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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 Name | Affiliation | E-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 | |
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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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