skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Hollow Silicon Nanospheres Encapsulated with a Thin Carbon Shell: An Electrochemical Study

Authors:
; ; ; ; ; ; ;
Publication Date:
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1397557
Grant/Contract Number:
AC02-06CH11357
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Electrochimica Acta
Additional Journal Information:
Journal Volume: 215; Journal Issue: C; Related Information: CHORUS Timestamp: 2017-10-04 21:49:44; Journal ID: ISSN 0013-4686
Publisher:
Elsevier
Country of Publication:
United Kingdom
Language:
English

Citation Formats

Ashuri, Maziar, He, Qianran, Liu, Yuzi, Zhang, Kan, Emani, Satyanarayana, Sawicki, Monica S., Shamie, Jack S., and Shaw, Leon L.. Hollow Silicon Nanospheres Encapsulated with a Thin Carbon Shell: An Electrochemical Study. United Kingdom: N. p., 2016. Web. doi:10.1016/j.electacta.2016.08.059.
Ashuri, Maziar, He, Qianran, Liu, Yuzi, Zhang, Kan, Emani, Satyanarayana, Sawicki, Monica S., Shamie, Jack S., & Shaw, Leon L.. Hollow Silicon Nanospheres Encapsulated with a Thin Carbon Shell: An Electrochemical Study. United Kingdom. doi:10.1016/j.electacta.2016.08.059.
Ashuri, Maziar, He, Qianran, Liu, Yuzi, Zhang, Kan, Emani, Satyanarayana, Sawicki, Monica S., Shamie, Jack S., and Shaw, Leon L.. 2016. "Hollow Silicon Nanospheres Encapsulated with a Thin Carbon Shell: An Electrochemical Study". United Kingdom. doi:10.1016/j.electacta.2016.08.059.
@article{osti_1397557,
title = {Hollow Silicon Nanospheres Encapsulated with a Thin Carbon Shell: An Electrochemical Study},
author = {Ashuri, Maziar and He, Qianran and Liu, Yuzi and Zhang, Kan and Emani, Satyanarayana and Sawicki, Monica S. and Shamie, Jack S. and Shaw, Leon L.},
abstractNote = {},
doi = {10.1016/j.electacta.2016.08.059},
journal = {Electrochimica Acta},
number = C,
volume = 215,
place = {United Kingdom},
year = 2016,
month =
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1016/j.electacta.2016.08.059

Save / Share:
  • In this study we have investigated the electrochemical properties of hollow silicon nanospheres encapsulated with a thin carbon shell, HSi@C, as a potential candidate for lithium-ion battery anodes. Hollow Si nanospheres are formed using a templating method which is followed by carbon coating via carbonization of a pyrrole precursor to form HSi@C. The synthesis conditions and the resulting structure of HSi@C have been studied in detail to obtain the target design of hollow Si nanospheres encapsulated with a carbon shell. The HSi@C obtained exhibits much better electrochemical cycle stability than both micro-and nano-size silicon anodes and deliver a stable specificmore » capacity of 700 mA h g(-1) after 100 cycles at a current density of 2 A g(-1) and 800 mA h g(-1) after 120 cycles at a current density of 1 A g(-1). The superior performance of HSi@C is attributed to the synergistic combination of the nanostructured material, the enhanced conductivity, and the presence of the central void space for Si expansion with little or no change in the volume of the entire HSi@C particle. This study is the first detailed investigation of the synthesis conditions to attain the desired structure of a hollow Si core with a conductive carbon shell. This study also offers guidelines to further enhance the specific capacity of HSi@C anodes in the future.« less
  • ZnS hollow nanospheres with nanoporous shell were successfully synthesized through the evolvement of ZnO nanospheres which were synthesized by hydrothermal method with poly (sodium-p-styrene sulfonate) (PSS) as surfactant at low temperature. The as-synthesized samples were characterized with X-ray diffraction (XRD), transmission electron microscopy (TEM), field emission scanning electron microscopy (FESEM), UV/vis spectrum and N{sub 2} adsorption. The results showed that the shell of as-synthesized ZnS hollow structure was composed of many fine crystallites and had a nanoporous structure with pore diameter about 4 nm demonstrated by N{sub 2} adsorption/desorption isotherm. The sample possessed efficiency of photocatalytic degradation on X-containing (X=Cl,more » Br, I) organic pollutants.« less
  • First principle calculations based on DFT have been performed to study the interaction of monoatomically thin Cu wire with silicon nanotube in armchair configuration having chirality (6, 6) both by placing it inside (encapsulation) and outside (functionalisation) the tube. The lowest energy for positioning monoatomically thin Cu wire inside and outside surfaces of SiNT were found to possess cohesive energies of 4.03 eV and 4.02 eV respectively and hence the stability of both SiNTs is found to be almost same. However, From the electronic band structures study, the conductance in case of SiNT for the encapsulated and functionalized positioning ofmore » the Cu wire have been found to be 2G{sub 0} and 4G{sub 0} respectively showing enhanced conductance for the functionalized SiNT.« less
  • Three types of nitrogen-doped hollow carbon spheres with different pore sized porous shells are prepared to investigate the performance of sulfur confinement. The reason that why no sulfur is observed in previous research is determined and it is successfully demonstrated that the sulfur/polysulfide will overflow the porous carbon during the lithiation process.