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.

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.

Hydrothermal synthesis of MoS2 and WS2 nanoparticles for high-performance supercapacitor applications

2018 ◽  
Vol 42 (15) ◽  
pp. 12357-12360 ◽  
Author(s):  
Chandu Nagaraju ◽  
Chandu V. V. Muralee Gopi ◽  
Jin-Woo Ahn ◽  
Hee-Je Kim
Keyword(s):  
Hydrothermal Synthesis ◽  
Specific Capacitance ◽  
High Performance ◽  
Rate Capability ◽  
High Specific Capacitance ◽  
Cycling Stability ◽  
Good Cycling Stability ◽  
Supercapacitor Applications

As-fabricated nanoparticle structured MoS2 and WS2 electrodes delivered high specific capacitance, excellent rate capability and good cycling stability.

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.

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.

SiO2@NiO core–shell nanocomposites as high performance anode materials for lithium-ion batteries

RSC Advances ◽  
2015 ◽  
Vol 5 (77) ◽  
pp. 63012-63016 ◽  
Author(s):  
Yourong Wang ◽  
Wei Zhou ◽  
Liping Zhang ◽  
Guangsen Song ◽  
Siqing Cheng
Keyword(s):  
Lithium Ion Batteries ◽  
Anode Materials ◽  
High Performance ◽  
Coulombic Efficiency ◽  
Rate Capability ◽  
Lithium Ion ◽  
Cycling Stability ◽  
Core Shell ◽  
Excellent Cycling Stability

A SiO2@NiO core–shell electrode exhibits almost 100% coulombic efficiency, excellent cycling stability and rate capability after the first few cycles.

Building sponge-like robust architectures of CNT–graphene–Si composites with enhanced rate and cycling performance for lithium-ion batteries

2015 ◽  
Vol 3 (7) ◽  
pp. 3962-3967 ◽  
Author(s):  
Xiaolei Wang ◽  
Ge Li ◽  
Fathy M. Hassan ◽  
Matthew Li ◽  
Kun Feng ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Anode Materials ◽  
High Performance ◽  
Rate Capability ◽  
Lithium Ion ◽  
Cycling Performance ◽  
Cycling Stability ◽  
Great Promise ◽  
Practical Applications ◽  
Excellent Cycling Stability

High-performance robust CNT–graphene–Si composites are designed as anode materials with enhanced rate capability and excellent cycling stability for lithium-ion batteries. Such an improvement is mainly attributed to the robust sponge-like architecture, which holds great promise in future practical applications.

scholarly journals Dissected carbon nanotubes functionalized by 1-hydroxyanthraquinone for high-performance asymmetric supercapacitors

RSC Advances ◽  
2017 ◽  
Vol 7 (76) ◽  
pp. 48341-48353 ◽  
Author(s):  
Xia Yang ◽  
Yuying Yang ◽  
Quancai Zhang ◽  
Xiaotong Wang ◽  
Yufeng An ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Graphene Oxide ◽  
Specific Capacitance ◽  
Reduced Graphene Oxide ◽  
High Performance ◽  
Rate Capability ◽  
High Specific Capacitance ◽  
Covalent Modification ◽  
Asymmetric Supercapacitors ◽  
Reduced Graphene

1-Hydroxyanthraquinone (HAQ) is selected to functionalize the dissected carbon nanotubes (rDCNTs) with reduced graphene oxide layers through non-covalent modification. The composite achieves high specific capacitance and ultrahigh rate capability.

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.

scholarly journals Hierarchical Porous Carbon Derived from Sichuan Pepper for High-Performance Symmetric Supercapacitor with Decent Rate Capability and Cycling Stability

Nanomaterials ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 553 ◽  
Author(s):  
Hengshuo Zhang ◽  
Wei Xiao ◽  
Wenjie Zhou ◽  
Shanyong Chen ◽  
Yanhua Zhang
Keyword(s):  
Specific Capacitance ◽  
Current Density ◽  
High Performance ◽  
High Current Density ◽  
Rate Capability ◽  
Cycling Stability ◽  
Koh Activation ◽  
High Current ◽  
Symmetric Supercapacitor ◽  
Hierarchical Porous

Hierarchical micro-mesoporous carbon (denoted as HPC-2 in this study) was synthesized by pre-carbonization of biomass Sichuan pepper followed by KOH activation. It possessed well-developed porosity with the specific surface area of 1823.1 m2 g−1 and pore volume of 0.906 cm3 g−1, and exhibited impressive supercapacitive behaviors. For example, the largest specific capacitance of HPC-2 was tested to be ca. 171 F g−1 in a three-electrode setup with outstanding rate capability and stable electrochemical property, whose capacitance retention was near 100% after cycling at rather a high current density of 40 A g−1 for up to 10,000 cycles. Furthermore, a two-electrode symmetric supercapacitor cell of HPC-2//HPC-2 was constructed, which delivered the maximum specific capacitance and energy density of ca. 30 F g−1 and 4.2 Wh kg−1, respectively, had prominent rate performance and cycling stability with negligible capacitance decay after repetitive charge/discharge at a high current density of 10 A g−1 for over 10,000 cycles. Such electrochemical properties of HPC-2 in both three- and two-electrode systems are superior or comparable to those of a great number of porous biomass carbon reported previously, hence making it a promising candidate for the development of high-performance energy storage devices.

scholarly journals High-performance Bi2O3-NC anodes through constructing carbon shells and oxygen vacancies for flexible battery-supercapacitor hybrid devices

2021 ◽  
Author(s):  
Chao Yang ◽  
Qi Jia ◽  
Qianqian Pan ◽  
Wentao Qi ◽  
Rui Ling ◽  
...  
Keyword(s):  
High Performance ◽  
Oxygen Vacancies ◽  
Specific Capacity ◽  
Rate Capability ◽  
Cycling Stability ◽  
Hybrid Device ◽  
Efficient Strategy ◽  
Flexible Battery ◽  
Hybrid Devices

A facile and efficient strategy of constructing carbon shells and oxygen vacancies is proposed, in order to improve specific capacity, rate capability and cycling stability of the Bi2O3 anode for the battery–supercapacitor hybrid device.

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