کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7834912 | 1503530 | 2018 | 34 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Template-free fabrication of hollow N-doped carbon sphere (h-NCS) to synthesize h-NCS@PANI positive material for MoO3//h-NCS@PANI asymmetric supercapacitor
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Asymmetric supercapacitors (ASCs) based on pseudocapacitor electrode materials are vital to improve the electrochemical properties of devices in aqueous electrolytes. This study fabricates hollow N-doped carbon sphere (h-NCS) to produce h-NCS@PANI nanocomposite as positive electrode and α-MoO3 as negative electrode to assemble ASC device. In particular, a facile template-free synthesis method, catalyzed by Cu2+, is used to prepare hollow PANI nanosphere precursor to build h-NCS. The mechanism of the precursor formation is illustrated in detail. After polymerization of PANI on the surface of h-NCS, the capacitance increases to 327â¯Fâ¯gâ1 at 1â¯Aâ¯gâ1. Furthermore, a hydrothermal reaction is carried out to produce α-MoO3 negative electrode material. The maximum specific capacitance of 720â¯Fâ¯gâ1 is achieved at 1â¯Aâ¯gâ1. The obtained h-NCS@PANI and α-MoO3 are utilized to construct an ASC device. The electrochemical properties of this device are investigated comprehensively. The maximum energy density of 34.1â¯Wâ¯hâ¯kgâ1 and power density of 9350.6â¯Wâ¯kgâ1 are observed, which provide an insight into the development of ASCs.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 442, 1 June 2018, Pages 476-486
Journal: Applied Surface Science - Volume 442, 1 June 2018, Pages 476-486
نویسندگان
Xiaoqin Li, Xinxin Xiang, Yunhua Liu, Dan Xiao,