scholarly journals Electrochemical Performance of FeF3·0.33H2O/MWCNTs Composite Cathode Synthesized by Solvothermal Process

2015 ◽  
Vol 18 (2) ◽  
pp. 103-109 ◽  
Author(s):  
Yanli Zhang ◽  
Li Wang ◽  
Jianjun Li ◽  
Xiangming He ◽  
Lei Wen ◽  
...  
Keyword(s):  
High Capacity ◽  
Rate Capability ◽  
Lithium Ion ◽  
Composite Cathode ◽  
Solvothermal Reaction ◽  
Multi Walled Carbon Nanotubes ◽  
Energy Storage Applications ◽  
Walled Carbon Nanotubes ◽  
Structural Characterizations ◽  
Good Rate Capability

This paper reports a FeF3·0.33H2O/multi-walled carbon nanotubes (MWCNTs) composite for energy storage applications. The composite material is prepared by solvothermal reaction with FeF3·3H2O and MWCNTs as precursors, and FeF3·3H2O was removed of crystalliferous water and converted to FeF3·0.33H2O during solvothermal treatment. Structural characterizations show that FeF3·0.33H2O that crystalline with a diameter of about 30 nm were distributed in the network of MWCNTs. As a cathode material for lithium ion batteries, FeF3·0.33H2O/MWCNTs was superior to pure FeF3·0.33H2O in terms of high capacity (an initial capacity of 181 mAh g-1 in 2.0-4.3 V at 20 mA g-1), good cycleability (50% capacity retension at 50th cycle) and good rate capability (116 mAh g-1 at 100 mA g-1). The enhanced performances were attributed to the conductive MWCNT network which improved the electron transport ability and buffered volume change of the cathode.

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.

scholarly journals Novel ternary nanocomposites of MWCNTs/PANI/MoS 2 : preparation, characterization and enhanced electrochemical capacitance

2018 ◽  
Vol 5 (1) ◽  
pp. 171365 ◽  
Author(s):  
Ranran Zhang ◽  
Yu Liao ◽  
Shuangli Ye ◽  
Ziqiang Zhu ◽  
Jun Qian
Keyword(s):  
Rate Capability ◽  
Cyclic Voltammogram ◽  
X Ray Diffraction ◽  
Electron Microscopies ◽  
Transmission Electron ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Good Rate Capability ◽  
A Current

In this work, nanoflower-like MoS 2 grown on the surface of multi-walled carbon nanotubes (MWCNTs)/polyaniline (PANI) nano-stem is synthesized via a facile in situ polymerization and hydrothermal method. Such a novel hierarchical structure commendably promotes the contact of PANI and electrolyte for faradaic energy storage. In the meanwhile, the double-layer capacitance of MoS 2 is effectively used. The morphology and chemical composition of the as-prepared samples are characterized by scanning and transmission electron microscopies, X-ray diffraction and Fourier transform infrared spectra. The electrochemical performance of the samples is evaluated by cyclic voltammogram and galvanostatic charge–discharge measurements. It is found that the specific capacitance of the obtained MWCNTs/PANI/MoS 2 hybrid is 542.56 F g −1 at a current density of 0.5 A g −1 . Furthermore, the MWCNTs/PANI/MoS 2 hybrid also exhibits good rate capability (62.5% capacity retention at 10 A g −1 ) and excellent cycling stability (73.71% capacitance retention) over 3000 cycles.

NH4V3O8/carbon nanotubes composite cathode material with high capacity and good rate capability

2011 ◽  
Vol 196 (22) ◽  
pp. 9786-9791 ◽  
Author(s):  
Haiyan Wang ◽  
Kelong Huang ◽  
Yu Ren ◽  
Xiaobing Huang ◽  
Suqin Liu ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Cathode Material ◽  
High Capacity ◽  
Rate Capability ◽  
Composite Cathode ◽  
Composite Cathode Material ◽  
Good Rate Capability

FeOx@carbon yolk/shell nanowires with tailored void spaces as stable and high-capacity anodes for lithium ion batteries

2016 ◽  
Vol 4 (32) ◽  
pp. 12487-12496 ◽  
Author(s):  
Xueying Li ◽  
Yuanyuan Ma ◽  
Guozhong Cao ◽  
Yongquan Qu
Keyword(s):  
Lithium Ion Batteries ◽  
Structural Integrity ◽  
Electrical Contact ◽  
High Capacity ◽  
Rate Capability ◽  
Lithium Ion ◽  
Void Space ◽  
Good Rate Capability ◽  
Shell Nanowires ◽  
Good Electrical Contact

Porous FeOx@C yolk/shell nanowires with optimized void space delivered a stable cyclability over 400 cycles, high capacities and a good rate capability. The optimized void space contributes to preserve structural integrity and maintain good electrical contact between FeOx and C.

HIGH POWER PERFORMANCE OF MULTICOMPONENT OLIVINE CATHODE MATERIAL FOR LITHIUM-ION BATTERIES

2011 ◽  
Vol 04 (03) ◽  
pp. 299-303 ◽  
Author(s):  
ZHUO TAN ◽  
PING GAO ◽  
FUQUAN CHENG ◽  
HONGJUN LUO ◽  
JITAO CHEN ◽  
...  
Keyword(s):  
Transition Metal ◽  
Cathode Material ◽  
High Capacity ◽  
Rate Capability ◽  
Lithium Ion ◽  
Coprecipitation Method ◽  
Homogeneous Distribution ◽  
Power Performance ◽  
X Ray ◽  
Carbon Coated

A multicomponent olivine cathode material, LiMn0.4Fe0.6PO4 , was synthesized via a novel coprecipitation method of the mixed transition metal oxalate. X-ray diffraction patterns indicate that carbon-coated LiMn0.4Fe0.6PO4 has been prepared successfully and that LiMn0.4Fe0.6PO4/C is crystallized in an orthorhombic structure without noticeable impurity. Homogeneous distribution of Mn and Fe in LiMn0.4Fe0.6PO4/C can be observed from the scanning electron microscopy (SEM) and the corresponding energy dispersive X-ray spectrometry (EDS) analysis. Hence, the electrochemical activity of each transition metal in the olivine synthesized via coprecipitation method was enhanced remarkably, as indicated by the galvanostatic charge/discharge measurement. The synthesized LiMn0.4Fe0.6PO4/C exhibits a high capacity of 158.6 ± 3 mAhg-1 at 0.1 C, delivering an excellent rate capability of 122.6 ± 3 mAhg-1 at 10 C and 114.9 ± 3 mAhg-1 at 20 C.

scholarly journals High Discharge Rate Lithium Ion Batteries with the Composite Cathode of LiFePO4/Mesocarbon Nanobead

2010 ◽  
Vol 177 ◽  
pp. 208-210
Author(s):  
Yi Jie Gu ◽  
Cui Song Zeng ◽  
Yu Bo Chen ◽  
Hui Kang Wu ◽  
Hong Quan Liu ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Room Temperature ◽  
Discharge Rate ◽  
Rate Capability ◽  
Lithium Ion ◽  
Composite Cathode ◽  
Rate Performance ◽  
High Discharge ◽  
High Discharge Rate ◽  
Lifepo4 Cathode

Olivine compounds LiFePO4 were prepared by the solid state reaction, and the electrochemical properties were studied with the composite cathode of LiFePO4/mesocarbon nanobead. High discharge rate performance can be achieved with the designed composite cathode of LiFePO4/mesocarbon nanobead. According to the experiment results, batteries with the composite cathode deliver discharge capacity of 1087mAh for 18650 type cell at 20C discharge rate at room temperature. The analysis shows that the uniformity of mesocarbon nanobead around LiFePO4 can supply enough change for electron transporting, which can enhance the rate capability for LiFePO4 cathode lithium ion batteries. It is confirmed that lithium ion batteries with LiFePO4 as cathode are suitable to electric vehicle application.

An artificial sea urchin with hollow spines: improved mechanical and electrochemical stability in high-capacity Li–Ge batteries

Nanoscale ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 5812-5816 ◽  
Author(s):  
Jinyun Liu ◽  
Xirong Lin ◽  
Tianli Han ◽  
Qianqian Lu ◽  
Jiawei Long ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Sea Urchin ◽  
Specific Capacity ◽  
High Capacity ◽  
Rate Capability ◽  
Lithium Ion ◽  
Electrochemical Stability ◽  
High Rate ◽  
High Rate Capability ◽  
High Specific Capacity

Metallic germanium (Ge) as the anode can deliver a high specific capacity and high rate capability in lithium ion batteries.

Understanding the formation of ultrathin mesoporous Li4Ti5O12 nanosheets and their application in high-rate, long-life lithium-ion anodes

Nanoscale ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 520-531 ◽  
Author(s):  
Dongdong Wang ◽  
Zhongqiang Shan ◽  
Jianhua Tian ◽  
Zheng Chen
Keyword(s):  
High Capacity ◽  
Rate Capability ◽  
Lithium Ion ◽  
Cycling Stability ◽  
High Rate ◽  
High Rate Capability ◽  
Long Life ◽  
Excellent Cycling Stability

Ultrathin mesoporous Li4Ti5O12 nanosheets, which offer high capacity, high rate capability and excellent cycling stability, were synthesized in a controlled fashion.

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