Complementary stabilization by core/sheath carbon nanofibers/spongy carbon on submicron tin oxide particles as anode for lithium-ion batteries

Ji, Hongmei, Ma, Chao, Ding, Jingjing, Yang, Jie, Yang, Gang, Chao, Yimin and Yang, Yang (2019) Complementary stabilization by core/sheath carbon nanofibers/spongy carbon on submicron tin oxide particles as anode for lithium-ion batteries. Journal of Power Sources, 413. pp. 42-49. ISSN 0378-7753

[img] PDF (Accepted_Manuscript) - Submitted Version
Restricted to Repository staff only until 14 December 2019.

Download (3313kB) | Request a copy

    Abstract

    To limit the pulverization of tin-based anode materials during lithiation/delithiation, submicron tin oxide/tin particles are fixed on core/sheath carbon nanofiber/spongy carbon via hydrothermal and carbothermal reduction treatment in this work. During carbothermal reduction, SnO2 nanosheets are converted to spherical Sn submicron particles and simultaneously the hollow spongy carbon is produced and still enwrap on carbon nanofiber. The as-produced flexible film is used for a binder-free anode for lithium ion batteries, without the polymer binder and conductive carbon. At 0.1, 0.5, 1 and 2 A g-1, the composite electrode respectively displays a discharging capacity of 1393.0, 738.2, 583.6 and 382.6 mAh g-1. Moreover, it delivers specific capacity of 726.9 mAh g-1 and coulombic efficiency of 99.45 % after 300 cycles at 0.1 A g-1. The comparison sample of carbon nanofiber/SnOx film without the presence of spongy carbon displays much lower rate performance and worse cyclic performance. The integrated structure of carbon nanofiber/SnOx/spongy carbon results in the remarkable Li-storage performance, in which the carbon nanofiber and spongy carbon synergistically provide conductive channel and buffer zone to hinder the pulverization and peeling of SnOx particles during charging-discharging processes.

    Item Type: Article
    Uncontrolled Keywords: hybrid materials,integrated structure,cyclic performance,charge transport,structure-property relationships
    Faculty \ School: Faculty of Science > School of Chemistry
    Related URLs:
    Depositing User: LivePure Connector
    Date Deposited: 10 Jan 2019 12:30
    Last Modified: 09 Apr 2019 14:02
    URI: https://ueaeprints.uea.ac.uk/id/eprint/69530
    DOI: 10.1016/j.jpowsour.2018.12.022

    Actions (login required)

    View Item