Highly ordered mesoporous NiCo2O4with superior pseudocapacitance performance for supercapacitors

2015 ◽  
Vol 3 (21) ◽  
pp. 11503-11510 ◽  
Author(s):  
Lei An ◽  
Qilong Ren ◽  
Wenyao Li ◽  
Kaibing Xu ◽  
Yunjiu Cao ◽  
...  
Keyword(s):  
Specific Capacitance ◽  
Electrode Material ◽  
High Specific Capacitance ◽  
Cycling Stability ◽  
Electrochemical Performances ◽  
Ordered Mesoporous ◽  
Excellent Cycling Stability

Highly ordered mesoporous NiCo2O4electrode material exhibited superior electrochemical performances with high specific capacitance and excellent cycling stability.

Copolymer derived micro/meso-porous carbon nanofibers with vacancy-type defects for high-performance supercapacitors

2020 ◽  
Vol 8 (5) ◽  
pp. 2463-2471 ◽  
Author(s):  
Jiye Li ◽  
Weimiao Zhang ◽  
Xu Zhang ◽  
Liyao Huo ◽  
Jiayi Liang ◽  
...  
Keyword(s):  
Specific Capacitance ◽  
Carbon Nanofibers ◽  
Electrode Material ◽  
Porous Carbon ◽  
High Performance ◽  
High Specific Capacitance ◽  
Cycling Stability ◽  
Supercapacitor Electrode ◽  
Excellent Cycling Stability

Micro/meso-porous carbon nanofibers have been successfully prepared and directly adopted as a supercapacitor electrode material with high specific capacitance, area normalized capacitance and excellent cycling stability.

N-doped porous carbon derived from walnut shells with enhanced electrochemical performance for supercapacitor

2019 ◽  
Vol 12 (03) ◽  
pp. 1950042 ◽  
Author(s):  
Yunfeng Wang ◽  
Honghui Jiang ◽  
Shewen Ye ◽  
Jiaming Zhou ◽  
Jiahao Chen ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Specific Capacitance ◽  
Porous Carbon ◽  
Low Cost ◽  
High Specific Capacitance ◽  
Cycling Stability ◽  
Electrochemical Performances ◽  
Walnut Shells ◽  
Electrochemical Cycling ◽  
Elemental Doping

As the low-cost, natural multi-component for elemental doping and environment-friendly characteristics, biomass-derived porous carbon for energy storage attracts intense attention. Herein, walnut shells-based porous carbon has been obtained through carbonization, hydrothermal and activation treatment. The corresponding porous carbon owns superior electrochemical performances with specific capacitance reaching up to 462[Formula: see text]F[Formula: see text]g[Formula: see text] at 1[Formula: see text]A[Formula: see text]g[Formula: see text], and shows excellent cycling stability (5000 cycles, [Formula: see text]94.2% of capacitance retention at 10[Formula: see text]A[Formula: see text]g[Formula: see text]). Moreover, the symmetry supercapacitor achieves high specific capacitance (197[Formula: see text]F[Formula: see text]g[Formula: see text] at 1[Formula: see text]A[Formula: see text]g[Formula: see text]), relevant electrochemical cycling stability (5000 cycles, 89.2% of capacitance retention at 5[Formula: see text]A[Formula: see text]g[Formula: see text]) and high power/energy density (42.8[Formula: see text]W[Formula: see text]h[Formula: see text]kg[Formula: see text] at 1249[Formula: see text]W[Formula: see text]kg[Formula: see text]). Therefore, the facile synthesis approach and superb electrochemical performance ensure that the walnut shells-derived porous carbon is a promising electrode material candidate for supercapacitors.

Hierarchical CuCo2O4@NiMoO4 core–shell hybrid arrays as a battery-like electrode for supercapacitors

2017 ◽  
Vol 4 (9) ◽  
pp. 1575-1581 ◽  
Author(s):  
Jinghuang Lin ◽  
Haoyan Liang ◽  
Henan Jia ◽  
Shulin Chen ◽  
Yifei Cai ◽  
...  
Keyword(s):  
Specific Capacitance ◽  
Rate Capability ◽  
High Specific Capacitance ◽  
Cycling Stability ◽  
Core Shell ◽  
Excellent Cycling Stability ◽  
Good Rate Capability

Hierarchical CuCo2O4@NiMoO4 core–shell hybrid arrays exhibit a high specific capacitance, good rate capability and excellent cycling stability.

scholarly journals A Cr2O3/MWCNTs composite as a superior electrode material for supercapacitor

RSC Advances ◽  
2017 ◽  
Vol 7 (40) ◽  
pp. 25019-25024 ◽  
Author(s):  
Bingwei Chen ◽  
Yanfang Wang ◽  
Chunyang Li ◽  
Lijun Fu ◽  
Xiang Liu ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Specific Capacitance ◽  
Electrode Material ◽  
High Specific Capacitance ◽  
Cycling Stability ◽  
Practical Applications ◽  
Good Cycling Stability

A Cr2O3/MWCNTs composite exhibited high specific capacitance and good cycling stability a in 1 M KOH aqueous solution. This suggests that Cr2O3 can be promising for practical applications in supercapacitors.

Mechanism analysis of the capacitance contributions and ultralong cycling-stability of the isomorphous MnO2@MnO2 core/shell nanostructures for supercapacitors

2015 ◽  
Vol 3 (11) ◽  
pp. 6168-6176 ◽  
Author(s):  
Jiajia Shao ◽  
Xiying Zhou ◽  
Qian Liu ◽  
Rujia Zou ◽  
Wenyao Li ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Specific Capacitance ◽  
Hydrothermal Process ◽  
High Specific Capacitance ◽  
Cycling Stability ◽  
Core Shell ◽  
Mechanism Analysis ◽  
Shell Nanostructures ◽  
Excellent Cycling Stability ◽  
Facile Hydrothermal Process

The isomorphous MnO2@MnO2 core/shell nanostructures synthesized through a facile hydrothermal process showed remarkable electrochemical performance, i.e., a high specific capacitance with excellent cycling stability.

Yolk–shell-structured MnO2 microspheres with oxygen vacancies for high-performance supercapacitors

2018 ◽  
Vol 6 (4) ◽  
pp. 1601-1611 ◽  
Author(s):  
Yongsheng Fu ◽  
Xiangyu Gao ◽  
Daosong Zha ◽  
Junwu Zhu ◽  
Xiaoping Ouyang ◽  
...  
Keyword(s):  
Specific Capacitance ◽  
High Performance ◽  
Oxygen Vacancies ◽  
Rate Capability ◽  
High Specific Capacitance ◽  
Cycling Stability ◽  
Excellent Cycling Stability

An electrode consisting of yolk–shell-structured MnO2 microspheres with oxygen vacancies exhibits high specific capacitance, excellent cycling stability (10 000 cycles) and superior rate capability.

MnO2 Nanorods Embedded Reduced Graphene Oxide Nanocomposite with Ultrahigh Specific Capacitance and Excellent Cyclic Stability for High Performance Supercapacitors

2019 ◽  
Vol 07 (01n02) ◽  
pp. 1950005
Author(s):  
Muhammad Sajjad ◽  
Azhar Iqbal ◽  
Muhammad Ibrar Khan ◽  
Muhammad Tauseef Qureshi ◽  
Yaqoob Khan
Keyword(s):  
Specific Capacitance ◽  
Current Density ◽  
High Performance ◽  
Solution Process ◽  
High Specific Capacitance ◽  
Cost Effective ◽  
Cycling Stability ◽  
Reduced Graphene ◽  
Excellent Cycling Stability ◽  
Mg Content

Excellent cycling stability along with a high specific capacitance of the electrode material is the primary requirement for supercapacitor (SC) in recent years. Exceptionally simple and cost-effective solution process is employed for the first time to prepare [Formula: see text]-MnO2/rGO composites, in which KMnO4 content varies from (2[Formula: see text]mg, 4[Formula: see text]mg, 6[Formula: see text]mg and 8[Formula: see text]mg). The morphological analysis showed that [Formula: see text]-MnO2/rGO composites possess nanorod like morphology and were fully covered with rGO sheet. Among all composites, the sample with 6[Formula: see text]mg content of KMnO4 denoted as [Formula: see text]-MnO2/rGO composite (S–3) showed excellent supercapacitive performance with a specific capacitance of 720[Formula: see text]F/g at a current density of 4 A g[Formula: see text] with excellent cycling stability of 93% after 2000 cycles. Furthermore, these nanocomposites showed excellent supercapacitive properties with specific capacitances of 720–498 F/g at the current density of 4 A g[Formula: see text] with cycling stabilities of 71%, 68% and 60%, respectively.

MnMoO4·4H2O nanoplates grown on a Ni foam substrate for excellent electrochemical properties

2014 ◽  
Vol 2 (48) ◽  
pp. 20723-20728 ◽  
Author(s):  
Yunjiu Cao ◽  
Wenyao Li ◽  
Kaibing Xu ◽  
Yuxin Zhang ◽  
Tao Ji ◽  
...  
Keyword(s):  
Electrochemical Properties ◽  
Specific Capacitance ◽  
High Performance ◽  
High Specific Capacitance ◽  
Cycling Stability ◽  
Electrochemical Performances ◽  
Ni Foam ◽  
Hydrothermal Route ◽  
Facile Hydrothermal Route ◽  
Good Cycling Stability

MnMoO4·4H2O nanoplates were grown directly on a Ni foam by a facile hydrothermal route with enhanced electrochemical performances, i.e., a high specific capacitance of 1.15 F cm−2 (2300 F g−1) at 4 mA cm−2 and a good cycling stability of 92% of the initial specific capacitance after 3000 cycles, which may be considered a prospective material for high-performance electrochemical capacitors.

Melamine-assisted synthesis of porous V2O3/N-doped carbon hollow nanospheres for efficient sodium-ion storage

2021 ◽  
Vol 50 (11) ◽  
pp. 3867-3873
Author(s):  
Jiaxin Yao ◽  
Heng Zhang ◽  
Zejun Zhao ◽  
Zhixiao Zhu ◽  
Jialing Yao ◽  
...  
Keyword(s):  
Specific Capacitance ◽  
Hydrothermal Reaction ◽  
High Specific Capacitance ◽  
Cycling Stability ◽  
Sodium Ion ◽  
Hollow Nanospheres ◽  
Ion Storage ◽  
Carbon Coated ◽  
Excellent Cycling Stability ◽  
Sodium Ion Storage

V2O3/NC hollow nanospheres were synthesized by hydrothermal reaction and carbonization treatment. Under the effects of hollow architecture and carbon-coated structure, V2O3/NC HSs exhibited high specific capacitance and excellent cycling stability.

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