A robust, modular approach to produce graphene-MO X multilayer foams as electrodes for Li-ion batteries
Artikel i vetenskaplig tidskrift, 2019

Major breakthroughs in batteries would require the development of new composite electrode materials, with a precisely controlled nanoscale architecture. However, composites used for energy storage are typically a disordered bulk mixture of different materials, or simple coatings of one material onto another. We demonstrate here a new technique to create complex hierarchical electrodes made of multilayers of vertically aligned nanowalls of hematite (Fe 2 O 3 ) alternated with horizontal spacers of reduced graphene oxide (RGO), all deposited on a 3D, conductive graphene foam. The RGO nanosheets act as porous spacers, current collectors and protection against delamination of the hematite. The multilayer composite, formed by up to 7 different layers, can be used with no further processing as an anode in Li-ion batteries, with a specific capacity of up to 1175 μA h cm -2 and a capacity retention of 84% after 1000 cycles. Our coating strategy gives improved cyclability and rate capacity compared to conventional bulk materials. Our production method is ideally suited to assemble an arbitrary number of organic-inorganic materials in an arbitrary number of layers.

Författare

Massimo Gazzano

Chalmers, Industri- och materialvetenskap

Zhenyuan Xia

Istituto Per La Sintesi Organica E La Fotoreattivita, Bologna

Chalmers, Industri- och materialvetenskap

Meganne Christian

Consiglo Nazionale Delle Richerche

Catia Arbizzani

Universita di Bologna

V. Morandi

Consiglo Nazionale Delle Richerche

Vanesa Quintano

Chalmers, Industri- och materialvetenskap

Alessandro Kovtun

Chalmers, Industri- och materialvetenskap

Vincenzo Palermo

Istituto Per La Sintesi Organica E La Fotoreattivita, Bologna

Chalmers, Industri- och materialvetenskap, Material och tillverkning

Nanoscale

2040-3364 (ISSN)

Vol. 11 12 5265-5273

Ämneskategorier

Fysikalisk kemi

Textil-, gummi- och polymermaterial

Materialkemi

Kompositmaterial och -teknik

Den kondenserade materiens fysik

Styrkeområden

Materialvetenskap

DOI

10.1039/c8nr09195a

PubMed

30843016

Mer information

Senast uppdaterat

2019-06-11