A robust, modular approach to produce graphene-MO X multilayer foams as electrodes for Li-ion batteries
Journal article, 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.

Author

Massimo Gazzano

Chalmers, Industrial and Materials Science

Zhenyuan Xia

Istituto per la Sintesi Organica e la Fotoreattività

Chalmers, Industrial and Materials Science

Meganne Christian

Consiglo Nazionale Delle Richerche

Catia Arbizzani

University of Bologna

V. Morandi

Consiglo Nazionale Delle Richerche

Vanesa Quintano

Chalmers, Industrial and Materials Science

Alessandro Kovtun

Chalmers, Industrial and Materials Science

Vincenzo Palermo

Istituto per la Sintesi Organica e la Fotoreattività

Chalmers, Industrial and Materials Science, Materials and manufacture

Nanoscale

2040-3364 (ISSN)

Vol. 11 12 5265-5273

Subject Categories

Physical Chemistry

Textile, Rubber and Polymeric Materials

Materials Chemistry

Composite Science and Engineering

Condensed Matter Physics

Areas of Advance

Materials Science

DOI

10.1039/c8nr09195a

PubMed

30843016

More information

Latest update

6/11/2019