Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/85251
Title: Hierarchical Porous LiNi1/3Co1/3Mn1/3O2 nano-/micro spherical cathode material : minimized cation mixing and improved Li+ mobility for enhanced electrochemical performance
Authors: Chen, Zhen
Wang, Jin
Chao, Dongliang
Baikie, Tom
Bai, Linyi
Chen, Shi
Zhao, Yanli
Sum, Tze Chien
Lin, Jianyi
Shen, Zexiang
Keywords: DRNTU::Engineering::Materials::Energy materials
Lithium-ion Batteries
Cathode Material
Issue Date: 2016
Source: 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
Series/Report no.: Scientific Reports
Abstract: 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.
URI: https://hdl.handle.net/10356/85251
http://hdl.handle.net/10220/46675
DOI: 10.1038/srep25771
Rights: © 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/
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:ERI@N Journal Articles

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