کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7744416 | 1498224 | 2018 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Microwave assisted synthesis, characterization and electrochemical performance of LiVPO4F cathode material
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
High-voltage cathode material, lithium vanadium fluorophosphate LiVPO4F, has been for the first time synthesized by a rapid two-step method based on microwave-assisted carbothermal reduction (CTR) and characterized with the use of scanning electron microscopy (SEM), X-ray diffraction and DTA/TG thermal analysis. Its electrochemical performance has been examined by galvanostatic charge-discharge cycling. Calculated lattice parameters of the obtained LiVPO4F compound were in accordance with literature. Its thermal stability up to 550â¯Â°C was confirmed. Charge-discharge cycling of LiVPO4F in the voltage range between 3.0â¯V and 4.4â¯V at a current rate of 7.75â¯mAâ
gâ1 (C/20) after 5â¯cycles showed a charge capacity of 90â¯mAâ
hâ
gâ1 and a discharge capacity of 58â¯mAâ
hâ
gâ1. For a current rate of 15.5â¯mAâ
gâ1 (C/10) after 10â¯cycles charge capacity achieved the value of 60â¯mAâ
hâ
gâ1 whereas the discharge capacity was of 52â¯mAâ
hâ
gâ1. The discharge plateau was at 4.18â¯V. The presented results suggest that LiVPO4F cathode material can be synthesized by the simplified two-step microwave-assisted reduction method. Although it needs to be further optimized, the method is simpler, faster and cheaper as compared to other preparation routes.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Ionics - Volume 319, June 2018, Pages 266-270
Journal: Solid State Ionics - Volume 319, June 2018, Pages 266-270
نویسندگان
Wioleta Ålubowska, Konrad Kwatek, Jan L. NowiÅski,