Controllable Preparation of V2O5/Graphene Nanocomposites as Cathode Materials for Lithium-Ion Batteries

Controllable Preparation of V2O5/Graphene Nanocomposites as Cathode Materials for Lithium-Ion Batteries

Transition metal oxides and graphene composites have been widely reported in energy storage and conversion systems. However, the controllable synthesis of graphene-based nanocomposites with tunable morphologies is far less reported. In this work, we report the fabrication of V2O5 and reduced graphen...

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Main Authors: Liu, Yanglin, Wang, Yaping, Zhang, Yifang, Liang, Shuquan, Pan, Anqiang
Format: Online
Language:English
Published: Springer US 2016
Online Access:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5153389/
id pubmed-5153389
recordtype oai_dc
spelling pubmed-51533892016-12-27 Controllable Preparation of V2O5/Graphene Nanocomposites as Cathode Materials for Lithium-Ion Batteries Liu, Yanglin Wang, Yaping Zhang, Yifang Liang, Shuquan Pan, Anqiang Nano Express Transition metal oxides and graphene composites have been widely reported in energy storage and conversion systems. However, the controllable synthesis of graphene-based nanocomposites with tunable morphologies is far less reported. In this work, we report the fabrication of V2O5 and reduced graphene oxide composites with nanosheet or nanoparticle-assembled subunits by adjusting the solvothermal solution. As cathode materials for lithium-ion batteries, the nanosheet-assembled V2O5/graphene composite exhibits better rate capability and long-term cycling stability. The V2O5/graphene composites can deliver discharge capacities of 133, 131, and 122 mAh g−1 at 16 C, 32 C, and 64 C, respectively, in the voltage range of 2.5–4.0 V vs. Li/Li+. Moreover, the electrodes can retain 85% of their original capacity at 1C rate after 500 cycles. The superior electrochemical performances are attributed to the porous structures created by the connected V2O5 nanosheets and the electron conductivity improvement by graphene. Springer US 2016-12-12 /pmc/articles/PMC5153389/ /pubmed/27957728 http://dx.doi.org/10.1186/s11671-016-1764-3 Text en © The Author(s). 2016 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
repository_type Open Access Journal
institution_category Foreign Institution
institution US National Center for Biotechnology Information
building NCBI PubMed
collection Online Access
language English
format Online
author Liu, Yanglin
Wang, Yaping
Zhang, Yifang
Liang, Shuquan
Pan, Anqiang
spellingShingle Liu, Yanglin
Wang, Yaping
Zhang, Yifang
Liang, Shuquan
Pan, Anqiang
Controllable Preparation of V2O5/Graphene Nanocomposites as Cathode Materials for Lithium-Ion Batteries
author_facet Liu, Yanglin
Wang, Yaping
Zhang, Yifang
Liang, Shuquan
Pan, Anqiang
author_sort Liu, Yanglin
title Controllable Preparation of V2O5/Graphene Nanocomposites as Cathode Materials for Lithium-Ion Batteries
title_short Controllable Preparation of V2O5/Graphene Nanocomposites as Cathode Materials for Lithium-Ion Batteries
title_full Controllable Preparation of V2O5/Graphene Nanocomposites as Cathode Materials for Lithium-Ion Batteries
title_fullStr Controllable Preparation of V2O5/Graphene Nanocomposites as Cathode Materials for Lithium-Ion Batteries
title_full_unstemmed Controllable Preparation of V2O5/Graphene Nanocomposites as Cathode Materials for Lithium-Ion Batteries
title_sort controllable preparation of v2o5/graphene nanocomposites as cathode materials for lithium-ion batteries
description Transition metal oxides and graphene composites have been widely reported in energy storage and conversion systems. However, the controllable synthesis of graphene-based nanocomposites with tunable morphologies is far less reported. In this work, we report the fabrication of V2O5 and reduced graphene oxide composites with nanosheet or nanoparticle-assembled subunits by adjusting the solvothermal solution. As cathode materials for lithium-ion batteries, the nanosheet-assembled V2O5/graphene composite exhibits better rate capability and long-term cycling stability. The V2O5/graphene composites can deliver discharge capacities of 133, 131, and 122 mAh g−1 at 16 C, 32 C, and 64 C, respectively, in the voltage range of 2.5–4.0 V vs. Li/Li+. Moreover, the electrodes can retain 85% of their original capacity at 1C rate after 500 cycles. The superior electrochemical performances are attributed to the porous structures created by the connected V2O5 nanosheets and the electron conductivity improvement by graphene.
publisher Springer US
publishDate 2016
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5153389/
_version_ 1613777212758032384

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