Exploration of amorphous hollow FeOOH@C nanosphere on energy storage for sodium ion batteries |
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Authors: | Zhipeng Zhao Chuanqi Li Zhongyi Liu Dan Li |
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Affiliation: | 1. College of Chemistry, Zhengzhou University, Zhengzhou, Henan, 450001, PR China;2. Green Catalysis Center, College of Chemistry, Zhengzhou University, Zhengzhou, Henan, 450001, PR China |
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Abstract: | Sodium ion batteries (SIBs) have enjoyed a high profile in recent years and gradually been commercialized to supplement the lithium-ion batteries system. However, the large volume expansion of anode materials within discharging and low electrical conductivity hinder the application of SIBs. In this work, a FeOOH@C composite was synthesized with the use of hydrothermal method and pyrolyzing of polydopamine. The amorphous FeOOH exhibits a hollow spherical structure to offer free space for buffering the volumetric variation. Furthermore, the outer carbon served as a protective shell could maintain the sphere integrity and enhance the electrical conductivity. Hence, benefiting from the achieved synergy of the hollow architecture, amorphous structure and carbon shell, the composite presented a long cycle life (316 mA h g?1 after 500 cycles at a current density of 100 mA g?1 and 234.5 mA h g?1 after 400 cycles at 2 A g?1) and high-rate performance (180 mA h g?1 at 5 A g?1), revealing a potential to be a promising candidate for electrode material of SIBs. |
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Keywords: | Amorphous FeOOH Hollow nanosphere Anode material Sodium ion batteries |
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