Flower-like Cu2NiSnS4 microspheres for application as electrodes of asymmetric supercapacitors endowed with high energy density

CrystEngComm ◽  
2018 ◽  
Vol 20 (10) ◽  
pp. 1443-1454 ◽  
Author(s):  
Samrat Sarkar ◽  
Promita Howli ◽  
Uttam Kumar Ghorai ◽  
Biswajit Das ◽  
Madhupriya Samanta ◽  
...  
Keyword(s):  
Energy Density ◽  
Specific Capacitance ◽  
High Energy ◽  
High Energy Density ◽  
Environmentally Benign ◽  
Asymmetric Supercapacitors ◽  
Chalcogenide Material

Asymmetric supercapacitors with superior specific capacitance and energy density are fabricated using Cu2NiSnS4, a novel and environmentally benign chalcogenide material.

scholarly journals Porous Fe2O3 Nanorods on Hierarchical Porous Biomass Carbon as Advanced Anode for High-Energy-Density Asymmetric Supercapacitors

2020 ◽  
Vol 8 ◽  
Author(s):  
Pingping Yu ◽  
Wei Duan ◽  
Yanfeng Jiang
Keyword(s):  
Energy Density ◽  
Specific Capacitance ◽  
Negative Electrode ◽  
High Energy ◽  
High Energy Density ◽  
Electrochemical Performances ◽  
Energy Storage Devices ◽  
Hydrothermal Route ◽  
Asymmetric Supercapacitors ◽  
Hierarchical Porous

In this study, a novel negative electrode material was prepared by aligning α-Fe2O3 nanorods on a hierarchical porous carbon (HPC) skeleton. The skeleton was derived from wheat flour by a facile hydrothermal route to enhance conductivity, improve surface properties, and achieve substantially good electrochemical performances. The α-Fe2O3/HPC electrode exhibits enhanced specific capacitance of 706 F g−1, which is twice higher than that of α-Fe2O3. The advanced α-Fe2O3/HPC//PANI/HPC asymmetrical supercapacitor was built with an expanded voltage of 2.0 V in 1 M Li2SO4, possessing a specific capacitance of 212 F g−1 at 1 A g−1 and a maximum energy density of 117 Wh kg−1 at 1.0 kW kg−1, along with an excellent stability of 5.8% decay in capacitance after 5,000 cycles. This study affords a simple process to develop asymmetric supercapacitors, which exhibit high electrochemical performances and are applicable in next-generation energy storage devices, based on α-Fe2O3 hybrid materials.

Integrated copper–nickel oxide mesoporous nanowire arrays for high energy density aqueous asymmetric supercapacitors

2016 ◽  
Vol 1 (2) ◽  
pp. 150-155 ◽  
Author(s):  
Ruizhi Li ◽  
Zhijun Lin ◽  
Xin Ba ◽  
Yuanyuan Li ◽  
Ruimin Ding ◽  
...  
Keyword(s):  
Energy Density ◽  
Nickel Oxide ◽  
Specific Capacitance ◽  
High Performance ◽  
Nanowire Array ◽  
High Specific Capacitance ◽  
High Energy ◽  
Nanowire Arrays ◽  
High Energy Density ◽  
Asymmetric Supercapacitors

An integrated (Cu,Ni)O mesoporous nanowire array that delivers a high specific capacitance has been used to construct high-performance aqueous asymmetric supercapacitors of (Cu,Ni)O(+)//AC(−).

The perfect matching between the low-cost Fe2O3 nanowire anode and the NiO nanoflake cathode significantly enhances the energy density of asymmetric supercapacitors

2015 ◽  
Vol 3 (12) ◽  
pp. 6662-6670 ◽  
Author(s):  
Qianqiu Tang ◽  
Wenqiang Wang ◽  
Gengchao Wang
Keyword(s):  
Energy Density ◽  
Specific Capacitance ◽  
Perfect Matching ◽  
Low Cost ◽  
High Specific Capacitance ◽  
High Energy ◽  
High Energy Density ◽  
Asymmetric Supercapacitors

A novel low-cost anode of homogenous Fe2O3 nanowires on CFP was developed, achieving a high specific capacitance in 0 to −1.35 V. Matching it with the NiO nanoflake cathode, an extremely high energy density of 105 W h kg−1 is obtained at 1400 W kg−1.

Advanced asymmetric supercapacitors based on Ni3(PO4)2@GO and Fe2O3@GO electrodes with high specific capacitance and high energy density

RSC Advances ◽  
2015 ◽  
Vol 5 (52) ◽  
pp. 41721-41728 ◽  
Author(s):  
Jia-Jia Li ◽  
Mao-Cheng Liu ◽  
Ling-Bin Kong ◽  
Dan Wang ◽  
Yu-Mei Hu ◽  
...  
Keyword(s):  
Energy Density ◽  
Specific Capacitance ◽  
Electrode Materials ◽  
High Specific Capacitance ◽  
High Energy ◽  
High Energy Density ◽  
Asymmetric Supercapacitor ◽  
Asymmetric Supercapacitors

Ni3(PO4)2@GO and Fe2O3@GO have been successfully synthesized as electrode materials, and they have been used to assemble an asymmetric supercapacitor (Fe2O3@GO//Ni3(PO4)2@GO), which exhibited a high energy density.

scholarly journals Fabrication of Hierarchical NiMoO4/NiMoO4 Nanoflowers on Highly Conductive Flexible Nickel Foam Substrate as a Capacitive Electrode Material for Supercapacitors with Enhanced Electrochemical Performance

Energies ◽  
2019 ◽  
Vol 12 (6) ◽  
pp. 1143 ◽  
Author(s):  
Anil Yedluri ◽  
Tarugu Anitha ◽  
Hee-Je Kim
Keyword(s):  
Energy Density ◽  
Electrochemical Performance ◽  
Specific Capacitance ◽  
Electrode Material ◽  
High Performance ◽  
Nickel Foam ◽  
High Specific Capacitance ◽  
High Energy ◽  
High Energy Density ◽  
Charge Discharge

Hierarchical NiMoO4/NiMoO4 nanoflowers were fabricated on highly conductive flexible nickel foam (NF) substrates using a facile hydrothermal method to achieve rapid charge-discharge ability, high energy density, long cycling lifespan, and higher flexibility for high-performance supercapacitor electrode materials. The synthesized composite electrode material, NF/NiMoO4/NiMoO4 with a nanoball-like NF/NiMoO4 structure on a NiMoO4 surface over a NF substrate, formed a three-dimensional interconnected porous network for high-performance electrodes. The novel NF/NiMoO4/NiMoO4 nanoflowers not only enhanced the large surface area and increased the electrochemical activity, but also provided an enhanced rapid ion diffusion path and reduced the charge transfer resistance of the entire electrode effectively. The NF/NiMoO4/NiMoO4 composite exhibited significantly improved supercapacitor performance in terms of a sustained cycling life, high specific capacitance, rapid charge-discharge capability, high energy density, and good rate capability. Electrochemical analysis of the NF/NiMoO4/NiMoO4 nanoflowers fabricated on the NF substrate revealed ultra-high electrochemical performance with a high specific capacitance of 2121 F g−1 at 12 mA g−1 in a 3 M KOH electrolyte and 98.7% capacitance retention after 3000 cycles at 14 mA g−1. This performance was superior to the NF/NiMoO4 nanoball electrode (1672 F g−1 at 12 mA g−1 and capacitance retention 93.4% cycles). Most importantly, the SC (NF/NiMoO4/NiMoO4) device displayed a maximum energy density of 47.13 W h kg−1, which was significantly higher than that of NF/NiMoO4 (37.1 W h kg−1). Overall, the NF/NiMoO4/NiMoO4 composite is a suitable material for supercapacitor applications.

High energy density asymmetric supercapacitors based on MOF-derived nanoporous carbon/manganese dioxide hybrids

2017 ◽  
Vol 322 ◽  
pp. 582-589 ◽  
Author(s):  
Mengyao Yao ◽  
Xin Zhao ◽  
Lei Jin ◽  
Fangyuan Zhao ◽  
Junxian Zhang ◽  
...  
Keyword(s):  
Energy Density ◽  
Manganese Dioxide ◽  
High Energy ◽  
Nanoporous Carbon ◽  
High Energy Density ◽  
Asymmetric Supercapacitors

Construction of mesoporous Cu-doped Co9S8 rectangular nanotube arrays for high energy density all-solid-state asymmetric supercapacitors

2019 ◽  
Vol 7 (10) ◽  
pp. 5333-5343 ◽  
Author(s):  
Wen Lu ◽  
Ze Yuan ◽  
Chunyang Xu ◽  
Jiqiang Ning ◽  
Yijun Zhong ◽  
...  
Keyword(s):  
Solid State ◽  
Energy Density ◽  
Power Density ◽  
High Energy ◽  
High Energy Density ◽  
Nanotube Arrays ◽  
Asymmetric Supercapacitors

A self-templating strategy was used to prepare novel mesoporous Cu-doped Co9S8 rectangular nanotube arrays (Cu-Co9S8 NTAs) as an advanced electrode for all-solid-state asymmetric supercapacitors, which deliver a high energy density of 71.93 W h kg−1 at a power density of 750 W kg−1.

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