کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6470184 1424104 2017 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Multiphase Ge-based Ge/FeGe/FeGe2/C composite anode for high performance lithium ion batteries
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Multiphase Ge-based Ge/FeGe/FeGe2/C composite anode for high performance lithium ion batteries
چکیده انگلیسی


- A multiphase Ge-based Ge/FeGe/FeGe2/C composite is prepared.
- The in-situ formed intermetallic compounds is conductive and act as buffer for volume expansion.
- The Ge/FeGe/FeGe2/C anodes exhibit good cycling stability and high rate capability.
- The synthetic route could be extended to other kinds of multiphase Ge-based composites.

A multiphase Ge-based Ge/FeGe/FeGe2/C (Fe-Ge-C) composite is prepared through the reaction between ferrous tartrate and GeO2 at Ar/H2 atmosphere, in which the active Ge, alloying components and amorphous carbon are generated synchronically. When evaluated as an anode material for lithium ion batteries, the Fe-Ge-C anode manifests an enhanced capacity of 1095 mA h g−1 at 0.1 A g−1 and with capacity retention of 890 mA h g−1 at 0.5 A g−1 over 400 cycles. A good rate capacity of 465 mA h g−1 at 10 A g−1 is also obtained. The synchronically formed conductive alloying components and amorphous carbon lead to the long cycle stability, and good rate capability. Furthermore, the synthetic route could be extended to the preparation of other kinds of multiphase Ge-based composites.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 253, 1 November 2017, Pages 522-529
نویسندگان
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