scholarly journals Electrodeposited Porous Mn1.5Co1.5O4/Ni Composite Electrodes for High-Voltage Asymmetric Supercapacitors

Materials ◽  
2017 ◽  
Vol 10 (4) ◽  
pp. 370 ◽  
Author(s):  
Guan-Ting Pan ◽  
Siewhui Chong ◽  
Thomas Yang ◽  
Chao-Ming Huang
Keyword(s):  
High Voltage ◽  
Composite Electrodes ◽  
Asymmetric Supercapacitors

Graphene-based materials for high-voltage and high-energy asymmetric supercapacitors

2017 ◽  
Vol 6 ◽  
pp. 70-97 ◽  
Author(s):  
Shuanghao Zheng ◽  
Zhong-Shuai Wu ◽  
Sen Wang ◽  
Han Xiao ◽  
Feng Zhou ◽  
...  
Keyword(s):  
High Voltage ◽  
High Energy ◽  
Asymmetric Supercapacitors

High-voltage asymmetric supercapacitors operating in aqueous electrolyte

2005 ◽  
Vol 82 (4) ◽  
pp. 567-573 ◽  
Author(s):  
V. Khomenko ◽  
E. Raymundo-Piñero ◽  
E. Frackowiak ◽  
F. Béguin
Keyword(s):  
High Voltage ◽  
Aqueous Electrolyte ◽  
Asymmetric Supercapacitors

Nanoscale chemical imaging of the additive effects on the interfaces of high-voltage LiCoO2 composite electrodes

2017 ◽  
Vol 53 (61) ◽  
pp. 8581-8584 ◽  
Author(s):  
Jian Wang ◽  
Yajuan Ji ◽  
Narayana Appathurai ◽  
Jigang Zhou ◽  
Yong Yang
Keyword(s):  
Electron Microscopy ◽  
High Voltage ◽  
Chemical Imaging ◽  
Additive Effects ◽  
Composite Electrodes ◽  
Photoemission Electron Microscopy ◽  
X Ray ◽  
Multiple Components ◽  
Nanoscale Chemical Imaging ◽  
Photoemission Electron

X-ray photoemission electron microscopy (X-PEEM) of cycled LiCoO2 composite electrodes has revealed the interfaces of various components within the composite electrodes and their dependence on additives in the electrolyte and the interplay of multiple components in the electrodes.

Asymmetric supercapacitors based on carbon nanofibre and polypyrrole/nanocellulose composite electrodes

RSC Advances ◽  
2015 ◽  
Vol 5 (21) ◽  
pp. 16405-16413 ◽  
Author(s):  
Petter Tammela ◽  
Zhaohui Wang ◽  
Sara Frykstrand ◽  
Peng Zhang ◽  
Ida-Maria Sintorn ◽  
...  
Keyword(s):  
Current Density ◽  
Aqueous Electrolyte ◽  
Cell Voltage ◽  
Composite Electrodes ◽  
Asymmetric Supercapacitors ◽  
Carbon Nanofibre ◽  
Maximum Cell ◽  
A Current

Asymmetric, all-organic supercapacitors (containing an aqueous electrolyte), exhibiting a capacitance of 25 F g−1 (or 2.3 F cm−2) at a current density of 20 mA cm−2 and a maximum cell voltage of 1.6 V, are presented.

NiCo2S4 nanosheets decorated on nitrogen-doped hollow carbon nanospheres as advanced electrodes for high-performance asymmetric supercapacitors

2021 ◽  
Author(s):  
Bei Li ◽  
Ling Xie ◽  
Yanping Liu ◽  
Dongrui Yao ◽  
Lei Yao ◽  
...  
Keyword(s):  
High Performance ◽  
Cycling Stability ◽  
Composite Electrodes ◽  
Carbon Nanospheres ◽  
Asymmetric Supercapacitors ◽  
Transport Pathways ◽  
Nitrogen Doped ◽  
Confined Growth ◽  
Overall Performance ◽  
Hollow Carbon

Abstract Taking advantage of both Faradaic and carbonaceous materials is an efficient way to synthesize composite electrodes with enhanced performance for supercapacitors. In this study, NiCo2S4 nanoflakes were grown on the surface of nitrogen-doped hollow carbon nanospheres (NHCSs), forming a NiCo2S4/NHCS composite with a core-shell structure. This three-dimensionally confined growth of NiCo2S4 can effectively inhibit its aggregation and facilitate mass transport and charge transfer. Accordingly, the NiCo2S4/NHCS composite exhibited high cycling stability with only 9.2% capacitance fading after 10,000 cycles, outstanding specific capacitance of 902 F g−1 at 1 A g−1, and it retained 90.6% of the capacitance at 20 A g−1. Moreover, an asymmetric supercapacitor composed of NiCo2S4/NHCS and activated carbon electrodes delivered remarkable energy density (31.25 Wh kg−1 at 750 W kg−1), excellent power density (15003 W kg−1 at 21.88 Wh kg−1), and satisfactory cycling stability (13.4% capacitance fading after 5000 cycles). The outstanding overall performance is attributed to the synergistic effect of the NiCo2S4 shell and NHSC core, which endows the composite with a stable structure, high electrical conductivity, abundant active reaction sites, and short ion-transport pathways. The synthesized NiCo2S4/NHCS composite is a competitive candidate for the electrodes of high-performance supercapacitors.

MnO2/thermally reduced graphene oxide composites for high-voltage asymmetric supercapacitors

2017 ◽  
Vol 240 ◽  
pp. 53-62 ◽  
Author(s):  
Ewa Miniach ◽  
Agata Śliwak ◽  
Adam Moyseowicz ◽  
Laura Fernández-Garcia ◽  
Zoraida González ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
High Voltage ◽  
Asymmetric Supercapacitors ◽  
Reduced Graphene ◽  
Oxide Composites

scholarly journals Sputtering TiO2 on LiCoO2 composite electrodes as a simple and effective coating to enhance high-voltage cathode performance

2017 ◽  
Vol 346 ◽  
pp. 24-30 ◽  
Author(s):  
Aijun Zhou ◽  
Yanting Lu ◽  
Qingji Wang ◽  
Jin Xu ◽  
Weihang Wang ◽  
...  
Keyword(s):  
High Voltage ◽  
Composite Electrodes
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