کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5149095 | 1497873 | 2017 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Construct hierarchical electrode with NixCo3-xS4 nanosheet coated on NiCo2O4 nanowire arrays grown on carbon fiber paper for high-performance asymmetric supercapacitors
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In order to boost the energy density of supercapacitors, the strategy of using advanced pseudo-capacitive electrode and asymmetric device architecture is feasible and effective. Herein, we report a significant advance in the design and synthesis of a new hierarchically nanostructures with a series of controllable Ni/Co molar ratios of NixCo3-xS4 (i.e., NiCo2S4 and Ni2CoS4) nanosheets coatings have in situ grown on NiCo2O4 nanowires arrays on a flexible carbon fiber paper (CFP). Remarkably, the hybrid Ni2CoS4@NiCo2O4 composite electrode delivers the highest discharge gravimetric capacitance of 1501Â FÂ gâ1, and areal capacitance of 1.86Â FÂ cmâ2 at 1Â mAÂ cmâ2. Furthermore, coupled with nitrogen-doped carbon xerogels anode, we have fabricated a 1.6Â V asymmetric supercapacitor (Ni2CoS4@NiCo2O4//nitrogen-doped carbon xerogels), such device delivers a maximum energy and power densities of 32.2Â Wh kgâ1 and 2.5Â kWÂ kgâ1 in 1.0Â M KOH electrolyte, respectively, and an excellent cycling stability (â¼87.6% retention after 10,000 cycles).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 359, 15 August 2017, Pages 262-269
Journal: Journal of Power Sources - Volume 359, 15 August 2017, Pages 262-269
نویسندگان
Liujun Cao, Gang Tang, Jun Mei, Hao Liu,