Nitrogen-doped carbon-coated Ti–Fe–O nanocomposites with enhanced reversible capacity and rate capability for high-performance lithium-ion batteries

RSC Advances ◽  
2016 ◽  
Vol 6 (69) ◽  
pp. 65266-65274 ◽  
Author(s):  
Tao Li ◽  
Xue Bai ◽  
Ning Lun ◽  
Yong-Xin Qi ◽  
Yun Tian ◽  
...  

An N-doped carbon-coated Ti–Fe–O multicomponent nanocomposite with a moderate Ti/Fe molar ratio of 1 : 2 exhibits good cycling performance as well as outstanding rate capability.

2019 ◽  
Vol 7 (13) ◽  
pp. 7691-7700 ◽  
Author(s):  
Huanhui Chen ◽  
Jiao He ◽  
Yongliang Li ◽  
Shan Luo ◽  
Lingna Sun ◽  
...  

The free-standing CuOx–Co3O4@PNCNF anode delivers high specific capacity, rate capability, and cycling performance for lithium-ion batteries.


2013 ◽  
Vol 1540 ◽  
Author(s):  
Chia-Yi Lin ◽  
Chien-Te Hsieh ◽  
Ruey-Shin Juang

ABSTRACTAn efficient microwave-assisted polyol (MP) approach is report to prepare SnO2/graphene hybrid as an anode material for lithium ion batteries. The key factor to this MP method is to start with uniform graphene oxide (GO) suspension, in which a large amount of surface oxygenate groups ensures homogeneous distribution of the SnO2 nanoparticles onto the GO sheets under the microwave irradiation. The period for the microwave heating only takes 10 min. The obtained SnO2/graphene hybrid anode possesses a reversible capacity of 967 mAh g-1 at 0.1 C and a high Coulombic efficiency of 80.5% at the first cycle. The cycling performance and the rate capability of the hybrid anode are enhanced in comparison with that of the bare graphene anode. This improvement of electrochemical performance can be attributed to the formation of a 3-dimensional framework. Accordingly, this study provides an economical MP route for the fabrication of SnO2/graphene hybrid as an anode material for high-performance Li-ion batteries.


Ionics ◽  
2019 ◽  
Vol 25 (12) ◽  
pp. 5799-5807
Author(s):  
Xinglian Liu ◽  
Yanshuang Meng ◽  
Ruinian Li ◽  
Mengqi Du ◽  
Fuliang Zhu ◽  
...  

2015 ◽  
Vol 39 (12) ◽  
pp. 9782-9788 ◽  
Author(s):  
Shanliang Chen ◽  
Qunli Tang ◽  
Xiaohua Chen ◽  
Lanyan Tan

High performance conductive networks, which were fabricated from a nitrogen-doped carbon layer and 3D CNT networks, have been prepared.


2016 ◽  
Vol 7 (7) ◽  
pp. 4284-4290 ◽  
Author(s):  
Yinghui Wang ◽  
Xing Ding ◽  
Fan Wang ◽  
Junqi Li ◽  
Shuyan Song ◽  
...  

We prepared N-doped double carbon coated MnO composites and explored their applications in lithium ion batteries and oxygen reduction reaction.


2016 ◽  
Vol 209 ◽  
pp. 299-307 ◽  
Author(s):  
Min-Gi Jeong ◽  
Mobinul Islam ◽  
Hoang Long Du ◽  
Yoon-Sung Lee ◽  
Ho-Hyun Sun ◽  
...  

NANO ◽  
2020 ◽  
Vol 15 (10) ◽  
pp. 2050128 ◽  
Author(s):  
Ruirui Gao ◽  
Suqin Wang ◽  
Zhaoxiu Xu ◽  
Hongbo Li ◽  
Shuiliang Chen ◽  
...  

In this work, we developed a simple one-step hydrothermal method to successfully prepare Fe3O4/FeS-reduced graphene oxide (Fe3O4/FeS/rGO) composite directly, which is a novel Lithium-ion batteries (LIBs) anode material. The characterization of Fe3O4/FeS/rGO composite demonstrates that octahedral Fe3O4/FeS particles are uniformly deposited on the rGO, leading to a strong synergy between them. The excellent structural design can make Fe3O4/FeS/rGO composite to have higher reversible capacity (744.7[Formula: see text]mAh/g at 0.1[Formula: see text]C after 50 cycles), excellent cycling performance and superior rate capability. This outstanding electrochemical behavior can be attributed to the conductivity network of rGO, which improves the composite electrode conductivity, facilitates the diffusion and transfer of ions and prevents the aggregation and pulverization of Fe3O4/FeS particles during the charging and discharging processes. Moreover, the Fe3O4/FeS/rGO electrode surface is covered with a thin solid-electrolyte interface (SEI) film and the octahedral structure of Fe3O4/FeS particles is still clearly visible, which indicates that composite electrode has excellent interface stability. We believe that the design of this composite structure will provide a new perspective for the further study of other transition metal oxides for LIBs.


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