کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7731570 | 1497939 | 2015 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Nitrogen-doped 3D macroporous graphene frameworks as anode for high performance lithium-ion batteries
ترجمه فارسی عنوان
چارچوب گرافن سه بعدی نیتروژن به عنوان آند برای باتری لیتیوم یون با کارایی بالا
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
چکیده انگلیسی
Nitrogen-doped 3D graphene frameworks (N-3D GFs) were synthesized by a facile two-step method: Polystyrene (PS) encapsulated in graphene oxide (GO) composites (denoted as PS@GO) are first synthesized, followed by a post-thermal annealing in ammonia step to get N-doped 3D GFs. The resulting N-3D GFs inherit the advantages of graphene, which possesses high electrical conductivity and high specific surface area. Furthermore, the well-defined 3D interconnected structure can facilitate the access of the electrolyte to the electrode surface, thus shortening the diffusion length of both Li+/eâ, keeping the overall electrode highly conductive and active in lithium storage. Simultaneously, the in-situ formation of pyridinic N and pyrrolic N in 3D GFs provide high electronic conductivity and structure stability for lithium storage. The designed N-3D GFs electrode delivers a high specific capacity of 1094Â mAhgâ1 after 100 cycles at 200Â mAgâ1 and superior rate capability (691Â mAhgâ1 after 500 cycles at 1000Â mAgâ1) when used as anode for LIBs. We believe that such an inherently inexpensive, scalable, facile method can significantly increase the feasibility of building high performance energy storage system.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 293, 20 October 2015, Pages 799-805
Journal: Journal of Power Sources - Volume 293, 20 October 2015, Pages 799-805
نویسندگان
Xiaowu Liu, Ying Wu, Zhenzhong Yang, Fusen Pan, Xiongwu Zhong, Jiaqing Wang, Lin Gu, Yan Yu,