کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1288580 1498030 2012 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis of LiCoMnO4 via a sol–gel method and its application in high power LiCoMnO4/Li4Ti5O12 lithium-ion batteries
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Synthesis of LiCoMnO4 via a sol–gel method and its application in high power LiCoMnO4/Li4Ti5O12 lithium-ion batteries
چکیده انگلیسی

A LiCoMnO4 (5 V spinel) material has been synthesized by annealing a sol–gel precursor utilizing lithium acetate, cobalt acetate, manganese acetate, and citric acid. The as-prepared sample has been determined to be LiCo1.09Mn0.91O4 via inductive coupled plasma-atomic emission spectroscopy. The deviation of the molar ratio of Co/Mn from 1:1 is designed to minimize the amount of LiMn2O4 impurity in our sample. The produced spinel material possesses an initial discharge capacity of 87.1 mAh g−1 with two voltage plateaus at 5.1 and 4.9 V. The LiCo1.09Mn0.91O4 cathode has been assembled with a Li4Ti5O12 anode to form a full-cell which delivered a discharge capacity of 131.2 mAh g−1, centered at 3.2 V. It is of great interest that despite the low coulombic efficiency of the full-cell, it shows good cyclic performance. In addition, The LiCo1.09Mn0.91O4/Li4Ti5O12 cell shows an excellent rate capability, delivering a capacity of 84.2 mAh g−1, corresponding to a high power density of 4.70 kW kg−1 at the current density of 1700 mA g−1.


► A LiCoMnO4 was synthesized via sol–gel method.
► The 4-V plateau was deliberately eliminated successfully.
► The LiCoMnO4/Li4Ti5O12 cell delivered 131.2 mAh g−1 at 170 mA (g(Li4Ti5O12))−1.
► The full-cell shows good cycleability despite its low initial coulombic efficient.
► The full-cell shows a high power density of 4.70 kW kg−1 at 1700 mA g−1.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 202, 15 March 2012, Pages 352–356
نویسندگان
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