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LiFePO(4)-Graphene Composites as High-Performance Cathodes for Lithium-Ion Batteries: The Impact of Size and Morphology of Graphene

In this work, we investigated three types of graphene (i.e., home-made G, G V4, and G V20) with different size and morphology, as additives to a lithium iron phosphate (LFP) cathode for the lithium-ion battery. Both the LFP and the two types of graphene (G V4 and G V20) were sourced from industrial,...

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Autores principales: Fu, Yanqing, Wei, Qiliang, Zhang, Gaixia, Zhong, Yu, Moghimian, Nima, Tong, Xin, Sun, Shuhui
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6471634/
https://www.ncbi.nlm.nih.gov/pubmed/30871139
http://dx.doi.org/10.3390/ma12060842
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author Fu, Yanqing
Wei, Qiliang
Zhang, Gaixia
Zhong, Yu
Moghimian, Nima
Tong, Xin
Sun, Shuhui
author_facet Fu, Yanqing
Wei, Qiliang
Zhang, Gaixia
Zhong, Yu
Moghimian, Nima
Tong, Xin
Sun, Shuhui
author_sort Fu, Yanqing
collection PubMed
description In this work, we investigated three types of graphene (i.e., home-made G, G V4, and G V20) with different size and morphology, as additives to a lithium iron phosphate (LFP) cathode for the lithium-ion battery. Both the LFP and the two types of graphene (G V4 and G V20) were sourced from industrial, large-volume manufacturers, enabling cathode production at low cost. The use of wrinkled and/or large pieces of a graphene matrix shows promising electrochemical performance when used as an additive to the LFP, which indicates that the features of large and curved graphene pieces enable construction of a more effective conducting network to realize the full potential of the active materials. Specifically, compared to pristine LFP, the LFP/G, LFP/G V20, and LFP/G V4 show up to a 9.2%, 6.9%, and 4.6% increase, respectively, in a capacity at 1 C. Furthermore, the LFP combined with graphene exhibits a better rate performance than tested with two different charge/discharge modes. Moreover, from the economic and electrochemical performance view point, we also demonstrated that 1% of graphene content is optimized no matter the capacity calculated, based on the LFP/graphene composite or pure LFP.
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spelling pubmed-64716342019-04-27 LiFePO(4)-Graphene Composites as High-Performance Cathodes for Lithium-Ion Batteries: The Impact of Size and Morphology of Graphene Fu, Yanqing Wei, Qiliang Zhang, Gaixia Zhong, Yu Moghimian, Nima Tong, Xin Sun, Shuhui Materials (Basel) Article In this work, we investigated three types of graphene (i.e., home-made G, G V4, and G V20) with different size and morphology, as additives to a lithium iron phosphate (LFP) cathode for the lithium-ion battery. Both the LFP and the two types of graphene (G V4 and G V20) were sourced from industrial, large-volume manufacturers, enabling cathode production at low cost. The use of wrinkled and/or large pieces of a graphene matrix shows promising electrochemical performance when used as an additive to the LFP, which indicates that the features of large and curved graphene pieces enable construction of a more effective conducting network to realize the full potential of the active materials. Specifically, compared to pristine LFP, the LFP/G, LFP/G V20, and LFP/G V4 show up to a 9.2%, 6.9%, and 4.6% increase, respectively, in a capacity at 1 C. Furthermore, the LFP combined with graphene exhibits a better rate performance than tested with two different charge/discharge modes. Moreover, from the economic and electrochemical performance view point, we also demonstrated that 1% of graphene content is optimized no matter the capacity calculated, based on the LFP/graphene composite or pure LFP. MDPI 2019-03-13 /pmc/articles/PMC6471634/ /pubmed/30871139 http://dx.doi.org/10.3390/ma12060842 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Fu, Yanqing
Wei, Qiliang
Zhang, Gaixia
Zhong, Yu
Moghimian, Nima
Tong, Xin
Sun, Shuhui
LiFePO(4)-Graphene Composites as High-Performance Cathodes for Lithium-Ion Batteries: The Impact of Size and Morphology of Graphene
title LiFePO(4)-Graphene Composites as High-Performance Cathodes for Lithium-Ion Batteries: The Impact of Size and Morphology of Graphene
title_full LiFePO(4)-Graphene Composites as High-Performance Cathodes for Lithium-Ion Batteries: The Impact of Size and Morphology of Graphene
title_fullStr LiFePO(4)-Graphene Composites as High-Performance Cathodes for Lithium-Ion Batteries: The Impact of Size and Morphology of Graphene
title_full_unstemmed LiFePO(4)-Graphene Composites as High-Performance Cathodes for Lithium-Ion Batteries: The Impact of Size and Morphology of Graphene
title_short LiFePO(4)-Graphene Composites as High-Performance Cathodes for Lithium-Ion Batteries: The Impact of Size and Morphology of Graphene
title_sort lifepo(4)-graphene composites as high-performance cathodes for lithium-ion batteries: the impact of size and morphology of graphene
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6471634/
https://www.ncbi.nlm.nih.gov/pubmed/30871139
http://dx.doi.org/10.3390/ma12060842
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