|کد مقاله||کد نشریه||سال انتشار||مقاله انگلیسی||ترجمه فارسی||نسخه تمام متن|
|5431489||1398022||2018||8 صفحه PDF||ندارد||دانلود رایگان|
Ultrahigh level nitrogen and sulfur co-doped disordered porous carbon (NSDPC) was facilely synthesized and applied as anode materials for lithium-ion batteries (LIBs). Benefiting from high nitrogen (14.0Â wt%) and sulfur (21.1Â wt%) doping, electrode fabricated from NS1/3 showed a high reversible capacity of 1188Â mAÂ hÂ gâ1Â at 0.1Â AÂ gâ1 in the first cycle with a high initial columbic efficiency (>75%). In addition, prolonged life over 500 cycles and excellent rate capability of 463Â mAÂ hÂ gâ1Â at 5Â AÂ gâ1 have been realized. The preeminent electrochemical performance is attributed to three effects: (1) the high level of sulfur and nitrogen; (2) the synergic effect of dual-doping heteroatoms in cooperation with each other; (3) the large quantity of edge defects and abundant micropores and mesopores that can provide extra Li storage regions. These unique features of NSDPC electrodes suggest that they can serve as a practical substitute for graphite as a high performance anode material in LIBs.
Graphical abstractDownload high-res image (253KB)Download full-size image
Journal: Carbon - Volume 126, January 2018, Pages 85-92