کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6616995 | 459625 | 2013 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Maleic-anhydride-grafted ketjen black as the alternative carbon additive for LiFePO4 cathode
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Ketjen black (KB) has a large specific surface area and is potentially more effective as the cathode conductive additive. However, large KB flakes often overlay together to form thick stacks. In order to overcome this problem, maleic anhydride (MA) was grafted onto the KB surface by a plasma-induced method. Such a MA-KB additive was found to have a more homogeneous distribution in the LiFePO4 cathode, which resulted in a reduction in the electrical resistivity and electrode polarization. As the consequence, greatly improved cell performance was achieved, including higher capacity, higher discharge voltage, higher rate capability, longer cycle lifetime, and a much flatter discharge curve. Detailed analysis on the discharge curves and the electrochemical impedance spectroscopy showed that although both the electrical resistivity and electrode polarization were reduced by the better distribution of the MA-KB additive, the reduction in electrode polarization was more important in cutting the capacity loss.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 107, 30 September 2013, Pages 503-508
Journal: Electrochimica Acta - Volume 107, 30 September 2013, Pages 503-508
نویسندگان
Te-Kang Chen, Xiaoding Qi, Chuh-Yung Chen, Chia-Chin Chang, Wei-Che Chang,