Enhanced electrochemical performances of polypyrrole/carboxyl graphene/carbon nanotubes ternary composite for supercapacitors

2018 ◽  
Vol 290 ◽  
pp. 1-11 ◽  
Author(s):  
Haihan Zhou ◽  
Hua-Jin Zhai ◽  
Xiaomin Zhi
Keyword(s):  
Carbon Nanotubes ◽  
Electrochemical Performances ◽  
Ternary Composite

Study of Carbon Nanotubes for Lithium-Ion Batteries Application

2010 ◽  
Vol 72 ◽  
pp. 299-304
Author(s):  
Alberto Varzi ◽  
Corina Täubert ◽  
Margret Wohlfahrt-Mehrens ◽  
Martin Kreis ◽  
Walter Schütz
Keyword(s):  
Carbon Nanotubes ◽  
Active Material ◽  
Chemical Vapour ◽  
Rate Capability ◽  
Lithium Ion ◽  
Electrochemical Performances ◽  
Negative Electrodes ◽  
Multi Walled Carbon Nanotubes ◽  
Li Ion ◽  
Walled Carbon Nanotubes

The potential use of multi-walled carbon nanotubes (MWCNTs) produced by chemical vapour deposition (CVD) as a conductive agent for electrodes in Li-ion batteries has been investigated. LiNi0.33Co0.33Mn0.33O2 (NCM) has been chosen as active material for positive electrodes, and a nano-sized TiO2-rutile for the negative electrodes. The electrochemical performances of the electrodes were studied by galvanostatic techniques and especially the influence of the nanotubes on the rate capability and cycling stability has been evaluated. The addition of MWCNTs significantly enhanced the rate performances of both positive and negative electrodes and improved the capacity retention upon cycling. The obtained results demonstrated that the addition of MWCNTs in low amounts to the electrode composition enables an increase in both energy and power density of a Li-ion battery.

Electrochemical performances of cobalt oxide–carbon nanotubes electrodes via different methods as negative material for alkaline rechargeable batteries

RSC Advances ◽  
2015 ◽  
Vol 5 (90) ◽  
pp. 73410-73415 ◽  
Author(s):  
Yanan Xu ◽  
Yanyin Dong ◽  
Xiaofeng Wang ◽  
Yijing Wang ◽  
Lifang Jiao ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Cobalt Oxide ◽  
Rechargeable Batteries ◽  
Electrochemical Performances ◽  
Negative Materials ◽  
Negative Material ◽  
First Time

Co3O4/CNTs samples are synthesized via different methods and investigated as negative materials for alkaline rechargeable batteries for the first time.

Preparation and Characterization of Pt-SnO2 Deposited on Multi-Walled Carbon Nano-Tubes for Methanol Electro-Oxidation

2013 ◽  
Vol 815 ◽  
pp. 508-511
Author(s):  
Dan Zhang
Keyword(s):  
Carbon Nanotubes ◽  
Cyclic Voltammetry ◽  
Pt Nanoparticles ◽  
Electrochemical Performances ◽  
Tin Oxides ◽  
Carbon Nano Tubes ◽  
Electro Oxidation

In this research, a sequential sol-thermal route has been used to prepare the SnO2 nanocolloid, Pt nanoparticles were then deposited on the nanosupport to obtain the Pt-SnO2/MWCNTs. The electrochemical performances of the catalysts were characterized by cyclic voltammetry and chronoamperometry. The Pt (fcc) crystalline was proved to be form on the surface of carbon nanotubes. The Pt based catalyst modified by tin oxides exhibit a electro-chemical performance for methanol electro-oxidation.

Facile Synthesis of Cobalt Oxide Uniformly Coated on Multi-Wall Carbon Nanotubes for Supercapacitors

2011 ◽  
Vol 306-307 ◽  
pp. 1148-1152 ◽  
Author(s):  
Liang Yu Gong ◽  
Ling Hao Su
Keyword(s):  
Carbon Nanotubes ◽  
Cobalt Oxide ◽  
Solid Phase ◽  
Synthesis Method ◽  
Electrochemical Performances ◽  
Composite Electrodes ◽  
Phase Synthesis ◽  
Multi Wall Carbon Nanotubes ◽  
Electrochemical Tests ◽  
Transmission Electron

The composite electrodes of cobalt oxide and multi-wall carbon nanotubes (MWCNTs) are prepared by a simple low-temperature solid-phase synthesis method with the assistance of polyethylene glycol and their pseudocapacitive performances are investigated in alkaline solution by cyclic voltammetry and galvanostatic charge/discharge tests, respectively. Transmission electron microscope images show that cobalt oxide is uniformly coated on multi-wall carbon nanotubes and the homogeneous hybrid nanostructure are considered to be responsible for their preferable electrochemical performances. The electrochemical tests further reveal that the composite can deliver a maximum specific capacitance of 217 F/g with a biggest utilization of Co element when the content of MWCNTs increases to 50 wt.%.

FeSe2/carbon nanotube hybrid lithium-ion battery for harvesting energy from triboelectric nanogenerators

2019 ◽  
Vol 55 (73) ◽  
pp. 10960-10963 ◽  
Author(s):  
Yang Tian ◽  
Zhaoying Wang ◽  
Jiangming Fu ◽  
Kequan Xia ◽  
Jianguo Lu ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Lithium Ion Batteries ◽  
High Voltage ◽  
Voltage Pulse ◽  
High Stability ◽  
Lithium Ion ◽  
High Voltage Pulse ◽  
Electrochemical Performances ◽  
Triboelectric Nanogenerators

FeSe2–carbon nanotubes hybrid lithium ion batteries, exhibiting excellent electrochemical performances, could withstand the high-voltage pulse to directly harvest electricity from triboelectric nanogenerators with high stability.

scholarly journals Preparation and Characterisation of LiFePO4/CNT Material for Li-Ion Batteries

2011 ◽  
Vol 2011 ◽  
pp. 1-5 ◽  
Author(s):  
Rushanah Mohamed ◽  
Shan Ji ◽  
Vladimir Linkov
Keyword(s):  
Carbon Nanotubes ◽  
Discharge Capacity ◽  
Cathode Materials ◽  
High Efficiency ◽  
Discharge Rate ◽  
Composite Cathode ◽  
Electrochemical Performances ◽  
Li Ion Batteries ◽  
Li Ion ◽  
Cycle Efficiency

Li-ion battery cathode materials were synthesised via a mechanical activation and thermal treatment process and systematically studied. LiFePO4/CNT composite cathode materials were successfully prepared from LiFePO4material. The synthesis technique involved growth of carbon nanotubes onto the LiFePO4using a novel spray pyrolysis-modified CVD technique. The technique yielded LiFePO4/CNT composite cathode material displaying good electrochemical activity. The composite cathode exhibited excellent electrochemical performances with 163 mAh/g discharge capacity with 94% cycle efficiency at a 0.1 C discharge rate in the first cycle, with a capacity fade of approximately 10% after 30 cycles. The results indicate that carbon nanotube addition can enable LiFePO4to display a higher discharge capacity at a fast rate with high efficiency. The research is of potential interest for the application of carbon nanotubes as a new conducting additive in cathode preparation and for the development of high-power Li-ion batteries for hybrid electric vehicles.

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