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Synthesis and Electrochemical Performances of Three-Dimensionally Ordered Macroporous Fe2SiO4/SiO2@C Nano-Glass-Ceramic Materials as an Anode for Lithium-Ion Batteries
Author NameAffiliationE-mail
SUN Ru New Energy Materials and Devices Laboratory, School of Materials Science and Engineering, Chang'an University, Xi'an 710064, China  
LI Dong-Lin New Energy Materials and Devices Laboratory, School of Materials Science and Engineering, Chang'an University, Xi'an 710064, China donglinli@hotmail.com 
CHEN Guang-Qi New Energy Materials and Devices Laboratory, School of Materials Science and Engineering, Chang'an University, Xi'an 710064, China  
ZHANG Wei New Energy Materials and Devices Laboratory, School of Materials Science and Engineering, Chang'an University, Xi'an 710064, China  
FAN Xiao-Yong New Energy Materials and Devices Laboratory, School of Materials Science and Engineering, Chang'an University, Xi'an 710064, China  
GOU Lei New Energy Materials and Devices Laboratory, School of Materials Science and Engineering, Chang'an University, Xi'an 710064, China  
WANG Yan-Ru New Energy Materials and Devices Laboratory, School of Materials Science and Engineering, Chang'an University, Xi'an 710064, China  
CHENG Yi-Ni New Energy Materials and Devices Laboratory, School of Materials Science and Engineering, Chang'an University, Xi'an 710064, China  
ZHAO Zhen-Zhen New Energy Materials and Devices Laboratory, School of Materials Science and Engineering, Chang'an University, Xi'an 710064, China  
Abstract: A three-dimensionally ordered macroporous (3DOM) Fe2SiO4/SiO2@C nano-glass-ceramic as an anode material for lithium-ion battery is successfully synthesized using a polystyrene (PS) colloidal crystal nano-casting and post-calcination. After a gel is calcined at 650℃ under an argon atmosphere, Fe2SiO4 nanocrystals grow from iron-containing SiO2-based glass, resulting in 3DOM nano-glass-ceramic consisted of Fe2SiO4 nanocrystals, Fe3+-doped glassy SiO2 and amorphous carbon. The resultant 3DOM Fe2SiO4/SiO2@C nano-glass-ceramic exhibits a highly reversible discharge capacity up to 450 mAh·g-1 at a current density of 50 mA·g-1, and 260 mAh·g-1 at 250 mA·g-1 in the voltage range of 0.05~3.0 V, while the 3DOM amorphous SiO2@C composite with same porous structure only delivers 15 mAh·g-1 at 50 mA·g-1. Compared to the 3DOM amorphous SiO2@C composite, the 3DOM Fe2SiO4/SiO2@C nano-glass-ceramic anode exhibits a significantly improved capacity and high-rate performancse. These results mean that the Fe2SiO4 and Fe3+ can enhance reversible lithium storage capability and high-rate performances of SiO2-based nano-glass-ceramics.
Keywords: lithium-ion battery  SiO2  nano-glass-ceramic  three-dimensionally ordered macroporous
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SUN Ru,LI Dong-Lin,CHEN Guang-Qi,ZHANG Wei,FAN Xiao-Yong,GOU Lei,WANG Yan-Ru,CHENG Yi-Ni,ZHAO Zhen-Zhen.Synthesis and Electrochemical Performances of Three-Dimensionally Ordered Macroporous Fe2SiO4/SiO2@C Nano-Glass-Ceramic Materials as an Anode for Lithium-Ion Batteries[J].Chinese Journal of Inorganic Chemistry,2017,33(3):471-478.
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Chinese Journal of Inorganic Chemistry