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Title: High performance porous Si@C anodes synthesized by low temperature aluminothermic reaction

Abstract

A low temperature (210°C) aluminothermic reduction reaction process has been developed to synthesis porous silicon (Si) as an anode for Li ion battery applications. An eutectic mixture of AlCl3 and ZnCl2 is used as the mediator to reduce the reaction temperature. With carbon pre-coated on the porous SiO2 precursor, porous Si@C core shell structured anodes could be obtained with structure and morphology similar to that of the porous precursor. In addition, carbon coated porous Si also exhibits superior cyclic stability, higher rate performance, and higher coulombic efficiency. The porous Si anode demonstrates a high specific capacity of ~2100 mAh/g at the current density of 1.2 A/g and has a good cycling stability with ~76% capacity retention over 250 cycles. Therefore, it will be a good candidate for anode used in high energy density Li-ion batteries.

Authors:
; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
Sponsoring Org.:
USDOE
OSTI Identifier:
1439006
Report Number(s):
PNNL-SA-130364
Journal ID: ISSN 0013-4686; 49321; VT1201000
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Resource Relation:
Journal Name: Electrochimica Acta; Journal Volume: 269; Journal Issue: C
Country of Publication:
United States
Language:
English
Subject:
silicon; porous Si; anode; aluminothermic reaction; Environmental Molecular Sciences Laboratory

Citation Formats

Mishra, Kuber, Zheng, Jianming, Patel, Rajankumar, Estevez, Luis, Jia, Haiping, Luo, Langli, El-Khoury, Patrick Z., Li, Xiaolin, Zhou, Xiao-Dong, and Zhang, Ji-Guang. High performance porous Si@C anodes synthesized by low temperature aluminothermic reaction. United States: N. p., 2018. Web. doi:10.1016/j.electacta.2018.02.166.
Mishra, Kuber, Zheng, Jianming, Patel, Rajankumar, Estevez, Luis, Jia, Haiping, Luo, Langli, El-Khoury, Patrick Z., Li, Xiaolin, Zhou, Xiao-Dong, & Zhang, Ji-Guang. High performance porous Si@C anodes synthesized by low temperature aluminothermic reaction. United States. doi:10.1016/j.electacta.2018.02.166.
Mishra, Kuber, Zheng, Jianming, Patel, Rajankumar, Estevez, Luis, Jia, Haiping, Luo, Langli, El-Khoury, Patrick Z., Li, Xiaolin, Zhou, Xiao-Dong, and Zhang, Ji-Guang. Sun . "High performance porous Si@C anodes synthesized by low temperature aluminothermic reaction". United States. doi:10.1016/j.electacta.2018.02.166.
@article{osti_1439006,
title = {High performance porous Si@C anodes synthesized by low temperature aluminothermic reaction},
author = {Mishra, Kuber and Zheng, Jianming and Patel, Rajankumar and Estevez, Luis and Jia, Haiping and Luo, Langli and El-Khoury, Patrick Z. and Li, Xiaolin and Zhou, Xiao-Dong and Zhang, Ji-Guang},
abstractNote = {A low temperature (210°C) aluminothermic reduction reaction process has been developed to synthesis porous silicon (Si) as an anode for Li ion battery applications. An eutectic mixture of AlCl3 and ZnCl2 is used as the mediator to reduce the reaction temperature. With carbon pre-coated on the porous SiO2 precursor, porous Si@C core shell structured anodes could be obtained with structure and morphology similar to that of the porous precursor. In addition, carbon coated porous Si also exhibits superior cyclic stability, higher rate performance, and higher coulombic efficiency. The porous Si anode demonstrates a high specific capacity of ~2100 mAh/g at the current density of 1.2 A/g and has a good cycling stability with ~76% capacity retention over 250 cycles. Therefore, it will be a good candidate for anode used in high energy density Li-ion batteries.},
doi = {10.1016/j.electacta.2018.02.166},
journal = {Electrochimica Acta},
number = C,
volume = 269,
place = {United States},
year = {Sun Apr 01 00:00:00 EDT 2018},
month = {Sun Apr 01 00:00:00 EDT 2018}
}