scholarly journals Hierarchical Ni2P@Ni(OH)2 Architectures Supported On Carbon Cloth As Battery-Type Electrodes For Hybrid Supercapacitors With Boosting Specific Capacitance and Cycle Stability

2021 ◽  
Author(s):  
Yingying Lan ◽  
Hongna Xing ◽  
Yan Zong ◽  
Yong Sun ◽  
Linxue Zhang ◽  
...  
Keyword(s):  
Specific Capacitance ◽  
High Energy ◽  
High Energy Density ◽  
Hierarchical Architecture ◽  
Carbon Cloth ◽  
Electrochemical Characteristics ◽  
Cycle Stability ◽  
Hybrid Supercapacitors ◽  
Nanosheet Arrays ◽  
High Electronic Conductivity

Abstract In this work, a novel binder-free electrode, in which three-dimensional porous Ni2P@Ni(OH)2 nanosheet arrays were in-situ grown on carbon cloth (CC), is rationally designed for supercapacitor applications. In comparison with Ni2P@CC, the Ni2P@Ni(OH)2@CC electrode represents superior electrochemical characteristics: the gravimetric capacitance and areal capacitance are boosted to be 632 C g-1 and 0.73 C cm-2 at 1 mA cm-2, about 2 and 2.7 times larger than those of Ni2P@CC (321 C g-1 and 0.27 C cm-2), respectively; the rate capability is improved to be 63.3% from 1 to 10 mA cm-2, about 1.5 times larger than Ni2P@CC (42.9%); the cycle stability is enhanced to be 81.4% after 1000 cycles, about 1.6 times larger than Ni2P/CC (51.8%). The assembly Ni2P@Ni(OH)2@CC//AC hybrid supercapacitor device shows high energy density of 23.5 Wh kg-1 at a power density of 1158.0 W kg-1 and good cycling stability of 75.2% maintenance after 5000 cycles. Benefiting from the combined advantages of high electronic conductivity and large specific capacitance of Ni2P, superior anion exchanging/intercalating capacity of Ni(OH)2, excellent flexibility of carbon cloth and special hierarchical architecture with large surface area, the Ni2P@Ni(OH)2@CC electrode is promised to be a good candidate for supercapacitors.

scholarly journals Flexible Supercapacitor Electrodes Based on Carbon Cloth-Supported LaMnO3/MnO Nano-Arrays by One-Step Electrodeposition

Nanomaterials ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 1676 ◽  
Author(s):  
Pianpian Ma ◽  
Na Lei ◽  
Bo Yu ◽  
Yongkun Liu ◽  
Guohua Jiang ◽  
...  
Keyword(s):  
Specific Capacitance ◽  
High Energy ◽  
High Energy Density ◽  
Carbon Cloth ◽  
Supercapacitor Electrode ◽  
Cooperative Effects ◽  
Flexible Supercapacitor ◽  
Symmetric Supercapacitor ◽  
One Step ◽  
New Type

La-based perovskite-type oxide is a new type of supercapacitor electrode material with great potential. In the present study, LaMnO3/MnO (LMO/MnO) nano-arrays supported by carbon cloth are prepared via a simple one-step electrodeposition as flexible supercapacitor electrodes. The structure, deposit morphology of LMO/MnO, and the corresponding electrochemical properties have been investigated in detail. Carbon cloth-supported LMO/MnO electrode exhibits a specific capacitance of 260 F·g−1 at a current density of 0.5 A·g−1 in 0.5 M Na2SO4 aqueous electrolyte solution. The cooperative effects of LMO and MnO, as well as the uniform nano-array morphology contribute to the good electrochemical performance. In addition, a symmetric supercapacitor with a wide voltage window of 2 V is fabricated, showing a high energy density of 28.15 Wh·kg−1 at a power density of 745 W·kg−1. The specific capacitance drops to 65% retention after the first 500 cycles due to the element leaching effect and partial flaking of LMO/MnO, yet remains stable until 5000 cycles. It is the first time that La-based perovskite has been exploited for flexible supercapacitor applications, and further optimization is expected.

scholarly journals Electrode Materials for Supercapacitors: A Review of Recent Advances

Catalysts ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 969
Author(s):  
Parnia Forouzandeh ◽  
Vignesh Kumaravel ◽  
Suresh C. Pillai
Keyword(s):  
Electrochemical Properties ◽  
Specific Capacitance ◽  
Electrode Materials ◽  
Electronic Device ◽  
High Energy ◽  
High Energy Density ◽  
Storage Mechanism ◽  
Hybrid Supercapacitors ◽  
Discharge Rates ◽  
Redox Active

The advanced electrochemical properties, such as high energy density, fast charge–discharge rates, excellent cyclic stability, and specific capacitance, make supercapacitor a fascinating electronic device. During recent decades, a significant amount of research has been dedicated to enhancing the electrochemical performance of the supercapacitors through the development of novel electrode materials. In addition to highlighting the charge storage mechanism of the three main categories of supercapacitors, including the electric double-layer capacitors (EDLCs), pseudocapacitors, and the hybrid supercapacitors, this review describes the insights of the recent electrode materials (including, carbon-based materials, metal oxide/hydroxide-based materials, and conducting polymer-based materials, 2D materials). The nanocomposites offer larger SSA, shorter ion/electron diffusion paths, thus improving the specific capacitance of supercapacitors (SCs). Besides, the incorporation of the redox-active small molecules and bio-derived functional groups displayed a significant effect on the electrochemical properties of electrode materials. These advanced properties provide a vast range of potential for the electrode materials to be utilized in different applications such as in wearable/portable/electronic devices such as all-solid-state supercapacitors, transparent/flexible supercapacitors, and asymmetric hybrid supercapacitors.

β-NiMoO4 nanowire arrays grown on carbon cloth for 3D solid asymmetry supercapacitors

RSC Advances ◽  
2015 ◽  
Vol 5 (129) ◽  
pp. 107098-107104 ◽  
Author(s):  
Chuanshen Wang ◽  
Yi Xi ◽  
Chenguo Hu ◽  
Shuge Dai ◽  
Mingjun Wang ◽  
...  
Keyword(s):  
Energy Density ◽  
Specific Capacitance ◽  
Power Density ◽  
High Energy ◽  
Nanowire Arrays ◽  
High Energy Density ◽  
Carbon Cloth ◽  
Maximum Power Density ◽  
Capacity Retention ◽  
3D Solid

A β-NiMoO4 NW supercapacitor lights one LED for 260 s and delivers a large specific capacitance (414.7 F g−1 at 0.25 A g−1), high energy density (36.86 W h kg−1), a maximum power density of 1100 W kg−1 and 65.96% capacity retention after 6000 cycles.

NiCo2S4 Nanosheet Arrays on Carbon Cloth for Asymmetric Supercapacitors

2020 ◽  
Vol 15 (2) ◽  
pp. 301-305
Author(s):  
Xiaojuan Li ◽  
Guangmeng Qu ◽  
Hongxia Bu ◽  
Xijin Xu
Keyword(s):  
Energy Density ◽  
Electrochemical Properties ◽  
Crystal Structures ◽  
Specific Capacitance ◽  
Positive Electrode ◽  
Carbon Cloth ◽  
Cycle Stability ◽  
Asymmetric Supercapacitors ◽  
Nanosheet Arrays

NiCo2S4 nanosheet arrays have been successfully grown on carbon cloth via an easy hydrothermal way, which were then used to assemble asymmetric supercapacitors. The microstructures, the crystal structures and the electrochemical properties were carefully studied, and the NiCo2S4 nanosheet arrays exhibited impressive specific capacitance (SC) of 184.2 mAh/g at 1 A/g. The asymmetric supercapacitors (ASCs) with NiCo2S4 nanosheets as positive electrode demonstrated the energy density of 55.6 Wh/kg at 1.6 kW/kg. Furthermore, good cycle stability (93.72% after 5000 cycles) can be also possessed.

scholarly journals Facile synthesis of Al-doped NiO nanosheet arrays for high-performance supercapacitors

2018 ◽  
Vol 5 (11) ◽  
pp. 180842 ◽  
Author(s):  
Jinping Chen ◽  
Xianyun Peng ◽  
Lida Song ◽  
Lihan Zhang ◽  
Xijun Liu ◽  
...  
Keyword(s):  
Specific Capacitance ◽  
High Performance ◽  
Rate Capability ◽  
Material Design ◽  
High Energy ◽  
High Rate ◽  
High Energy Density ◽  
Electrochemical Performances ◽  
Multiwalled Carbon ◽  
Nanosheet Arrays

Electrode material design is the key to the development of asymmetric supercapacitors with high electrochemical performances and stability. In this work, Al-doped NiO nanosheet arrays were synthesized using a facile hydrothermal method followed by a calcination process, and the synthesized arrays exhibited a superior pseudocapacitive performance, including a favourable specific capacitance of 2253 ± 105 F g −1 at a current density of 1 A g −1 , larger than that of an undoped NiO electrode (1538 ± 80 F g −1 ). More importantly, the arrays showed a high-rate capability (75% capacitance retention at 20 A g −1 ) and a high cycling stability (approx. 99% maintained after 5000 cycles). The above efficient capacitive performance benefits from the large electrochemically active area and enhanced conductivity of the arrays. Furthermore, an assembled asymmetric supercapacitor based on the Al-doped NiO arrays and N-doped multiwalled carbon nanotube ones delivered a high specific capacitance of 192 ± 23 F g −1 at 0.4 A g −1 with a high-energy density of 215 ± 15 Wh kg −1 and power density of 21.6 kW kg −1 . Additionally, the asymmetric device exhibited a durable cyclic stability (approx. 100% retention after 5000 cycles). This work with the proposed doping method will be beneficial to the construction of high-performance supercapacitor systems.

Potassium Pre-Inserted K1.04Mn8O16 Cathode Materials for Aqueous Li-Ion and Na-Ion Hybrid Capacitors

2019 ◽  
Author(s):  
Yamin Zhang ◽  
Lina Chen ◽  
Chongyang Hao ◽  
Xiaowen Zheng ◽  
Yixuan Guo ◽  
...  
Keyword(s):  
Cycling Performance ◽  
High Energy ◽  
High Energy Density ◽  
Potassium Ions ◽  
Tunnel Structure ◽  
Hybrid Supercapacitor ◽  
Hybrid Supercapacitors ◽  
Li Ion ◽  
Power Densities ◽  
Hybrid Capacitors

For the applications of aqueous Li-ion hybrid capacitors and Na-ion hybrid capacitors, potassium ions are pre-inserted into MnO<sub>2</sub> tunnel structure, the as-prepared K<sub>1.04</sub>Mn<sub>8</sub>O<sub>16</sub> materials consist of <a>nanoparticles</a> and nanorods were prepared by facile high-temperature solid-state reaction. <a></a>The as-prepared materials were well studied andthey show outstanding electrochemical behavior. We assembled hybrid supercapacitors with commercial activated carbon (YEC-8A) as anode and K<sub>1.04</sub>Mn<sub>8</sub>O<sub>16 </sub>as cathode. It has high energy densities and power densities. Li-ion capacitors reach a high energy density of 127.61 Wh kg<sup>-1 </sup>at the power density of 99.86 W kg<sup>-1</sup> and Na-ion capacitor obtains 170.96 Wh kg<sup>-1 </sup>at 133.79 W kg<sup>-1</sup>. In addition, the <a>hybrid supercapacitor</a>s demonstrate excellent cycling performance which maintain 97 % capacitance retention for Li-ion capacitor and 85 % for Na-ion capacitor after 10,000 cycles.

High energy density aqueous zinc–benzoquinone batteries enabled by carbon cloth with multiple anchoring effects

2021 ◽  
Author(s):  
Zhiqiang Luo ◽  
Silin Zheng ◽  
Shuo Zhao ◽  
Xin Jiao ◽  
Zongshuai Gong ◽  
...  
Keyword(s):  
Energy Storage ◽  
Energy Density ◽  
Porous Carbon ◽  
Large Scale ◽  
High Energy ◽  
High Energy Density ◽  
Carbon Cloth ◽  
Anchoring Effects ◽  
High Theoretical Capacity ◽  
Energy Storage Applications

Benzoquinone with high theoretical capacity is anchored on N-plasma engraved porous carbon as a desirable cathode for rechargeable aqueous Zn-ion batteries. Such batteries display tremendous potential in large-scale energy storage applications.

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