Construction of carbon-coated nickel phosphide nanoparticle assembled submicrospheres with enhanced electrochemical properties for lithium/sodium-ion batteries

JOURNAL OF COLLOID AND INTERFACE SCIENCE

卷:538

Article

Wang, Jiamei^1,3  Wang, Beibei^1,3  Liu, Xiaojie^2,3  Wang, Gang^1,3  Wang, Hui^2,3  Bai, Jintao^1,3 

[1] Northwest Univ, State Key Lab Incubat Base Photoelect Technol & F, Int Collaborat Ctr Photoelect Technol & Nano Func, Inst Photon & Phototechnol, Xian 710069, Peoples R China

[2] Northwest Univ, Key Lab Synthet & Nat Funct Mol Chem, Minist Educ, Coll Chem & Mat Sci, Xian 710069, Peoples R China

[3] Shaanxi Joint Lab Graphene NWU, Xian 710127, Shaanxi, Peoples R China

关键词: Nickel phosphide;    Carbon shell;    Submicrospheres;    Lithium-ion battery;    Sodium-ion battery;   

DOI  :  10.1016/j.jcis.2018.11.093

来源: Elsevier

【 摘 要 】

A hybrid based on nickel phosphide nanoparticle assembled submicrospheres coated with a glucose-derived carbon shell is synthesized from Ni-glycerate precursors through a carbon coating route and a subsequent calcination-phosphatization approach. Characterization results indicate that the synthesized submicrospheres have a diameter of similar to 500 nm and are composed of nanoparticles as subunits with sizes ranging from 30 to 40 nm. Each sphere and its subunits are coated by a continuous carbon coating shell. The electrochemical performance of the material as an anode for reversible energy storage is investigated and evaluated. A comparative study of the lithium/sodium storage properties between the hybrid and pure nickel phosphide is carried out. The electrochemical results demonstrate that the hybrid fabricated electrode is a highly attractive anode for lithium- and sodium-ion batteries, exhibiting much better lithium/sodium storage properties compared to the nickel phosphide submicrospheres of the same construction. The reasons for the enhanced energy storage performance of the submicrospheres are explored by a series of comparison experiments based on morphology, structure, electrical conductivity, and kinetic property. (C) 2018 Elsevier Inc. All rights reserved.

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