Journal
ELECTROCHIMICA ACTA
Volume 205, Issue -, Pages 85-94Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2016.04.095
Keywords
Graphene; Mesoporous silica; Mesoporous metal oxide; Lithium-ion battery
Categories
Funding
- Fundamental Research Funds for the Central Universities
- National Natural Science Foundation of China [21273022, 21573023]
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As potential anode materials for lithium-ion batteries, mesoporous metal oxides show high reversible capacities but relatively poor cycle stability due to the structural collapse during cycles. Graphene-encapsulated mesoporous metal oxides may increase the electronic conductivity of the composite as well as stabilize the mesostructure of metal oxides, thereby enhancing the electrochemical performance of mesoporous metal oxides. Herein we describe a novel strategy for the preparation of graphene-encapsulated mesoporous metal oxides (SnO2, Mn3O4), which exhibit superior electrochemical performance compared to pure mesoporous metal oxides. Moreover, some mesoporous metal oxides may be further reduced to low-valence metal oxides when calcined in presence of graphene. Mesoporous metal oxides with high isoelectric points are not essential for this synthesis method since metal oxides are connected with graphene through mesoporous silica template, thus expanding the types of graphene-encapsulated mesoporous metal oxides. (C) 2016 Elsevier Ltd. All rights reserved.
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