期刊
RARE METALS
卷 40, 期 2, 页码 374-382出版社
NONFERROUS METALS SOC CHINA
DOI: 10.1007/s12598-020-01444-y
关键词
Electrospinning; Nickel; T-Nb2O5; Nanofiber anode; Lithium-ion batteries
资金
- National Natural Science Foundation of China [51771236, 51901249, U1904216]
- Science Fund for Distinguished Young Scholars of Hunan Province [2018JJ1038]
In this study, nickel/T-Nb2O5 nanoparticles encapsulated in mesoporous carbon nanofibers (Ni/T-Nb2O5@CNFs) were prepared, showing high surface area and mesoporous microstructure. The nanocomposite exhibited excellent capacity and rate performance, making it a promising candidate for anode material in high-power LIBs.
In this work, nickel/T-Nb2O5 nanoparticles encapsulated in mesoporous carbon nanofibers (denoted as Ni/T-Nb2O5@CNFs) are successfully prepared through a simple electrospinning route and succedent heating treatment. The presence of Ni in carbon nanofibers is beneficial for enhancing the electronic conductivity and the initial Coulombic efficiency. Ni/T-Nb2O5 nanoparticles are homogeneously incorporated in carbon nanofibers to form a nanocomposite system, which provides effective buffering during the lithiation/delithiation process for cycling stability. The Ni/T-Nb2O5@CNFs show high surface area (26.321 m(2).g(-1)) and mesoporous microstructure, resulting in higher capacity and excellent rate performance. The Ni/T-Nb2O5@CNFs exhibit a remarkable capacity of 437 mAh.g(-1) at a current density of 0.5 A.g(-1) after 230 cycles and a capacity of 173 mAh.g(-1) at a current density up to 10.0 A.g(-1) after 1400 cycles. This work indicates that nickel/T-Nb2O5 nanoparticles encapsulated in carbon nanofibers can be a promising candidate for anode material in high-power LIBs.
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