Hierarchical Porous LiNi1/3Co1/3Mn1/3O2 nano-/micro spherical cathode material : minimized cation mixing and improved Li+ mobility for enhanced electrochemical performance

Although being considered as one of the most promising cathode materials for Lithium-ion batteries (LIBs), LiNi1/3Co1/3Mn1/3O2 (NCM) is currently limited by its poor rate performance and cycle stability resulting from the thermodynamically favorable Li+/Ni2+ cation mixing which depresses the Li+ mob...

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Main Authors: Chen, Zhen, Wang, Jin, Chao, Dongliang, Baikie, Tom, Bai, Linyi, Chen, Shi, Zhao, Yanli, Sum, Tze Chien, Lin, Jianyi, Shen, Zexiang
Other Authors: School of Materials Science & Engineering
Format: Article
Language:English
Published: 2018
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Online Access:https://hdl.handle.net/10356/85251
http://hdl.handle.net/10220/46675
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-852512022-02-16T16:30:58Z Hierarchical Porous LiNi1/3Co1/3Mn1/3O2 nano-/micro spherical cathode material : minimized cation mixing and improved Li+ mobility for enhanced electrochemical performance Chen, Zhen Wang, Jin Chao, Dongliang Baikie, Tom Bai, Linyi Chen, Shi Zhao, Yanli Sum, Tze Chien Lin, Jianyi Shen, Zexiang School of Materials Science & Engineering School of Physical and Mathematical Sciences Interdisciplinary Graduate School (IGS) Energy Research Institute @ NTU (ERI@N) DRNTU::Engineering::Materials::Energy materials Lithium-ion Batteries Cathode Material Although being considered as one of the most promising cathode materials for Lithium-ion batteries (LIBs), LiNi1/3Co1/3Mn1/3O2 (NCM) is currently limited by its poor rate performance and cycle stability resulting from the thermodynamically favorable Li+/Ni2+ cation mixing which depresses the Li+ mobility. In this study, we developed a two-step method using fluffy MnO2 as template to prepare hierarchical porous nano-/microsphere NCM (PNM-NCM). Specifically, PNM-NCM microspheres achieves a high reversible specific capacity of 207.7 mAh g−1 at 0.1 C with excellent rate capability (163.6 and 148.9 mAh g−1 at 1 C and 2 C), and the reversible capacity retention can be well-maintained as high as 90.3% after 50 cycles. This excellent electrochemical performance is attributed to unique hierarchical porous nano-/microsphere structure which can increase the contact area with electrolyte, shorten Li+ diffusion path and thus improve the Li+ mobility. Moreover, as revealed by XRD Rietveld refinement analysis, a negligible cation mixing (1.9%) and high crystallinity with a well-formed layered structure also contribute to the enhanced C-rates performance and cycle stability. On the basis of our study, an effective strategy can be established to reveal the fundamental relationship between the structure/chemistry of these materials and their properties. Published version 2018-11-21T06:04:35Z 2019-12-06T16:00:26Z 2018-11-21T06:04:35Z 2019-12-06T16:00:26Z 2016 Journal Article Chen, Z., Wang, J., Chao, D., Baikie, T., Bai, L., Chen, S., . . . Shen, Z. (2016). Hierarchical porous LiNi1/3Co1/3Mn1/3O2 nano-/micro spherical cathode material : minimized cation mixing and improved Li+ mobility for enhanced electrochemical performance. Scientific Reports, 6, 25771-. doi:10.1038/srep25771 https://hdl.handle.net/10356/85251 http://hdl.handle.net/10220/46675 10.1038/srep25771 27185646 en Scientific Reports © 2016 The Authors (Nature Publishing Group). This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ 10 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering::Materials::Energy materials
Lithium-ion Batteries
Cathode Material
spellingShingle DRNTU::Engineering::Materials::Energy materials
Lithium-ion Batteries
Cathode Material
Chen, Zhen
Wang, Jin
Chao, Dongliang
Baikie, Tom
Bai, Linyi
Chen, Shi
Zhao, Yanli
Sum, Tze Chien
Lin, Jianyi
Shen, Zexiang
Hierarchical Porous LiNi1/3Co1/3Mn1/3O2 nano-/micro spherical cathode material : minimized cation mixing and improved Li+ mobility for enhanced electrochemical performance
description Although being considered as one of the most promising cathode materials for Lithium-ion batteries (LIBs), LiNi1/3Co1/3Mn1/3O2 (NCM) is currently limited by its poor rate performance and cycle stability resulting from the thermodynamically favorable Li+/Ni2+ cation mixing which depresses the Li+ mobility. In this study, we developed a two-step method using fluffy MnO2 as template to prepare hierarchical porous nano-/microsphere NCM (PNM-NCM). Specifically, PNM-NCM microspheres achieves a high reversible specific capacity of 207.7 mAh g−1 at 0.1 C with excellent rate capability (163.6 and 148.9 mAh g−1 at 1 C and 2 C), and the reversible capacity retention can be well-maintained as high as 90.3% after 50 cycles. This excellent electrochemical performance is attributed to unique hierarchical porous nano-/microsphere structure which can increase the contact area with electrolyte, shorten Li+ diffusion path and thus improve the Li+ mobility. Moreover, as revealed by XRD Rietveld refinement analysis, a negligible cation mixing (1.9%) and high crystallinity with a well-formed layered structure also contribute to the enhanced C-rates performance and cycle stability. On the basis of our study, an effective strategy can be established to reveal the fundamental relationship between the structure/chemistry of these materials and their properties.
author2 School of Materials Science & Engineering
author_facet School of Materials Science & Engineering
Chen, Zhen
Wang, Jin
Chao, Dongliang
Baikie, Tom
Bai, Linyi
Chen, Shi
Zhao, Yanli
Sum, Tze Chien
Lin, Jianyi
Shen, Zexiang
format Article
author Chen, Zhen
Wang, Jin
Chao, Dongliang
Baikie, Tom
Bai, Linyi
Chen, Shi
Zhao, Yanli
Sum, Tze Chien
Lin, Jianyi
Shen, Zexiang
author_sort Chen, Zhen
title Hierarchical Porous LiNi1/3Co1/3Mn1/3O2 nano-/micro spherical cathode material : minimized cation mixing and improved Li+ mobility for enhanced electrochemical performance
title_short Hierarchical Porous LiNi1/3Co1/3Mn1/3O2 nano-/micro spherical cathode material : minimized cation mixing and improved Li+ mobility for enhanced electrochemical performance
title_full Hierarchical Porous LiNi1/3Co1/3Mn1/3O2 nano-/micro spherical cathode material : minimized cation mixing and improved Li+ mobility for enhanced electrochemical performance
title_fullStr Hierarchical Porous LiNi1/3Co1/3Mn1/3O2 nano-/micro spherical cathode material : minimized cation mixing and improved Li+ mobility for enhanced electrochemical performance
title_full_unstemmed Hierarchical Porous LiNi1/3Co1/3Mn1/3O2 nano-/micro spherical cathode material : minimized cation mixing and improved Li+ mobility for enhanced electrochemical performance
title_sort hierarchical porous lini1/3co1/3mn1/3o2 nano-/micro spherical cathode material : minimized cation mixing and improved li+ mobility for enhanced electrochemical performance
publishDate 2018
url https://hdl.handle.net/10356/85251
http://hdl.handle.net/10220/46675
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