Free-Standing 3D-Sponged Nanofiber Electrodes for Ultrahigh-Rate Energy-Storage Devices
Artikel i vetenskaplig tidskrift, 2018

We have designed a self-standing anode built-up from highly conductive 3D-sponged nanofibers, that is, with no current collectors, binders, or additional conductive agents. The small diameter of the fibers combined with an internal spongelike porosity results in short distances for lithium-ion diffusion and 3D pathways that facilitate the electronic conduction. Moreover, functional groups at the fiber surfaces lead to the formation of a stable solid-electrolyte interphase. We demonstrate that this anode enables the operation of Li-cells at specific currents as high as 20 A g-1 (approx. 50C) with excellent cycling stability and an energy density which is >50% higher than what is obtained with a commercial graphite anode.

high gravimetric energy density

fast-charging Li-batteries anode

Li-ion batteries

free-standing electrode materials

3D-sponged nanofibers electrode

Författare

Marco Agostini

Chalmers, Fysik, Kondenserade materiens fysik

Du Hyun Lim

Chalmers, Fysik, Kondenserade materiens fysik

Sergio Brutti

Istituto Dei Sistemi Complessi, Rome

Niklas Lindahl

Chalmers, Fysik, Kondenserade materiens fysik

J. Ahn

Gyeongsang National University

Bruno Scrosati

Helmholtz-Institut Ulm (HIU)

Aleksandar Matic

Chalmers, Fysik, Kondenserade materiens fysik

ACS Applied Materials & Interfaces

1944-8244 (ISSN) 1944-8252 (eISSN)

Vol. 10 40 34140-34146

Ämneskategorier

Oorganisk kemi

Materialkemi

Annan kemiteknik

DOI

10.1021/acsami.8b09746

PubMed

30152688

Mer information

Senast uppdaterat

2018-11-05