scholarly journals MnO2 Heterostructure on Carbon Nanotubes as Cathode Material for Aqueous Zinc-Ion Batteries

2020 ◽  
Vol 21 (13) ◽  
pp. 4689 ◽  
Author(s):  
Sonti Khamsanga ◽  
Mai Thanh Nguyen ◽  
Tetsu Yonezawa ◽  
Patchanita Thamyongkit ◽  
Rojana Pornprasertsuk ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Cathode Material ◽  
Discharge Capacity ◽  
Rate Capability ◽  
Zinc Ion ◽  
Cycling Stability ◽  
Ion Diffusion ◽  
Energy Devices ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Due to their cost effectiveness, high safety, and eco-friendliness, zinc-ion batteries (ZIBs) are receiving much attention nowadays. In the production of rechargeable ZIBs, the cathode plays an important role. Manganese oxide (MnO2) is considered the most promising and widely investigated intercalation cathode material. Nonetheless, MnO2 cathodes are subjected to challenging issues viz. limited capacity, low rate capability and poor cycling stability. It is seen that the MnO2 heterostructure can enable long-term cycling stability in different types of energy devices. Herein, a versatile chemical method for the preparation of MnO2 heterostructure on multi-walled carbon nanotubes (MNH-CNT) is reported. Besides, the synthesized MNH-CNT is composed of δ-MnO2 and γ-MnO2. A ZIB using the MNH-CNT cathode delivers a high initial discharge capacity of 236 mAh g−1 at 400 mA g−1, 108 mAh g−1 at 1600 mA g−1 and excellent cycling stability. A pseudocapacitive behavior investigation demonstrates fast zinc ion diffusion via a diffusion-controlled process with low capacitive contribution. Overall, the MNH-CNT cathode is seen to exhibit superior electrochemical performance. This work presents new opportunities for improving the discharge capacity and cycling stability of aqueous ZIBs.

Effect of multi-walled carbon nanotubes on the thermal stability and surface morphology of LiFePO4 cathode material

2013 ◽  
Vol 28 (1) ◽  
pp. 1-7 ◽  
Author(s):  
Mária Filkusová ◽  
Andrea Fedorková ◽  
Renáta Oriňáková ◽  
Andrej Oriňák ◽  
Zuzana Nováková ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Thermal Stability ◽  
Surface Morphology ◽  
Cathode Material ◽  
Multi Walled Carbon Nanotubes ◽  
Lifepo4 Cathode ◽  
Walled Carbon Nanotubes

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.

Enhanced cycling stability of ring-shaped phosphorus inside multi-walled carbon nanotubes as anodes for lithium-ion batteries

2018 ◽  
Vol 6 (6) ◽  
pp. 2540-2548 ◽  
Author(s):  
Dan Zhao ◽  
Jinying Zhang ◽  
Chengcheng Fu ◽  
Jialiang Huang ◽  
Dingbin Xiao ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Cycling Stability ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

The cycling stability of ring-shaped phosphorus as anodes for lithium-ion batteries is significantly enhanced by the encapsulation of carbon nanotubes.

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