1. Hollow Li2FeSiO4 spheres as cathode and anode material for lithium-ion battery
- Author
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Chih Hao Tsao, Ping Lin Kuo, Hong Ping Lin, Tai Ran Du, and Chun Han Hsu
- Subjects
Materials science ,Scanning electron microscope ,Mechanical Engineering ,Composite number ,Metals and Alloys ,chemistry.chemical_element ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Electrochemistry ,01 natural sciences ,Cathode ,Lithium-ion battery ,0104 chemical sciences ,law.invention ,Anode ,Chemical engineering ,chemistry ,Mechanics of Materials ,law ,Transmission electron microscopy ,Materials Chemistry ,0210 nano-technology ,Carbon - Abstract
Hollow Li2FeSiO4 spheres have been successfully prepared using hollow silica spheres as both reactant and template, for which the thickness of the nanoscale Li2FeSiO4 thin shells are about 50 nm. Then, the hollow Li2FeSiO4 spheres were coated by phenolic resin as a carbon precursor to obtain the hollow Li2FeSiO4/Carbon sphere (HLFS/C) composite. The structure characterizations by X-ray diffraction, transmission electron microscopy and scanning electron microscopy show that the HLFS/Cs are hollow structures with high purity. When used as the cathode material under charge/discharge rates at 0.05C (1C = 166 mAh g−1), the HLFS/C exhibited a capacity of 155 mAh g−1 with good cycle stability. Furthermore, the HLFS exhibited capacities of 820, 650 and 420 mAh g−1 for 0.15C, 0.3C and 0.6C rates for anode application, respectively, with good cycle stability. The hollow structure of HLFS/C enables us to overcome the aggregation and structural instability problems, which is essential for the improvement of the electrochemical performance.
- Published
- 2019
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