کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5461301 | 1516198 | 2017 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Hollow lithium manganese oxide nanotubes using MnO2-carbon nanofiber composites as cathode materials for hybrid capacitors
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
To improve the electrochemical performance of hybrid capacitors, hollow lithium manganese oxide (LiMn2O4, LMO) nanotubes (NTs) as cathode materials were synthesized by a solid-state reaction, using MnO2 coated on a porous carbon nanofiber (PCNF) templates. To determine the optimum shell thickness of hollow LMO, the time of MnO2 coating on PCNF was adjusted to 10, 30, and 60 min. Among these, hollow LMO NTs, which were synthesized by 30-min coating with MnO2 on the PCNFs, have superior performance. They exhibited an excellent reversible capacity (â¼72.8 mAh gâ1) at 1 C, capacity retention of â¼98.4% after 100 cycles, and an excellent high-rate capability. This superior performance can be explained by the hollow structure giving a reduced diffusion distance for Li-ions, the networked structure of one-dimensional NTs allowing fast charge transfer, and the achievement of the optimal stoichiometric ratio of the LMO phase.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 696, 5 March 2017, Pages 290-294
Journal: Journal of Alloys and Compounds - Volume 696, 5 March 2017, Pages 290-294
نویسندگان
Dong-Yo Sin, Bon-Ryul Koo, Hyo-Jin Ahn,