Electrochemically exfoliated graphene oxide/iron oxide composite foams for lithium storage, produced by simultaneous graphene reduction and Fe(OH)3 condensation

被引：41

作者：

Xia, Zhen Yuan ^{[1
]}

Wei, Di ^{[2
]}

Anitowska, Elzbieta ^{[1
]}

Bellani, Vittorio ^{[3
,4
]}

Ortolani, Luca ^{[5
]}

Morandi, Vittorio ^{[5
]}

Gazzano, Massimo ^{[1
]}

Zanelli, Alberto ^{[1
]}

Borini, Stefano ^{[2
]}

Palermo, Vincenzo ^{[1
]}

机构：

[1] CNR, Ist Sintesi Organ & Fotoreattiv, I-40129 Bologna, Italy

[2] Nokia R&D UK Ltd, Cambridge CB3 0FA, England

[3] Univ Pavia, Dipartimento Fis, I-27100 Pavia, Italy

[4] Univ Pavia, CNISM, I-27100 Pavia, Italy

[5] CNR, Ist Microelettron & Microsisterni, I-40129 Bologna, Italy

来源：

CARBON | 2015年 / 84卷

关键词：

PERFORMANCE ANODE MATERIAL; ION BATTERIES; SUPERCAPACITOR APPLICATIONS; ALPHA-FE2O3; NETWORKS; INTERCALATION; ELECTRODES; FRAMEWORKS; HYDROGELS; GRAPHITE;

D O I：

10.1016/j.carbon.2014.12.007

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We describe the production of graphene-based composites for energy storage, obtained by a combination of electrochemical and solution processing techniques. Electrochemically exfoliated graphene oxide sheets (EGO) are produced using an original setup that allows fast expansion of graphite flakes and efficient exfoliation of expanded graphite via an electrochemical route. The sheets are deposited on a sacrificial nickel foam together with an iron hydroxide colloidal precursor. Calcination treatment simultaneously renders the EGO foam conductive and transforms Fe(OH)(3) into hematite (alpha-Fe2O3), yielding a nanoporous Fe2O3 layer on the surface of the mesoporous EGO foam, creating an ideal structure for lithium storage. The obtained graphene/metal oxide hybrid is a continuous, electrically conductive three-dimensional (3D) composite featuring a hierarchical meso-nano porous structure. A systematic study of these composites, varying the Fe2O3:EGO ratio, is then performed to maximize their performance as nanostructured electrodes in standard coin cell batteries. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：254 / 262

页数：9

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