Journal ArticleDOI
Design of unique porous carbons with double support structure: toward overall performance by employing bidirectional anchoring strategy
TLDR
Wang et al. as mentioned in this paper developed coralloid-like porous carbon sheets (CPCS) with double support structure via a bidirectional anchoring strategy, exhibiting ultra-low specific surface area (26.95 m2 g−1) and moderate packing density (0.75 g cm−3).Abstract:
Supercapacitors are highly attractive in the large-scale energy storage field, but the “trade-off” between the gravimetric capacitance and the volume and area specific capacitance greatly affects their further development. In this work, we developed coralloid-like porous carbon sheets (CPCS) with double support structure via a bidirectional anchoring strategy, exhibiting ultra-low specific surface area (26.95 m2 g−1) and moderate packing density (0.75 g cm−3). In the meantime, the proposed dual-anchor structure model made the interior “self-doping” defects and the exterior “foreign-doping” defects fully exposed, which is seldom obtained by other artificial methods. Based on this, it delivered a superior overall performance in gravimetric, volumetric, and areal capacitances (308.89 F g−1, 231.67 F cm−3, and 1146 μF cm−2) and stable cyclability (10 000 cycles), which is the highest capacitance reported for polyacrylonitrile-based hard carbon without chemical/physical activation. Considering the low-energy and innovative synthesis route, our work may shed some light on developing advanced carbons promising for supercapacitors.read more
Citations
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Heteroatom-doped porous carbon derived from zeolite imidazole framework/polymer core-shell fibers as an electrode material for supercapacitor
Chengwei Ye,Lan Xu +1 more
TL;DR: In this paper, the core-shell fibers with dense zeolite imidazole framework (ZIF) coating were synthesized on the electrospun composite nanofiber substrate by a rapid in-situ growth strategy.
Journal ArticleDOI
Design of carbon aerogels with variable surface morphology for electromagnetic wave absorption
TL;DR: In this paper , carbon aerogels modified by carbon microspheres with different morphologies were prepared by controlling reaction parameters and carbonization process, and the integral pouring method was proposed to test the electromagnetic parameters for the first time.
Journal ArticleDOI
Self-supported VO(PO3)2 electrode for 2.8 V symmetric aqueous supercapacitors
TL;DR: In this article , a vanadium phosphate (VPO) of the VO(PO3)2 aerogel as the electrode to enlarge the device voltage, which could effectively raise HER/OER overpotentials and thus achieving a stable wide electrochemical window of −1 ∼ 1 V with remarkably improved capacitance.
Journal ArticleDOI
Use of polyacrylonitrile-based carbon nanolayer modified Co3S4 to improve the overall performance of supercapacitors
TL;DR: In this article, polyacrylonitrile polymer layer modified Co3S4 microspheres are anchored on a Ni foam substrate and then subjected to high-temperature carbonization to prepare a Carbon@Co3S 4/Ni 3S 2/NF core-shell composite electrode.
Journal ArticleDOI
Gradient architecture to boost the electrochemical capacitance of hard carbon
Qi Liu,Weiqun Gong,Shengnan Li,Chenyang Zhao,Dandan Xu,Yujing Liu,Ziyin Yang,Xiao Bai,Anguo Ying +8 more
TL;DR: In this article, the authors developed carbon/carbon gradient-structured microspheres (CCGMs) by the strategy of third-order graduation polymerization and dynamic radical oxidation, and the CCGMs exhibited three-ultrahigh performance with gravimetric, volumetric, and areal capacitances of 408.23, 741.11, and 4390, respectively.
References
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Journal ArticleDOI
Nitrogen-doped mesoporous carbon of extraordinary capacitance for electrochemical energy storage
Tianquan Lin,I-Wei Chen,Fengxin Liu,Chongyin Yang,Hui Bi,Fangfang Xu,Fuqiang Huang,Fuqiang Huang +7 more
TL;DR: It is found that a nitrogen-doped ordered mesoporous few-layer carbon has a capacitance of 855 farads per gram in aqueous electrolytes and can be bipolarly charged or discharged at a fast, carbon-like speed and can store a specific energy of 41 watt-hours per kilogram (19.5 watt- hours per liter).
Journal ArticleDOI
Efficient storage mechanisms for building better supercapacitors
Mathieu Salanne,Mathieu Salanne,Mathieu Salanne,Benjamin Rotenberg,Benjamin Rotenberg,Katsuhiko Naoi,Katsumi Kaneko,Pierre-Louis Taberna,Pierre-Louis Taberna,Clare P. Grey,Bruce Dunn,Patrice Simon,Patrice Simon,Patrice Simon +13 more
TL;DR: In this paper, the authors review recent progress, from both in situ experiments and advanced simulation techniques, in understanding the charge storage mechanism in carbon- and oxide-based supercapacitors.
Journal ArticleDOI
Doping carbons beyond nitrogen: an overview of advanced heteroatom doped carbons with boron, sulphur and phosphorus for energy applications
TL;DR: In this paper, a state-of-the-art update on the most recent developments concerning the advanced heteroatom doping of carbon that goes beyond nitrogen is given, with respect to their boron-, sulphur-and phosphorus-doping.
Journal ArticleDOI
"Inner" and "outer" active surface of RuO2 electrodes
TL;DR: In this paper, the dependence of the voltammetric surface charge q* on solution pH and potential scan rate has been investigated using a set of RuO2 electrodes prepared by thermal decomposition of RuCl3 at temperatures in the range 300-500°C.
Journal ArticleDOI
Synthesis of functionalized 3D hierarchical porous carbon for high-performance supercapacitors
Long Qie,Wei-Min Chen,Henghui Xu,Xiaoqin Xiong,Yan Jiang,Feng Zou,Xianluo Hu,Ying Xin,Zhaoliang Zhang,Yunhui Huang +9 more
TL;DR: In this paper, a functionalized three-dimensional hierarchical porous carbon (THPC) is prepared via a facile modified chemical activation route with polypyrrole microsheets as precursor and KOH as activating agent.