Heterostructures of Ni–Co–Al layered double hydroxide assembled on V4C3MXene for high-energy hybrid supercapacitors

2019 ◽  
Vol 7 (5) ◽  
pp. 2291-2300 ◽  
Author(s):  
Xin Wang ◽  
Hui Li ◽  
Han Li ◽  
Shuai Lin ◽  
Jin Bai ◽  
...  
Keyword(s):  
Layered Double Hydroxide ◽  
High Energy ◽  
Hybrid Supercapacitor ◽  
Synthetic Process ◽  
Hybrid Supercapacitors ◽  
Double Hydroxide

The synthetic process of the NiCoAl-LDH/V4C3Txcomposite and the assembled NiCoAl-LDH/V4C3Tx//AC hybrid supercapacitor device.

Potassium Pre-Inserted K1.04Mn8O16 Cathode Materials for Aqueous Li-Ion and Na-Ion Hybrid Capacitors

2019 ◽  
Author(s):  
Yamin Zhang ◽  
Lina Chen ◽  
Chongyang Hao ◽  
Xiaowen Zheng ◽  
Yixuan Guo ◽  
...  
Keyword(s):  
Cycling Performance ◽  
High Energy ◽  
High Energy Density ◽  
Potassium Ions ◽  
Tunnel Structure ◽  
Hybrid Supercapacitor ◽  
Hybrid Supercapacitors ◽  
Li Ion ◽  
Power Densities ◽  
Hybrid Capacitors

For the applications of aqueous Li-ion hybrid capacitors and Na-ion hybrid capacitors, potassium ions are pre-inserted into MnO<sub>2</sub> tunnel structure, the as-prepared K<sub>1.04</sub>Mn<sub>8</sub>O<sub>16</sub> materials consist of <a>nanoparticles</a> and nanorods were prepared by facile high-temperature solid-state reaction. <a></a>The as-prepared materials were well studied andthey show outstanding electrochemical behavior. We assembled hybrid supercapacitors with commercial activated carbon (YEC-8A) as anode and K<sub>1.04</sub>Mn<sub>8</sub>O<sub>16 </sub>as cathode. It has high energy densities and power densities. Li-ion capacitors reach a high energy density of 127.61 Wh kg<sup>-1 </sup>at the power density of 99.86 W kg<sup>-1</sup> and Na-ion capacitor obtains 170.96 Wh kg<sup>-1 </sup>at 133.79 W kg<sup>-1</sup>. In addition, the <a>hybrid supercapacitor</a>s demonstrate excellent cycling performance which maintain 97 % capacitance retention for Li-ion capacitor and 85 % for Na-ion capacitor after 10,000 cycles.

Sandwich-like NiCo layered double hydroxide/reduced graphene oxide nanocomposite cathodes for high energy density asymmetric supercapacitors

2019 ◽  
Vol 48 (16) ◽  
pp. 5193-5202 ◽  
Author(s):  
Kai Le ◽  
Zhou Wang ◽  
Fenglong Wang ◽  
Qi Wang ◽  
Qian Shao ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Energy Density ◽  
Reduced Graphene Oxide ◽  
Layered Double Hydroxide ◽  
High Energy ◽  
High Energy Density ◽  
Asymmetric Supercapacitors ◽  
Reduced Graphene ◽  
Excellent Cycling Stability ◽  
Double Hydroxide

Lab-synthesized sandwich-like LDH/rGO composites were assembled into asymmetric supercapacitors exhibiting high energy density and excellent cycling stability.

scholarly journals Synthesis, characterization, and properties of nickel–cobalt layered double hydroxide nanostructures

RSC Advances ◽  
2017 ◽  
Vol 7 (62) ◽  
pp. 38945-38950 ◽  
Author(s):  
Chunxian Xing ◽  
Farayi Musharavati ◽  
Hui Li ◽  
Erfan Zalezhad ◽  
Oscar K. S. Hui ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Spatial Structure ◽  
Layered Double Hydroxide ◽  
Electrode Materials ◽  
Electrochemical Activity ◽  
Metal Hydroxide ◽  
Hybrid Supercapacitors ◽  
Nickel Cobalt ◽  
Double Hydroxide

Ni–Co-LDH has recently been examined for its potential as battery-type hybrid supercapacitors made from metal hydroxide electrode materials, due to their unique spatial structure, excellent electrochemical activity, and good electrical conductivity.

A high energy density asymmetric supercapacitor based on a CoNi-layered double hydroxide and activated carbon

Carbon ◽  
2016 ◽  
Vol 100 ◽  
pp. 710 ◽  
Author(s):  
Li-jing Xie ◽  
Guo-hua Sun ◽  
Long-fei Xie ◽  
Fang-yuan Su ◽  
Xiao-ming Li ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Energy Density ◽  
Layered Double Hydroxide ◽  
High Energy ◽  
High Energy Density ◽  
Asymmetric Supercapacitor ◽  
Double Hydroxide

Wearable Fabrics with Self-Branched Bimetallic Layered Double Hydroxide Coaxial Nanostructures for Hybrid Supercapacitors

ACS Nano ◽  
2017 ◽  
Vol 11 (11) ◽  
pp. 10860-10874 ◽  
Author(s):  
Goli Nagaraju ◽  
S. Chandra Sekhar ◽  
L. Krishna Bharat ◽  
Jae Su Yu
Keyword(s):  
Layered Double Hydroxide ◽  
Hybrid Supercapacitors ◽  
Double Hydroxide
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