanocatalyst was characterized using XRD, FTIR and SEM techniques. XRD results show that a nanocatalyst have a particle sizes of 16-28 nm that distributed on cathode uniformly and performance of battery was improved to more than 1000 cycles compared to battery without any catalyst. The discharge capacity at current density of 0.2 mA cm-2 and charge potential range of 2.0-4.2 V for battery with catalyst/green electrolyte and without catalyst/common organic electrolyte were 3391 and 1012 mAh g-1,respectively. Furthermore, the usage of an ionic liquid as electrolyte leads to the increase the safety and lifetime of battery. Because of used electrolyte have high boiling point amount (>350 Celcius), so if it released to the environment due to the destruction or life expires of battery, don’t seriously damage to the environment because it is not easily evaporated. | ||
| کلیدواژه‌ها | ||
| Li-air Battery؛ Simple Design؛ Nano-Catalyst of MnFe2O4؛ Ionic Liquids؛ Green Electrolyte؛ High Discharge Capacity | ||
| عنوان مقاله [English] | ||
| بررسی نانوذرات NP-MnFe2O4 به عنوان کاتالیسیت موثر برای کاتد هوا و الکترولیت سبز 1-اکتیل-3-متیل ایمیدازولیوم هگزافلوئوروفسفات [Omim][PF6 در باتری قابل شارژ لیتیم-هوا | ||
| نویسندگان [English] | ||
| مهدی حسینی؛ موسی سلیمانی؛ حسین دشتی خویدکی | ||
| گروه شیمی، دانشکده علوم پایه، دانشگاه آیت ا...بروجردی، بروجرد، ایران | ||
| چکیده [English] | ||
| یک طراحی ساده، جدید و کم هزینه برای باتری لیتیم-هوا معرفی شده است. یک نانوکاتالیست کارا و موثر برای اصلاح کاتد هوا، کاغذ صافی به عنوان جدا کننده ساده و مایع یونی رسانای 1-اکتیل-3-متیل ایمیدازولیوم هگزافلوئوروفسفات با نام اختصار [Omim][PF6] به عنوان الکترولیت غیر آبی و سبز (دوست دار محیط زیست) باتری بکار برده شده است. نانوذرات MnFe2O4 شامل اکسید فلزات-فلزات واسطه بوده و در آزمایشگاه تحقیقاتی ما سنتز شده است. ظرفیت دشارژ بالا، الکترولیت غیر قابل اشتعال، برگشت پذیری بالا، طول عمر زیاد و اورولتاژ کم در تست‌های الکتروشیمیایی باتری مشاهده شد. نانوکاتالیست سنتز شده بوسیله تکنیک‌های XRD، FTR و SEM مشخصه یابی شد. نتایج XRD نشان داد که نانوکاتالیست دارای اندازه ذرات بین 16-28 نانومتر بوده که به طور یکنواخت بر روی کاتد پراکنده شده و کارایی آن به بیش از 1000 سیکل در مقایسه با باتری بدون کاتالیست افزایش یافته است. ظرفیت دشارژ در دانسیته جریان mA cm-2 2/0 و پتانسیل شارژ 0/2 تا 2/4 ولت برای باتری دارای کاتالیست/الکترولیت یونی و بدون حضور کاتالیست/الکترولیت آلی به ترتیب برابر باmAh g-1 3391 و 1012 حاصل شد. علاوه بر این، استفاده از مایعات یونی به عنوان الکترولیت باعث افزایش ایمنی و طول عمر باتری شده است. بخاطر اینکه الکترولیت مورد استفاده دارای نقطه جوش بیشتر از 350 درجه سلسیوس می‌باشد، بنابراین اگر به دلیل پایان یافتن عمر باتری یا تخریب آن وارد محیط زیست گردد، براحتی تبحیر نمی گردد. | ||
| کلیدواژه‌ها [English] | ||
| باتری لیتیم-هوا, طراحی ساده, نانوکاتالیست MnFe2O4, مایعات یونی, الکترولیت سبز, ظرفیت دشارژ بالا | ||
| مراجع | ||
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