Facile synthesis of flower-like T-Nb 2 O 5 nanostructures as anode materials for lithium-ion battery
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Facile synthesis of flower-like T-Nb2O5 nanostructures as anode materials for lithium-ion battery Xiaoxiao Qu1,2, Baolin Xing2, Guangxu Huang2, Huihui Zhao3, Zhendong Jiang2, Chuanxiang Zhang2,* , Suck Won Hong1,*, and Yijun Cao4 1
Department of Cogno-Mechatronics Engineering, Department of Optics and Mechatronics Engineering, Pusan National University, Busan 46241, Republic of Korea 2 College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo 454000, China 3 School of Mathematics and Physics, Anyang Institute of Technology, Anyang 455000, China 4 Henan Province Industrial Technology Research Institute of Resources and Materials, Zhengzhou University, Zhengzhou 450001, China
Received: 2 September 2020
ABSTRACT
Accepted: 9 November 2020
As a model quasi-2D network intercalation electrodes, niobium pentoxide (Nb2O5) has gained numerous attention in electrochemical materials because of its structural stability and high safety. Nevertheless, Nb2O5 exhibits the inherent low conductivity of transition metal oxides, which limits the rate of ionic diffusion and charge transfer. To overcome the drawbacks, the nanoscale Nb2O5 can be synthesized to improve electrochemical performance. Here, we prepared the flower-like orthorhombic Nb2O5 (i.e., T-Nb2O5) nanostructures to evaluate the effect of Nb2O5 nanoparticle morphology associated with crystallinity for lithium-ion batteries (LIBs) anode. T-Nb2O5-2 displays superior crystallinity, pore structure, capacity, reversibility, and cycling stability. Specifically, T-Nb2O5-2 exhibits the initial charge/discharge capacity of 289 and 525 mAh g-1 at 0.1 C, and after 100 cycles, the capacity is 178.2 mAh g-1 at 1 C when the solvothermal time is 16 h. This study shows that Nb2O5 with good crystallinity can slow down the volume expansion and structural deformation generated during the intercalation–deintercalation of Li-ions. We believe that the specified Nb2O5 presented in this work has great potential as a promising candidate for high-performance LIB anodes.
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Springer Science+Business
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1 Introduction LIBs have occupied a large proportion of energy storage systems because of the merits of high energy density, portable volume, and environmental
friendliness [1–7]. Among the rechargeable devices [8–10], the LIBs store Li-ions and electrons in electrodes by intercalation and conversion reactions, maximizing the energy density per unit volume with a large potential difference between the anode and
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https://doi.org/10.1007/s10854-020-04865-8
J Mater Sci: Mater Electron
cathode. For most commercially successful electrodes, carbon-based materials, such as graphite, have been utilized as the main source in the LIB anodes [11–15]. However, since the graphite has a similar intercalation voltage with lithium metal, it is inevitable to generate dendrites during the intercalation and deintercalation process of Li? and further penetrate the separator
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