ZnO/TiO 2 /C nanofibers by electrospinning for high-performance lithium storage
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ZnO/TiO2/C nanofibers by electrospinning for highperformance lithium storage Jianguo Zhao1,* Xianming Liu3
, Hongyan Zhou2, Mengjing Jin2, Pengfei Chen1, Shichao Chen1, and
1
School of Physics and Electronic Information, Luoyang Normal University, Luoyang 471934, China School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, China 3 School of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang 471934, China 2
Received: 3 July 2020
ABSTRACT
Accepted: 18 September 2020
Long cyclic stability and high rate performance have been the major challenges of lithium-ion batteries (LIBs). Composite metal oxides as a promising anode materials for LIBs have been studied extensively due to their high theoretical capacity, abundant reserves and large-scale production. Yet, their practical applications are seriously restricted by the volume change and poor conductivity. Herein, the ZnO/ TiO2/C nanofibers with different mole ratios of Ti/Zn were successfully synthesized by electrospinning method. The ZnO/TiO2/C nanofibers with a Zn/Ti mole ratio of 1:1 exhibited the highest reversible capacity of 912 mAh g-1 after 500 cycles at 100 mA g-1. Meanwhile, the ZnO/TiO2/C nanofibers also possess an excellent rate capability even at a high current density up to 5 A g-1. The Coulombic efficiency of ZnO/TiO2/C nanofibers has been steady at around 100% regardless of rate and long cycle. The good electrochemical properties of ZnO/TiO2/C nanofibers with a Zn/Ti mole ratio of 1:1 may be attributed to the synergistic effect of C and the introduction of interface between ZnO and TiO2. Overall, the ZnO/TiO2/C nanofibers were demonstrated unexpectedly high specific capacity retention, high reversibility and excellent rate performance as the anode materials of LIBs.
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Springer Science+Business
Media, LLC, part of Springer Nature 2020
Introduction The fossil energy gradually decreases with the consumption of mankind and the rapid development of portable electronic devices; meanwhile, the
consumption of these fossil fuels has caused a serious environmental pollution problem, so it is an urgent to seek the renewable energy to replace fossil fuel [1]. In addition, energy storage system that possess high energy and power capability, long cycle stability and good reversibility are urgently needed [2, 3]. Among
Handling Editor: Mark Bissett. Jianguo Zhao and Hongyan Zhou have contributed equally to this work.
Address correspondence to E-mail: [email protected]
https://doi.org/10.1007/s10853-020-05363-2
J Mater Sci
all the energy storage devices, LIBs have received great attention due to their ultrahigh power density, ultralong cycling span, environment-friendliness, high safety and low cost [4–6]. In LIBs, graphite is commonly used as anode material. However, its low specific capacity (372 mAh g-1) could not meet the demand of high capacity, fast charge and discharge, etc., which limits the further application. Hence, the development of new high-performance anode materials of LIBs is an important issu
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