کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1616617 1005665 2012 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis and characterization of in situ carbon-coated Li2FeSiO4 cathode materials for lithium ion battery
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Synthesis and characterization of in situ carbon-coated Li2FeSiO4 cathode materials for lithium ion battery
چکیده انگلیسی

Li2FeSiO4/C composites with in situ carbon coating were synthesized via sol–gel method based on acid-catalyzed hydrolysis/condensation of tetraethoxysilane (TEOS) with sucrose and l-ascorbic acid as carbon additives, respectively. As-obtained Li2FeSiO4/C composites prepared with l-ascorbic acid as a carbon additive are composed of nanoparticulate Li2FeSiO4 in an intimate contact with a continuous thin layer of residual carbon and exhibit large specific surface area up to 395.7 m2 g−1. The results indicate that structure of the residual carbon is graphene-rich with obviously lower disordered/graphene (D/G) ratio. These as-obtained Li2FeSiO4/C composites exhibit first discharge capacity of 135.3 mAh g−1 at C/16 and perform cycling stability, which are superior to those of Li2FeSiO4/C composites synthesized with sucrose as a carbon additive.


► Sucrose and l-ascorbic acid as carbon additives.
► Li2FeSiO4/C were obtained under our carbon coating experimental conditions.
► Graphite-rich carbon was formed uniformly when ascorbic acid was employed.
► The composites employing l-ascorbic acid exhibited a large specific surface area.
► Sample using l-ascorbic acid exhibited better rate performance and cycling stability.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 511, Issue 1, 15 January 2012, Pages 101–106
نویسندگان
, , , , ,