Electrochemical conversion of Ni2(OH)2CO3 into Ni(OH)2 hierarchical nanostructures loaded on a carbon nanotube paper with high electrochemical energy storage performance

2015 ◽  
Vol 3 (5) ◽  
pp. 1875-1878 ◽  
Author(s):  
Hongyuan Chen ◽  
Yiran Kang ◽  
Feng Cai ◽  
Sha Zeng ◽  
Weiwei Li ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Energy Storage ◽  
Nanowire Arrays ◽  
Electrochemical Energy Storage ◽  
Hierarchical Nanostructures ◽  
High Capacitance ◽  
Electrochemical Conversion ◽  
Storage Performance ◽  
Electrochemical Energy

Amorphous Ni2(OH)2CO3 nanowire arrays on a CNT paper were electrochemically converted into a Ni(OH)2 nanosheet with high capacitance for supercapacitors.

scholarly journals Maximizing ion accessibility in MXene-knotted carbon nanotube composite electrodes for high-rate electrochemical energy storage

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Xiang Gao ◽  
Xuan Du ◽  
Tyler S. Mathis ◽  
Mengmeng Zhang ◽  
Xuehang Wang ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Energy Storage ◽  
Ion Transport ◽  
Low Temperatures ◽  
Electrochemical Energy Storage ◽  
Composite Electrodes ◽  
Rate Performance ◽  
Organic Electrolytes ◽  
High Capacitance ◽  
Electrochemical Energy

AbstractImproving the accessibility of ions in the electrodes of electrochemical energy storage devices is vital for charge storage and rate performance. In particular, the kinetics of ion transport in organic electrolytes is slow, especially at low operating temperatures. Herein, we report a new type of MXene-carbon nanotube (CNT) composite electrode that maximizes ion accessibility resulting in exceptional rate performance at low temperatures. The improved ion transport at low temperatures is made possible by breaking the conventional horizontal alignment of the two-dimensional layers of the MXene Ti3C2 by using specially designed knotted CNTs. The large, knot-like structures in the knotted CNTs prevent the usual restacking of the Ti3C2 flakes and create fast ion transport pathways. The MXene-knotted CNT composite electrodes achieve high capacitance (up to 130 F g−1 (276 F cm−3)) in organic electrolytes with high capacitance retention over a wide scan rate range of 10 mV s−1 to 10 V s−1. This study is also the first report utilizing MXene-based supercapacitors at low temperatures (down to −60 °C).

High-capacitance MnO2 nanoflakes on preformed C/TiO2 shell/core nanowire arrays for electrochemical energy storage

2014 ◽  
Vol 120 ◽  
pp. 416-422 ◽  
Author(s):  
SainanYang ◽  
Kui Cheng ◽  
Jichun Huang ◽  
Ke Ye ◽  
Yang Xu ◽  
...  
Keyword(s):  
Energy Storage ◽  
Nanowire Arrays ◽  
Electrochemical Energy Storage ◽  
High Capacitance ◽  
Tio2 Shell ◽  
Electrochemical Energy

Hybrid nanostructured C-dot decorated Fe3O4electrode materials for superior electrochemical energy storage performance

2015 ◽  
Vol 44 (19) ◽  
pp. 9221-9229 ◽  
Author(s):  
K. Bhattacharya ◽  
P. Deb
Keyword(s):  
Quantum Dots ◽  
Energy Storage ◽  
Specific Capacitance ◽  
High Specific Capacitance ◽  
Carbon Quantum Dots ◽  
Electrochemical Energy Storage ◽  
The Novel ◽  
Hybrid Nanocomposite ◽  
Storage Performance ◽  
Electrochemical Energy

Here, the novel Fe3O4-C hybrid nanocomposite demonstrates high specific capacitance (S.C.) than the pristine Fe3O4nanospheres due to the presence of the highly conducting carbon quantum dots.

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