Hollow ZnSnO3 cubes@carbon/reduced graphene oxide ternary composite as anode of lithium ion batteries with enhanced electrochemical performance |
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| Affiliation: | 1. College of Chemistry and Molecular Engineering, Zhengzhou University, No.100, Science Road, Zhengzhou 450001, China;2. College of Chemistry and Environment, Henan Institute of Education, Zhengzhou 450046, China;1. Department of Chemistry, Anna University, Chennai 600025, India;2. Biological Material Laboratory, Central Leather Research Institute, Chennai 600020, India;1. Science and Technology on Thermostructural Composite Materials Laboratory, Northwestern Polytechnical University, Xi''an 710072, PR China;2. College of Aerospace Engineering, Chongqing University, Chongqing 400044, PR China;3. College of Chemistry and Materials Science, Northwest University, Xi'' an 710069, PR China;4. Department of Mechanical Engineering, Khalifa University, Abu Dhabi 127788, UAE |
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| Abstract: | The ternary composite, carbon coated hollow ZnSnO3 (ZS@C) cubes encapsulated in reduced graphene oxide sheets (ZS@C/rGO), was synthesized via low-temperature coprecipitation and colloid electrostatic self-assembly. The uniform carbon-coating layer not only plays a role in buffering the volume change of ZnSnO3 cubes in the charging/discharging processes, but also forms three-dimensional network with the cooperation of graphene to maintain the structural integrity and improve the electrical conductivity. The results show that the reduced graphene oxide sheets encapsulated ZS@C microcubes with a typical core-shell structure of ~700 nm in size exhibit an improved electrochemical performance compared with bare ZS@C microcubes. The ZS@C/rGO electrode delivered an initial discharge capacity of 1984 mA h g−1 at a current density of 0.1 A g−1 and maintained a capacity of 1040 mA h g−1 after 45 cycles. High specific capacity and superior cycle stability indicate that the ZS@C/rGO composite has a great potential for the application of lithium-ion anode material. |
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| Keywords: | Zinc stannate Reduced graphene oxide Hollow Microcubes Lithium-ion batteries |
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