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Effects of Graphene Nanosheets with Different Lateral Sizes as Conductive Additives on the Electrochemical Performance of LiNi(0.5)Co(0.2)Mn(0.3)O(2) Cathode Materials for Li Ion Batteries

In this study, we focus on lateral size effects of graphene nanosheets as conductive additives for LiNi(0.5)Co(0.2)Mn(0.3)O(2) (NCM) cathode materials for Li-ion batteries. We used two different lateral sizes of graphene, 13 (GN-13) and 28 µm (GN-28). It can be found that the larger sheet sizes of g...

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Autores principales: Hsu, Ting-Hao, Liu, Wei-Ren
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7285127/
https://www.ncbi.nlm.nih.gov/pubmed/32438590
http://dx.doi.org/10.3390/polym12051162
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author Hsu, Ting-Hao
Liu, Wei-Ren
author_facet Hsu, Ting-Hao
Liu, Wei-Ren
author_sort Hsu, Ting-Hao
collection PubMed
description In this study, we focus on lateral size effects of graphene nanosheets as conductive additives for LiNi(0.5)Co(0.2)Mn(0.3)O(2) (NCM) cathode materials for Li-ion batteries. We used two different lateral sizes of graphene, 13 (GN-13) and 28 µm (GN-28). It can be found that the larger sheet sizes of graphene nanosheets give a poorer rate capability. The electrochemical measurements indicate that GN-13 delivers an average capacity of 189.8 mAh/g at 0.1 C and 114.2 mAh/g at 2 C and GN-28 exhibits an average capacity of 179.4 mAh/g at 0.1 C and only 6 mAh/g at 2 C. Moreover, according to the results of alternating current (AC) impedance, it can be found that the GN-28 sample has much higher resistance than that of GN-13. The reason might be attributed to that GN-28 has a longer diffusion distance of ion transfer and the mismatch of particle size between NCM and GN-28. The corresponding characterization might provide important reference for Li-ion battery applications.
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spelling pubmed-72851272020-06-18 Effects of Graphene Nanosheets with Different Lateral Sizes as Conductive Additives on the Electrochemical Performance of LiNi(0.5)Co(0.2)Mn(0.3)O(2) Cathode Materials for Li Ion Batteries Hsu, Ting-Hao Liu, Wei-Ren Polymers (Basel) Article In this study, we focus on lateral size effects of graphene nanosheets as conductive additives for LiNi(0.5)Co(0.2)Mn(0.3)O(2) (NCM) cathode materials for Li-ion batteries. We used two different lateral sizes of graphene, 13 (GN-13) and 28 µm (GN-28). It can be found that the larger sheet sizes of graphene nanosheets give a poorer rate capability. The electrochemical measurements indicate that GN-13 delivers an average capacity of 189.8 mAh/g at 0.1 C and 114.2 mAh/g at 2 C and GN-28 exhibits an average capacity of 179.4 mAh/g at 0.1 C and only 6 mAh/g at 2 C. Moreover, according to the results of alternating current (AC) impedance, it can be found that the GN-28 sample has much higher resistance than that of GN-13. The reason might be attributed to that GN-28 has a longer diffusion distance of ion transfer and the mismatch of particle size between NCM and GN-28. The corresponding characterization might provide important reference for Li-ion battery applications. MDPI 2020-05-19 /pmc/articles/PMC7285127/ /pubmed/32438590 http://dx.doi.org/10.3390/polym12051162 Text en © 2020 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
Hsu, Ting-Hao
Liu, Wei-Ren
Effects of Graphene Nanosheets with Different Lateral Sizes as Conductive Additives on the Electrochemical Performance of LiNi(0.5)Co(0.2)Mn(0.3)O(2) Cathode Materials for Li Ion Batteries
title Effects of Graphene Nanosheets with Different Lateral Sizes as Conductive Additives on the Electrochemical Performance of LiNi(0.5)Co(0.2)Mn(0.3)O(2) Cathode Materials for Li Ion Batteries
title_full Effects of Graphene Nanosheets with Different Lateral Sizes as Conductive Additives on the Electrochemical Performance of LiNi(0.5)Co(0.2)Mn(0.3)O(2) Cathode Materials for Li Ion Batteries
title_fullStr Effects of Graphene Nanosheets with Different Lateral Sizes as Conductive Additives on the Electrochemical Performance of LiNi(0.5)Co(0.2)Mn(0.3)O(2) Cathode Materials for Li Ion Batteries
title_full_unstemmed Effects of Graphene Nanosheets with Different Lateral Sizes as Conductive Additives on the Electrochemical Performance of LiNi(0.5)Co(0.2)Mn(0.3)O(2) Cathode Materials for Li Ion Batteries
title_short Effects of Graphene Nanosheets with Different Lateral Sizes as Conductive Additives on the Electrochemical Performance of LiNi(0.5)Co(0.2)Mn(0.3)O(2) Cathode Materials for Li Ion Batteries
title_sort effects of graphene nanosheets with different lateral sizes as conductive additives on the electrochemical performance of lini(0.5)co(0.2)mn(0.3)o(2) cathode materials for li ion batteries
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7285127/
https://www.ncbi.nlm.nih.gov/pubmed/32438590
http://dx.doi.org/10.3390/polym12051162
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