Journal ArticleDOI
Facile Synthesis of Si@SiC Composite as an Anode Material for Lithium-Ion Batteries.
TLDR
An outstanding electrochemical performance of Si@SiC-0.5 is attributed to the SiC phase, which acts as a buffer layer that stabilizes the nanostructure of the Si active phase and enhances the electrical conductivity of the electrode.Abstract:
Here, we propose a simple method for direct synthesis of a Si@SiC composite derived from a SiO2@C precursor via a Mg thermal reduction method as an anode material for Li-ion batteries. Owing to the extremely high exothermic reaction between SiO2 and Mg, along with the presence of carbon, SiC can be spontaneously produced with the formation of Si. The synthesized Si@SiC was composed of well-mixed SiC and Si nanocrystallites. The SiC content of the Si@SiC was adjusted by tuning the carbon content of the precursor. Among the resultant Si@SiC materials, the Si@SiC-0.5 sample, which was produced from a precursor containing 4.37 wt % of carbon, exhibits excellent electrochemical characteristics, such as a high first discharge capacity of 1642 mAh g–1 and 53.9% capacity retention following 200 cycles at a rate of 0.1C. Even at a high rate of 10C, a high reversible capacity of 454 mAh g–1 was obtained. Surprisingly, at a fixed discharge rate of C/20, the Si@SiC-0.5 electrode delivered a high capacity of 989 mAh g...read more
Citations
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Journal ArticleDOI
Fabrication and understanding of Cu3Si-Si@carbon@graphene nanocomposites as high-performance anodes for lithium-ion batteries
Zhiming Zheng,Hong-Hui Wu,Huixin Chen,Yong Cheng,Qiaobao Zhang,Qingshui Xie,Laisen Wang,Kaili Zhang,Ming-Sheng Wang,Dong-Liang Peng,Xiao Cheng Zeng +10 more
TL;DR: In this design, the carbon shell, the highly elastic graphene nanosheet, and the formed conductive and inactive Cu3Si phase in Si serve as buffer media to suppress volume variation of Si during lithiation/delithiation processes and to facilitate the formation of a stable solid electrolyte interface (SEI) layer as well as to enable good transport kinetics.
Journal ArticleDOI
Silicon/carbon lithium-ion battery anode with 3D hierarchical macro-/mesoporous silicon network: Self-templating synthesis via magnesiothermic reduction of silica/carbon composite
Xiuxia Zuo,Xiaoyan Wang,Yonggao Xia,Shanshan Yin,Shanshan Yin,Qing Ji,Qing Ji,Zhaohui Yang,Meimei Wang,Xiaofang Zheng,Bao Qiu,Zhaoping Liu,Jin Zhu,Peter Müller-Buschbaum,Ya-Jun Cheng,Ya-Jun Cheng +15 more
TL;DR: In this paper, a 3D hierarchical macro-mesoporous SiO2/C composite is proposed to improve the cyclic performance of the Si anodes by using a self-templating mechanism during the reduction process.
Journal ArticleDOI
Silicon core-mesoporous shell carbon spheres as high stability lithium-ion battery anode
TL;DR: Compared to bare Si anode, the SCMSC anode exhibits much higher Li storage capacity, superior cyclability, and good rate capability, highlighting the advantages of hierarchical MSC in theSCMSC structure.
Journal ArticleDOI
Designing of hierarchical mesoporous/macroporous silicon-based composite anode material for low-cost high-performance lithium-ion batteries
TL;DR: In this paper, a mass-produced and low-cost hierarchical mesoporous/macroporous silicon-based composite material with an ample porous structure and dual carbon protective layers has been rationally designed and constructed.
Proceedings ArticleDOI
Achievements And Perspectives Of Fiber Gyros
TL;DR: In this article, the concept of inertial fiber motion sensors based upon the Kennedy-Thorndike interferometer is introduced, which can enable inertial strapdown navigation without accelerometers.
References
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Journal ArticleDOI
Facile Synthesis of Carbon-Coated Silicon/Graphite Spherical Composites for High-Performance Lithium-Ion Batteries
TL;DR: It is suggested that a rational design of the Si/carbon/graphite composite is mainly responsible for delivering a high reversible capacity and stable cycle performance and the proposed synthetic route is simple and cost-effective for mass production.
Journal ArticleDOI
Low-Temperature Pseudomorphic Transformation of Ordered Hierarchical Macro-mesoporous SiO2/C Nanocomposite to SiC via Magnesiothermic Reduction
Yifeng Shi,Fan Zhang,Yong-Sheng Hu,Xiaohong Sun,Yichi Zhang,Hyung Ik Lee,Liquan Chen,Galen D. Stucky +7 more
TL;DR: A magnesiothermic reduction synthesis approach is reported for direct conversion of SiO(2)/C composite nanostructures to corresponding SiC materials without losing their nanostructure morphologies.
Journal ArticleDOI
Highly Connected Silicon–Copper Alloy Mixture Nanotubes as High‐Rate and Durable Anode Materials for Lithium‐Ion Batteries
Hucheng Song,Hong Xiang Wang,Zixia Lin,Xiaofan Jiang,Linwei Yu,Jun Xu,Zhongwei Yu,Xiaowei Zhang,Yijie Liu,Ping He,Lijia Pan,Yi Shi,Haoshen Zhou,Kunji Chen +13 more
Journal ArticleDOI
Precise Perforation and Scalable Production of Si Particles from Low-Grade Sources for High-Performance Lithium Ion Battery Anodes.
TL;DR: Being able to produce particles with precise porosity control through scalable processes from low-grade materials, it is expected that this nanoperforation may play a role in the next generation lithium ion battery anodes, as well as many other potential applications such as optoelectronics and thermoelectrics.
Journal ArticleDOI
Carbon-Coated Silicon Nanowires on Carbon Fabric as Self-Supported Electrodes for Flexible Lithium-Ion Batteries.
Xiaolei Wang,Ge Li,Min Ho Seo,Gregory Lui,Fathy M. Hassan,Kun Feng,Xingcheng Xiao,Zhongwei Chen +7 more
TL;DR: A novel self-supported electrode with long cycling life and high mass loading, based on carbon-coated Si nanowires grown in situ on highly conductive and flexible carbon fabric substrates through a nickel-catalyzed one-pot atmospheric pressure chemical vapor deposition, holds great promise in future practical applications in high energy density lithium-ion batteries.