کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7726965 | 1497905 | 2016 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Cr and Si Substituted-LiCo0.9Fe0.1PO4: Structure, full and half Li-ion cell performance
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The use of LiCoPO4 as a Li-ion cathode material can enable high energy 5Â V batteries. However, LiCoPO4 shows limited cycle life and much less than theoretical energy density. In order to address these shortcomings, Fe, Cr and Si substituted-LiCoPO4(Cr,Si-LiCo0.9Fe0.1PO4) was investigated as an improved LiCoPO4 based cathode material. Fe substitution greatly improves the cycle life and increases the energy density. Cr substitution further increases the energy density, cycle life and rate capability. Si substitution reduces the reactivity of the cathode with electrolyte thereby increasing cycle life. In combination, the substituents lead to a LiCoPO4 based cathode material with no capacity fade over 250 cycles in Li/Cr,Si-LiCo0.9Fe0.1PO4 half cells, a discharge capacity of 140Â mAh gâ1 at C/3Â at an average discharge voltage of 4.78Â V giving an energy density of 670Â Wh per kg of cathode. In graphite/Cr,Si-LiCo0.9Fe0.1PO4 full Li-ion cells, the cathode material shows an energy density of 550Â Wh per kg of cathode material at 1C rate for the initial cycles and 510Â Wh per kg of cathode material at the 250th cycle.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 327, 30 September 2016, Pages 229-234
Journal: Journal of Power Sources - Volume 327, 30 September 2016, Pages 229-234
نویسندگان
Jan L. Allen, Joshua L. Allen, Travis Thompson, Samuel A. Delp, Jeff Wolfenstine, T. Richard Jow,