Journal
NANOSCALE RESEARCH LETTERS
Volume 12, Issue -, Pages -Publisher
SPRINGER
DOI: 10.1186/s11671-017-2226-2
Keywords
Lithium-ion battery; Anode; SiO2@C/MWNT composite; Sol-gel synthesis
Funding
- National Natural Science Foundation of China [21406052]
- Program for the Outstanding Young Talents of Hebei Province [BJ2014010]
- Scientific Research Foundation for Selected Overseas Chinese Scholars, Ministry of Human Resources and Social Security of China [CG2015003002]
- Ministry of Education and Science of the Republic of Kazakhstan [0143/PCF-14]
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Carbon-coated silica nanoparticles anchored on multi-walled carbon nanotubes (SiO2@C/MWNT composite) were synthesized via a simple and facile sol-gel method followed by heat treatment. Scanning and transmission electron microscopy (SEM and TEM) studies confirmed densely anchoring the carbon-coated SiO2 nanoparticles onto a flexible MWNT conductive network, which facilitated fast electron and lithium-ion transport and improved structural stability of the composite. As prepared, ternary composite anode showed superior cyclability and rate capability compared to a carbon-coated silica counterpart without MWNT (SiO2@C). The SiO2@C/MWNT composite exhibited a high reversible discharge capacity of 744 mAh g(-1) at the second discharge cycle conducted at a current density of 100 mA g(-1) as well as an excellent rate capability, delivering a capacity of 475 mAh g(-1) even at 1000 mA g(-1). This enhanced electrochemical performance of SiO2@C/MWNT ternary composite anode was associated with its unique core-shell and networking structure and a strong mutual synergistic effect among the individual components.
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