In situ encapsulation of Co3O4 polyhedra in graphene sheets for high-capacitance supercapacitors

2019 ◽  
Vol 48 (17) ◽  
pp. 5773-5778 ◽  
Author(s):  
Guanyu Lin ◽  
Yulin Jiang ◽  
Chengen He ◽  
Zhiyong Huang ◽  
Xiaofang Zhang ◽  
...  
Keyword(s):  
Energy Density ◽  
High Energy ◽  
Cycling Stability ◽  
High Energy Density ◽  
Graphene Sheets ◽  
Conductive Network ◽  
High Capacitance ◽  
Excellent Cycling Stability ◽  
Large Capacitance

The graphene encapsulated Co3O4 polyhedra (rGO/Co3O4) exhibited large capacitance, high energy density, and excellent cycling stability, due to the 3D double conductive network from graphene sheets and porous channels of Co3O4 polyhedra/N-doped carbon hybrid.

Co-Electrodeposited porous PEDOT–CNT microelectrodes for integrated micro-supercapacitors with high energy density, high rate capability, and long cycling life

Nanoscale ◽  
2019 ◽  
Vol 11 (16) ◽  
pp. 7761-7770 ◽  
Author(s):  
Muhammad Tahir ◽  
Liang He ◽  
Waqas Ali Haider ◽  
Wei Yang ◽  
Xufeng Hong ◽  
...  
Keyword(s):  
Energy Density ◽  
Rate Capability ◽  
High Energy ◽  
Cycling Stability ◽  
High Rate ◽  
High Energy Density ◽  
High Rate Capability ◽  
Excellent Cycling Stability ◽  
Cycling Life

Microstructuring of the PEDOT–CNT composite for microsupercapacitors with high rate capability and excellent cycling stability.

Modified chalcogens with a tuned nano-architecture for high energy density and long life hybrid super capacitors

2017 ◽  
Vol 5 (16) ◽  
pp. 7523-7532 ◽  
Author(s):  
Salah Abureden ◽  
Fathy M. Hassan ◽  
Gregory Lui ◽  
Serubbabel Sy ◽  
Rasim Batmaz ◽  
...  
Keyword(s):  
Energy Density ◽  
High Energy ◽  
High Energy Density ◽  
Graphene Sheets ◽  
Solvothermal Technique ◽  
Long Life ◽  
Super Capacitors

A novel in situ vanadium-modified NiCo2S4 wrapped with graphene sheets was synthesized using a simple solvothermal technique.

A flexible hybrid capacitor based NiCo2S4 nanowire electrode with an ultrahigh capacitance

2021 ◽  
Author(s):  
Tong Xia ◽  
Ying Liu ◽  
Meizhen Dai ◽  
Qing Xia ◽  
Xiang Wu
Keyword(s):  
Energy Density ◽  
Electrode Materials ◽  
High Energy ◽  
Cycling Stability ◽  
High Energy Density ◽  
Actual Performance ◽  
Excellent Cycling Stability

It is well known that the excellent cycling stability and high energy density of electrode materials is very important for supercapacitor. However, their actual performance far falls behind and does...

Chemically presodiated Sb with a fluoride-rich interphase as a cycle-stable anode for high-energy sodium ion batteries

2021 ◽  
Author(s):  
Mengchuang Liu ◽  
Zezhou Yang ◽  
Yifei Shen ◽  
Shuhan Guo ◽  
Junyao Zhang ◽  
...  
Keyword(s):  
Energy Density ◽  
High Energy ◽  
Cycling Stability ◽  
Sodium Ion ◽  
High Energy Density ◽  
Sodium Ion Batteries ◽  
Excellent Cycling Stability

A controllable and effective presodiation strategy was reported to eliminate the large irreversible Na loss of Sb anodes, thus enabling a Na-ion full battery with high energy density and excellent cycling stability.

scholarly journals Formation of nickel–cobalt sulphide@graphene composites with enhanced electrochemical capacitive properties

RSC Advances ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 6946-6955 ◽  
Author(s):  
Junjie Qiu ◽  
Zhongxiong Bai ◽  
Shucheng Liu ◽  
Yi Liu
Keyword(s):  
Energy Density ◽  
High Energy ◽  
Cycling Stability ◽  
High Energy Density ◽  
Nickel Cobalt ◽  
Cobalt Sulphide ◽  
Capacitive Properties ◽  
Excellent Cycling Stability

Ni–Co–S@graphene composites, derived from a metallocene/MOF precursor, presents high energy density and excellent cycling stability.

scholarly journals Na0.76V6O15/Activated Carbon Hybrid Cathode for High-Performance Lithium-Ion Capacitors

Materials ◽  
2020 ◽  
Vol 14 (1) ◽  
pp. 122
Author(s):  
Renwei Lu ◽  
Xiaolong Ren ◽  
Chong Wang ◽  
Changzhen Zhan ◽  
Ding Nan ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Energy Density ◽  
Power Density ◽  
Cathode Materials ◽  
Low Cost ◽  
Lithium Ion ◽  
High Energy ◽  
Cycling Stability ◽  
High Energy Density ◽  
Artificial Graphite

Lithium-ion hybrid capacitors (LICs) are regarded as one of the most promising next generation energy storage devices. Commercial activated carbon materials with low cost and excellent cycling stability are widely used as cathode materials for LICs, however, their low energy density remains a significant challenge for the practical applications of LICs. Herein, Na0.76V6O15 nanobelts (NaVO) were prepared and combined with commercial activated carbon YP50D to form hybrid cathode materials. Credit to the synergism of its capacitive effect and diffusion-controlled faradaic effect, NaVO/C hybrid cathode displays both superior cyclability and enhanced capacity. LICs were assembled with the as-prepared NaVO/C hybrid cathode and artificial graphite anode which was pre-lithiated. Furthermore, 10-NaVO/C//AG LIC delivers a high energy density of 118.9 Wh kg−1 at a power density of 220.6 W kg−1 and retains 43.7 Wh kg−1 even at a high power density of 21,793.0 W kg−1. The LIC can also maintain long-term cycling stability with capacitance retention of approximately 70% after 5000 cycles at 1 A g−1. Accordingly, hybrid cathodes composed of commercial activated carbon and a small amount of high energy battery-type materials are expected to be a candidate for low-cost advanced LICs with both high energy density and power density.

Utilizing in situ alloying reaction to achieve the self-healing, high energy density and cost-effective Li||Sb liquid metal battery

2021 ◽  
Vol 514 ◽  
pp. 230578
Author(s):  
Shuai Yan ◽  
Xianbo Zhou ◽  
Haomiao Li ◽  
Yi Shen ◽  
Yaling He ◽  
...  
Keyword(s):  
Energy Density ◽  
Liquid Metal ◽  
Cost Effective ◽  
High Energy ◽  
The Self ◽  
High Energy Density ◽  
Self Healing ◽  
Liquid Metal Battery
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