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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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 |
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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 |
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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. |
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School of Materials Science & Engineering |
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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 |
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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 |
_version_ |
1725985753422364672 |