storage systems is one of the crucial parts in realizing the sustainable energy solution. [1][2][3][4] Rechargeable lithium ion batteries have served as an efficient energy storage system for portable electronic devices for the past decades and are expected to be the dominant technology for electric vehicles in the near future. [5,6] The needs for the higher-energy-density batteries are thus escalating so as to equip the electric vehicles with longer mileage at a lower cost. One of the promising solutions to boost the energy density of the lithium ion battery is to replace the graphite anode, which has a limited theoretical specific capacity of 372 mAh g −1 , with lithium metal anode. The lithium metal anode can exhibit an exceptionally high theoretical specific capacity (3860 mAh g −1 ), a low redox potential (−3.04 V vs the standard hydrogen electrode) and a light weight (0.534 g cm −3 ), therefore has been extensively studied for its employment in high-energy-density lithium batteries. [7][8][9][10][11][12] Nevertheless, the commercialization of LMBs have been currently inhibited by the safety problems and the poor cycle life involved with the use of reactive lithium metal anodes.The current understanding of these issues with lithium metal anodes is mainly regarding the non-uniform
The data in this study are related to the research article “Core-shell electrospun and doped LiFePO4/FeS/C composite fibers for Li-ion batteries” [1]. Core-shell LiFePO4/FeS/C composites fiber were prepared via an electrospinning method for use as cathodes in Li-ion batteries. The data presented in this paper showed the effect of electrospinning parameters, including applied voltage, solution flow rate, the concentration of polyvinylpyrrolidone (PVP) (wt%) and a mixed PVP/PEO (polyethylene oxide) (w/w%) polymers on the morphological properties of composites fibers. These data were developed using scanning electron microscopy (SEM). Then, the effect of heat-treatment temperature on fiber morphology was investigated using transmission electron microscopy (TEM). The voltage profile and cycle rate properties of the core-shell LiFePO4/FeS/C composites obtained after various heat treatments were studied.
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