Enhanced electrochemical performances of ZnCo2O4@CoMoO4 core–shell structures with long cycling stabilities

2020 ◽  
Vol 49 (19) ◽  
pp. 6242-6248
Author(s):  
Meizhen Dai ◽  
Xinxu Jia ◽  
Hengqi Liu ◽  
Yongli Tong ◽  
Depeng Zhao ◽  
...  
Keyword(s):  
Energy Storage ◽  
Specific Capacitance ◽  
Electrode Materials ◽  
High Specific Capacitance ◽  
Shell Structures ◽  
Core Shell ◽  
Electrochemical Performances ◽  
Energy Shortage ◽  
Excellent Stability

Developing electrode materials with high specific capacitance and excellent stability for energy storage is necessary to solve energy shortage issues.

Hierarchical core/shell structures of ZnO nanorod@CoMoO4 nanoplates used as a high-performance electrode for supercapacitors

RSC Advances ◽  
2016 ◽  
Vol 6 (4) ◽  
pp. 3020-3024 ◽  
Author(s):  
Yunjiu Cao ◽  
Lei An ◽  
Lijun Liao ◽  
Xijian Liu ◽  
Tao Ji ◽  
...  
Keyword(s):  
Specific Capacitance ◽  
High Performance ◽  
High Specific Capacitance ◽  
Cycling Stability ◽  
Shell Structures ◽  
Core Shell ◽  
Zno Nanorod ◽  
Good Cycling Stability

ZnO@CoMoO4 core/shell structures as an electrode for supercapacitors exhibited a high specific capacitance of 1.52 F cm−2 (1169 F g−1) at 2 mA cm−2 and a good cycling stability of 109% of the initial specific capacitance after 5000 cycles.

Emerging NiCo2O4 Electrode Materials Assembled by Nanosheets for High Performance Hybrid Capacitor with High Specific Capacitance

2020 ◽  
Vol 15 (4) ◽  
pp. 498-503
Author(s):  
Jian Wang ◽  
Yan Zhao ◽  
Dong Zhang ◽  
Yucai Li ◽  
Shiwei Song ◽  
...  
Keyword(s):  
Energy Storage ◽  
Specific Capacitance ◽  
Power Density ◽  
Rational Design ◽  
Electrode Materials ◽  
High Specific Capacitance ◽  
High Energy ◽  
High Energy Density ◽  
Storage Device ◽  
Energy Storage Devices

Rational design and construction of hybrid capacitor electrode materials with prominent energy and power density plays an indispensable role for its potential application in energy storage devices. In this work, the nanoflower-like NiCo2O4 samples are successfully prepared on Ni foam via a facile hydrothermal method. The as-fabricated NiCo2O4 samples exhibit superior electrochemical performance with a high specific capacitance of 444.4 F g–1 at 1 A g–1 and excellent capacitance retention. In addition, the as-fabricated device presents a high energy density of 0.298 mWh cm–3 at a power density of 5.71 mW cm–3 and excellent cycle stability with the capacitance retention of 75.6% after 10000 cycles, indicating a promising application as electrodes for energy storage device.

scholarly journals An Overview on Ruthenium Oxide Composites – Challenging Material for Energy Storage Applications

2018 ◽  
Vol 15 (1) ◽  
pp. 30-40 ◽  
Author(s):  
Dipanwita Majumdar
Keyword(s):  
Energy Storage ◽  
Specific Capacitance ◽  
Activated Carbons ◽  
Active Material ◽  
Ruthenium Oxide ◽  
High Specific Capacitance ◽  
Electrochemical Performances ◽  
Storage Devices ◽  
Ruthenium Oxides ◽  
Energy Storage Applications

Ruthenium oxides owing to their high specific capacitance have been widely identified as promising materials for electrochemical charge storage devices. However, high priced ruthenium precursors restrict their commercial usage. Accordingly, numerous explorations investigated the influences on capacitive behavior of ruthenium oxide on blending with varied materials like other metal oxides, activated carbons, conducting polymers, CNTs and functionalized graphene systems as composites. The aim had been to optimize the material cost without compromising with but improving the composite electrochemical performances. The scientific explorations reveal that the overall specific capacitance of composites is a strongly related to the ruthenium oxide (RuO2) present in the system since it is the main electro-active material providing the Faradaic pseudocapacitances besides the electrical double layer contributions from the base carbon component of the composite. Major progress in the theoretical and practical research and development in this particular field has enviced a large number of research articles and technical reports in the recent past. The current investigations focus on utilizing minimum amount of metal in the composite; upholding the synergistic effect from the metal oxide and the support (carbon materials generally) to obtain better electrochemical signatures. Optimization of important factors leading to reduced nanostructure agglomeration, minimum electrostatic resistance and ultrafast proton/electrons diffusion through the hollow porous structures may ultimately result to the theoretically expected specific capacitance. Nonetheless, to the best of knowledge of the author, there is no systematic review available pertaining to recent advancement of the composites of RuO2. Thus, this overview categorically narrates recent progresses on the fabrication, performances and achievements of ruthenium oxide composite as electrode material in energy storage applications which will be beneficial especially to the newcomers in this field of research.

Core–shell structural PANI-derived carbon@Co–Ni LDH electrode for high-performance asymmetric supercapacitors

2018 ◽  
Vol 2 (6) ◽  
pp. 1350-1355 ◽  
Author(s):  
Junming Cao ◽  
La Li ◽  
Yunlong Xi ◽  
Junzhi Li ◽  
Xuexue Pan ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Specific Capacitance ◽  
Double Layer ◽  
High Performance ◽  
Electrode Materials ◽  
High Specific Capacitance ◽  
Core Shell ◽  
Asymmetric Supercapacitors ◽  
Double Layer Capacitor ◽  
Metal Nanocomposites

Carbon/metal nanocomposites have been considered promising electrode materials for application in supercapacitors owing to their combination of good electrical conductivity, excellent cycle stabilities of the electronic double layer capacitor (EDLC) and high specific capacitance of the pseudocapacitor.

Poly(aniline-co-pyrrole)-coated Ni-doped manganese dioxide as electrode materials for supercapacitors

2020 ◽  
Vol 13 (02) ◽  
pp. 2051007
Author(s):  
Jie Dong ◽  
Qinghao Yang ◽  
Qiuli Zhao ◽  
Zhenzhong Hou ◽  
Yue Zhou ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Manganese Dioxide ◽  
Specific Capacitance ◽  
Electrode Materials ◽  
High Specific Capacitance ◽  
Cycle Stability ◽  
Mass Ratio ◽  
Scan Rate ◽  
Poly Aniline ◽  
Inorganic And Organic

Electrode materials with a high specific capacitance, outstanding reversibility and excellent cycle stability are constantly pursued for supercapacitors. In this paper, we present an approach to improve the electrochemical performance by combining the advantages of both inorganic and organic. Ni-MnO2/PANi-co-PPy composites are synthesized, with the copolymer of aniline/pyrrole being coated on the surface of Ni-doped manganese dioxide nanospheres. The inorganic–organic composite enables a substantial increase in its specific capacitance and cycle stability. When the mass ratio of Ni-MnO2 to aniline and pyrrole mixed monomer is 1:5, the composite delivers high specific capacitance of 445.49[Formula: see text]F/g at a scan rate of 2[Formula: see text]mV/s and excellent cycle stability of 61.65% retention after 5000 cycles. The results indicate that the Ni-MnO2/PANi-co-PPy composites are promising electrode materials for future supercapacitors application.

Rational design of flower-like Co–Zn LDH@Co(H2PO4)2 heterojunctions as advanced electrode materials for supercapacitors

2021 ◽  
Vol 50 (13) ◽  
pp. 4643-4650
Author(s):  
Miao He ◽  
Yi He ◽  
Xinyi Zhou ◽  
Qiang Hu ◽  
Shixiang Ding ◽  
...  
Keyword(s):  
Energy Storage ◽  
Specific Capacitance ◽  
Rational Design ◽  
Electrode Materials ◽  
Storage Capacity ◽  
Energy Storage Capacity

The device exhibits 95.3% retention in specific capacitance after 5000 cycles and possesses superior energy-storage capacity.

Hybrid nanostructured C-dot decorated Fe3O4electrode materials for superior electrochemical energy storage performance

2015 ◽  
Vol 44 (19) ◽  
pp. 9221-9229 ◽  
Author(s):  
K. Bhattacharya ◽  
P. Deb
Keyword(s):  
Quantum Dots ◽  
Energy Storage ◽  
Specific Capacitance ◽  
High Specific Capacitance ◽  
Carbon Quantum Dots ◽  
Electrochemical Energy Storage ◽  
The Novel ◽  
Hybrid Nanocomposite ◽  
Storage Performance ◽  
Electrochemical Energy

Here, the novel Fe3O4-C hybrid nanocomposite demonstrates high specific capacitance (S.C.) than the pristine Fe3O4nanospheres due to the presence of the highly conducting carbon quantum dots.

A novel synthesis of ultra thin graphene sheets for energy storage applications using malonic acid as a reducing agent

2014 ◽  
Vol 2 (47) ◽  
pp. 20345-20357 ◽  
Author(s):  
Anil Kumar ◽  
Mahima Khandelwal
Keyword(s):  
Energy Storage ◽  
Potential Energy ◽  
Specific Capacitance ◽  
Malonic Acid ◽  
High Specific Capacitance ◽  
Reducing Agent ◽  
Graphene Sheets ◽  
Novel Synthesis ◽  
Energy Storage Applications ◽  
Charge Discharge

Novel ultrathin graphene sheets (0.41 ± 0.03 nm) with increased sp2 character, high specific capacitance and charge–discharge capability have been synthesized and demonstrated to have potential energy storage applications.

Controllable synthesis of 3D hierarchical bismuth compounds with good electrochemical performance for advanced energy storage devices

RSC Advances ◽  
2015 ◽  
Vol 5 (64) ◽  
pp. 51773-51778 ◽  
Author(s):  
Jinfeng Sun ◽  
Jinqing Wang ◽  
Zhangpeng Li ◽  
Zhigang Yang ◽  
Shengrong Yang
Keyword(s):  
Energy Storage ◽  
Electrochemical Performance ◽  
Specific Capacitance ◽  
Rate Capability ◽  
High Specific Capacitance ◽  
Controllable Synthesis ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Bismuth Compounds

3D hierarchical bismuth (Bi)-based compounds with controllable sizes and morphologies exhibit high specific capacitance and superior rate capability.

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