Large-scale Ni-MOF derived Ni_3S_2 nanocrystals embedded in N-doped porous carbon nanoparticles for high-rate Na~+ storage |
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Authors: | Miao Yang Qiuli Ning Chaoying Fan Xinglong Wu |
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Affiliation: | 1. National & Local United Engineering Lab for Power Battery, Department of Chemistry, Northeast Normal University, Changchun 130024, China;2. Key Laboratory for UV Light-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, Changchun 130024, China |
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Abstract: | Metal organic framework(MOF) has been confirmed as the promising precursor to develop the conve rsion-typed anode mate rials of sodium-ion batteries(SIBs) because of the tunable structure design and simple functional modification.Here,we prepare the ultrasmall Ni_3S_2 nanocrystals embedded into N-doped porous carbon nanoparticles using the scalable Ni-MOF as precursor(denoted as Ni_3S_2@NPC).The ultrasmall size of Ni_3S_2 can work for accelerated electro n/ion transfer to facilitate the electrochemical reaction kinetics.Moreover,the robust conductivity network originated from N-doped porous carbon nanoparticles can not only improve the electron conductivity,but also enhance the electrode integrity and stability of the electrode/electrolyte interface.In addition,the N heteroatoms provide extra Na storage sites.Accordingly,the electrode delivers the obviously competitive capacities and high-power output with respect to the currently reported Ni_3S_2/C composites.This study provides a scalable and universal strategy to develop the advanced transition metal sulfides for practically feasible SIBs. |
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Keywords: | Sodium-ion batteries Metal organic framework Large-scale preparation N-doped porous carbon |
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