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Hierarchical porous LiNi 1/3 Co 1/3 Mn 1/3 O 2 Nano-/Micro spherical cathode material: Minimized cation mixing and improved li + mobility for enhanced electrochemical performance
Chen Z.; Wang J.; Chao D.; Baikie T.; Bai L.; Chen S.; Zhao Y.; Sum T.C.; Lin J.; Shen Z.
2016-05-17
Source PublicationScientific Reports
ISSN20452322
Volume6
AbstractAlthough being considered as one of the most promising cathode materials for Lithium-ion batteries (LIBs), LiNi Co Mn O (NCM) is currently limited by its poor rate performance and cycle stability resulting from the thermodynamically favorable Li /Ni cation mixing which depresses the Li + mobility. In this study, we developed a two-step method using fluffy MnO 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.
DOI10.1038/srep25771
URLView the original
Language英語
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Cited Times [WOS]:77   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
AffiliationNanyang Technological University
Recommended Citation
GB/T 7714
Chen Z.,Wang J.,Chao D.,et al. Hierarchical porous LiNi 1/3 Co 1/3 Mn 1/3 O 2 Nano-/Micro spherical cathode material: Minimized cation mixing and improved li + mobility for enhanced electrochemical performance[J]. Scientific Reports,2016,6.
APA Chen Z..,Wang J..,Chao D..,Baikie T..,Bai L..,...&Shen Z..(2016).Hierarchical porous LiNi 1/3 Co 1/3 Mn 1/3 O 2 Nano-/Micro spherical cathode material: Minimized cation mixing and improved li + mobility for enhanced electrochemical performance.Scientific Reports,6.
MLA Chen Z.,et al."Hierarchical porous LiNi 1/3 Co 1/3 Mn 1/3 O 2 Nano-/Micro spherical cathode material: Minimized cation mixing and improved li + mobility for enhanced electrochemical performance".Scientific Reports 6(2016).
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