Title

In-Situ Reduction Derived Nitrogen Doped Carbon Anchored Cobalt Nanoparticles as Highly Capacity and Long Life Lithium Ion Battery Anodes

Document Type

Article

Publication Date

12-1-2018

Publication Title

Journal of Materials Science: Materials in Electronics

DOI

10.1007/s10854-018-0123-9

ISSN

1573-482X

Abstract

A novel composite with embedded cobalt nanoparticles in nitrogen doped carbon (Co@NDC) is synthesized by the in-situ reduction of Co(OH)2 using ionic liquid [HMIm]N(CN)2 as carbon precursor. Due to the special structure, this composite can form more stable solid electrolyte interface (SEI) film than cobalt nanoparticles when used as anode. The Co@NDC electrode shows a high discharge capacity of 1322 mAh g−1 after 850 cycles at 0.5 C, and an extremely long cycle life (436 mAh g−1 after 2400 cycles at 5 C). This excellent electrochemical performance can be attributed to the catalytic lithium-carbon reaction of cobalt nanoparticles, high conductivity of the carbon material, and the thin and stable SEI film.

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