نویسندگان
1 پژوهشگاه مواد و انرژی، پژوهشکده فناوری نانو ومواد پیشرفته، کرج، ایران.
2 دانشگاه علم و صنعت ایران، گروه مهندسی مواد ، تهران، ایران.
3 دانشگاه صنعتی مالک اشتر تهران، گروه مهندسی شیمی، تهران، ایران.
چکیده
در این پژوهش، پودر کاتدی LiNi0.5Mn0.3Co0.2O2 به روش سنتز احتراقی محلول اسیدسیتریک/ نیترات تولید گردید. اثر نسبت سوخت به اکسیدکننده (5/0، 75/0، 1 و 5/1)= F/O و هم‌چنین اثر تغییرات دمای کلسیناسیون (700 ، 800 ، 850 و900 درجه سانتی‌گراد) بر روی تغییرات ساختاری و عملکرد الکتروشیمیایی نمونه‌ها بررسی شد. تحولات ساختاری پودرهای سنتز شده توسط آنالیز حرارتی افتراقی (DTA )، آنالیز پراش اشعه ایکس (XRD )، طیفسنج نشری پلاسمای جفت شده القایی (OES-ICP) و میکروسکوپ الکترونی روبشی گسیل میدانی (FESEM ) مطالعه شد. علاوه براین، تاثیر دمای کلسیناسیون بر عملکرد الکتروشیمیایی نمونه‌ها توسط آزمون شارژ/ تخلیه و سیکل‌پذیری ارزیابی شد. نتایج نشان داد که بهترین عملکرد الکتروشیمیایی با ظرفیت تخلیه mAh/g 159 در جریان ثابت mA/cm2 1/0 و سیکل‌پذیری 95% بعد از 20 سیکل مربوط به نمونه کلسینه شده در دمای ℃ 850 و نسبت 1=F/O است. بهبود عملکرد الکتروشیمیایی در این نمونه با افزایش نظم کاتیونی لایه‌ها و هم‌چنین کاهش مسیر نفوذ یونی ذرات یکنواخت نانومتری قابل توجیه است.
کلیدواژه‌ها
عنوان مقاله [English]
Effect of Calcination Temperature and Fuel to Oxidant Ratio for Synthesis of Li Ni0.5Mn0.3Co0.2 Cathode Powder for Li-ion Battery Via Solution Combustion Method
نویسندگان [English]
- Milad Ghorbanzadeh 1
- Mohammad Mehdi Hadavi 1
- Reza Riahifar 1
- Masoud Mohammadi Rahvard 2
- Ramin Badrnezhad 3
1 Materials and Energy Research Center, Karaj, Iran
2 Iran University of Science and Technology, Tehran, Iran.
3 Malek Ashtar University of Technology, Teheran, Iran.
چکیده [English]
Single phase LiNi0.5Mn0.3Co0.2O2 compound were prepared via acid citric-nitrate combustion method. The
effect of F/O= (0.5, 0.75,1 and 1.5) and calcination temperature (700, 800, 850 and 900Ԩ ) on the structural and
electrochemical properties were investigated. The structural evolution was assessed by thermo gravimetric
analysis/simultaneous differential thermal analysis (DTA), X-ray diffraction (XRD), inductively coupled plasma optical
emission spectrometry (ICP-OES) and field emission scanning electron microscopy (FESEM) experiments. The
electrochemical performance was evaluated by analyzing the charge/discharge profiles and cycling stability. The results
show that the best electrochemical performance with 159 mAh/g discharge capacity in 0.1 mA/cm2 current density and
95% cycling stability after 20 cycles for sample of calcination temperature of 850Ԩ and F/O=1. The improved
electrochemical behavior is closely connected to the reduction of the cation mixing after metal substitution and
reduction of ion diffusion path for Nano particles size.
کلیدواژه‌ها [English]
- Solution Combustion method
- calcination temperature
- F/O ratio
- Li Ni0.5Mn0.3Co0.2 cathode powder
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