Rational design of three-dimensional graphene encapsulated core–shell FeS@carbon nanocomposite as a flexible high-performance anode for sodium-ion batteries

2018 ◽  
Vol 6 (15) ◽  
pp. 6414-6421 ◽  
Author(s):  
Fanxing Bu ◽  
Peitao Xiao ◽  
Jiadong Chen ◽  
Mohamed F. Aly Aboud ◽  
Imran Shakir ◽  
...  

Three-dimensional graphene encapsulated core–shell FeS@carbon nanocomposite have been fabricated based on spatially confined phase separation of MOF and then employed as a flexible high-performance anode for sodium-ion batteries.

2018 ◽  
Vol 122 (39) ◽  
pp. 22232-22240 ◽  
Author(s):  
Huajun Tian ◽  
Yujia Liang ◽  
Joseph Repac ◽  
Shunlong Zhang ◽  
Chao Luo ◽  
...  

Author(s):  
Siyan Li ◽  
Yiheng Shen ◽  
Dongyuan Ni ◽  
Qian Wang

Three-dimensional (3D) porous metallic carbon allotropes composed of graphene nanoribbons have attracted increasing attention in recent years because of their novel properties, especially for their potential as the anode materials...


2017 ◽  
Vol 5 (19) ◽  
pp. 9169-9176 ◽  
Author(s):  
Sainan Liu ◽  
Zhenyang Cai ◽  
Jiang Zhou ◽  
Mengnan Zhu ◽  
Anqiang Pan ◽  
...  

Herein, we report the rational design of a simple hydrothermal reaction for the first time to prepare interlaced Sb2O3nanosheets and Sb2S3micro-nanospheres, grown on carbon fiber cloth, for application as flexible electrodes in sodium-ion batteries and sodium-ion capacitors with excellent electrochemical performance.


RSC Advances ◽  
2018 ◽  
Vol 8 (5) ◽  
pp. 2477-2484 ◽  
Author(s):  
Linfeng Fei ◽  
Ming Xu ◽  
Juan Jiang ◽  
Sheung Mei Ng ◽  
Longlong Shu ◽  
...  

A single-step, template-free, high-throughput synthesis method is developed to produce graphene/MoS2composites for improved performances in sodium-ion batteries.


Author(s):  
Ya-Ping Wang ◽  
B. P. Hou ◽  
Xin-Rui Cao ◽  
Shunqing Wu ◽  
Zi-Zhong Zhu

Abstract Prussian blue analogs (Na2FeFe(CN)6) have been regarded as potential cathode materials for sodium-ion batteries (SIBs) due to their low-cost iron resources and open framework. Herein, the detailed first-principles calculations have been performed to investigate the electrochemical properties of NaxFeFe(CN)6 during Na ion extraction. The material undergoes a phase transition from a dense rhombohedral to open cubic structure upon half-desodiation, which is resulted from competition of the Na−N Coulomb attraction and d−π covalent bonding of Fe−N. The analyses on the density of states, magnetic moments and Bader charges of NaxFeFe(CN)6 reveal that there involve in the successive redox reactions of high-spin Fe2+/Fe3+ and low-spin Fe2+/Fe3+ couples during desodiation. Moreover, the facile three-dimensional diffusion channels for Na+ ions exhibit low diffusion barriers of 0.4 eV ~ 0.44 eV, which ensures a rapid Na+ transport in the NaxFeFe(CN)6 framework, contributing to high rate performance of the battery. This study gives a deeper understanding of the electrochemical mechanisms of NaxFeFe(CN)6 during Na+ extraction, which is beneficial for the rational design of superior PBA cathodes for SIBs.


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