کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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6471845 | 1424125 | 2017 | 13 صفحه PDF | دانلود رایگان |
Transition-metal phosphates have been extensively studied as potential electrode materials for lithium-ion batteries. For this application, high rate capability and cycling performance are required. In this work, we present a one-pot solvothermal synthesis process in combination with in situ carbonization for the tailoring of Li3V2(PO4)3/C morphologies with improvements of the electrochemical performance. These include an unstructured cluster, a needle-like microstructure, a flake-like microstructure and a hollowsphere microstructure. We demonstrate a significant impact of the particle morphology with respect to the electrochemical performance. The results obtained include, for instance, needle-like Li3V2(PO4)3/C showing a superior rate capability of about 72% (â¼96 mAh gâ1) of its theoretical capacity being maintained at 30Â C, whereas the flake-like Li3V2(PO4)3/C exhibits outstanding cycling performance with a capacity retention of 97.1% (â¼112 mAh gâ1) of its initial capacity after 1000 cycles at 2Â C. Our work demonstrates that the morphology of cathode particles defines a highly selective parameter to improve the electrochemical properties. Accordingly, strategies to selectively tailor particle morphology for a given application become feasible.
Journal: Electrochimica Acta - Volume 232, 1 April 2017, Pages 310-322