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

Abstract

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 specific 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 carbonmore » shell. This study also offers guidelines to further enhance the specific capacity of HSi@C anodes in the future.« less

Authors:
; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1394778
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: Electrochimica Acta; Journal Volume: 215
Country of Publication:
United States
Language:
English
Subject:
Anode; Hollow Si nanospheres; Lithium-ion battery; Silicon; Sol-gel processing

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 States: 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 States. 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.. Sat . "Hollow Silicon Nanospheres Encapsulated with a Thin Carbon Shell: An Electrochemical Study". United States. doi:10.1016/j.electacta.2016.08.059.
@article{osti_1394778,
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 = {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 specific 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.},
doi = {10.1016/j.electacta.2016.08.059},
journal = {Electrochimica Acta},
number = ,
volume = 215,
place = {United States},
year = {Sat Oct 01 00:00:00 EDT 2016},
month = {Sat Oct 01 00:00:00 EDT 2016}
}