کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5148820 1497870 2017 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
High performance binder-free SiOx/C composite LIB electrode made of SiOx and lignin
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
High performance binder-free SiOx/C composite LIB electrode made of SiOx and lignin
چکیده انگلیسی
A high performance binder-free SiOx/C composite electrode was synthesized by mixing SiOx particles and Kraft lignin in a cryo-mill followed by heat treatment at 600 °C. After the heat treatment, lignin formed a conductive matrix hosting SiOx particles, ensuring electronic conductivity, connectivity, and accommodation of volume changes during lithiation/delithiation. As the result, no conventional binder or conductive agent was necessary. When electrochemically cycled, the composite electrode delivered excellent performance, maintaining ∼900 mAh g−1 after 250 cycles at a rate of 200 mA g−1, and good rate capability. The robustness of the electrode was also examined by post-cycling SEM images, where few cracks were observed. The excellent electrochemical performance can be attributed to the comparatively small volume change of SiOx-based electrodes (160%) and the flexibility of the lignin derived carbon matrix to accommodate the volume change. This work should stimulate further interests in using bio-renewable resources in making advanced electrochemical energy storage systems.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 362, 15 September 2017, Pages 236-242
نویسندگان
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