Tailored Synthesis of Coral‐like CoTiO 3 /Co 3 O 4 /TiO 2 Nanobelts with Superior Lithium Storage Capability

Tailored Synthesis of Coral‐like CoTiO 3 /Co 3 O 4 /TiO 2 Nanobelts with Superior Lithium Storage Capability
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具有优异储锂能力的珊瑚状CoTiO 3 /Co 3 O 4 /TiO 2 纳米带的定制合成

DOI:
10.1002/ente.201900774
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发表时间:
2020-03
期刊:
影响因子:
3.8
通讯作者:
Qifang Lu
Qifang Lu
中科院分区:
工程技术4区
文献类型:
--
作者:
Hao Liu;Xiaona Wu;Enyan Guo;Qifang Lu

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提出了一种简单而高效的两步电纺焙烧方法,构建了一维珊瑚状CoTiO3/Co3O4/TiO2杂化纳米带。这种一维珊瑚状纳米杂化材料是由均匀分布的CoTiO3纳米带和均匀分布的二次晶Co3O4/TiO2纳米颗粒构建而成的。作为锂离子电池负极材料,CoTiO3/Co3O4/TiO2纳米带电极在250次循环后的可逆容量为722.3 mah g−1,在100 mA g−1下具有良好的循环性能,1000次循环后的容量为256.7 mah g−1,电流密度为2000 mA g−1。高水平的二次纳米构建块提供了大的比表面积、高的表面与体积比和快速的界面离子传输。在这里,它有力地揭示了混合动力车的优雅设计概念,用于制造下一代先进的可充电LIBS。
A facile yet efficient two‐step electrospinning calcination strategy is smartly developed to construct 1D hierarchical coral‐like CoTiO3/Co3O4/TiO2hybrid nanobelts. The 1D coral‐like nanohybrid is homogeneously constructed from well‐dispersed CoTiO3nanobelts and uniformly distributed secondary crystalline Co3O4/TiO2nanoparticle building blocks. When evaluated as anodes for lithium‐ion batteries (LIBs), the hybrid CoTiO3/Co3O4/TiO2nanobelt electrode exhibits a promising reversible capacity of 722.3 mAh g−1at 100 mA g−1after 250 cycles and has excellent cyclability with a capacity of 256.7 mAh g−1after 1000 cycles at a current density of 2000 mA g−1. The imitating 1D coral‐like structural pattern is beneficial to alleviate the nanoparticle agglomeration and increase the contact area with the electrolyte, leading to the short diffusion path and facilitating the rapid transfer of lithium ions. The high‐level secondary nanobuilding blocks offer a large specific surface area, high surface‐to‐bulk ratio, and fast interfacial ion transport. Herein, it strongly sheds light on the elegant design concept of the hybrid for fabricating next‐generation advanced rechargeable LIBs.
原位生长可在介晶 MTiO3(M = Ni、Co、Fe)纳米棒上实现理想的石墨烯封装,从而实现稳定的锂存储
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