Insight into the improved cycling stability of sphere-nanorod-like micro-nanostructured high voltage spinel cathode for lithium-ion batteries

Simple item page
dc.contributor.authorLiu, H.
dc.contributor.authorLiang, G.
dc.contributor.authorGao, C.
dc.contributor.authorBi, S.
dc.contributor.authorChen, Q.
dc.contributor.authorXie, Y.
dc.contributor.authorFan, S.
dc.contributor.authorCao, L.
dc.contributor.authorPang, W.K.
dc.contributor.authorGuo, Z.
dc.date.issued2019
dc.description.abstractCurrently, developing cathode material with high energy density and good cycling performance is one of the key challenges for lithium-ion batteries. LiNi<inf>0.5-x</inf>Mn<inf>1.5+x</inf>O<inf>4</inf> (LNMO) spinel cathode has attracted great attention as the most promising cathode candidate due to its extraordinarily high operating voltage, but its inferior long-term cycling stability has limited its further development. In this work, we successfully designed LNMOs with specific facets and different morphologies, among which the hybrid sphere-nanorod-like micro-nanostructured LNMO possesses excellent cycling performance, with capacity of over 107.8 mAh g<sup>−1</sup> after 1000 cycles at 10 C and superior rate capability up to 10 C. Its superior rate capability is found to originate from the large Li-O bond length by Rietveld refinement, which contributes to decreased charge transfer resistance and ease of Li insertion/extraction at tetrahedral sites. On the other hand, the excellent cycling stability comes from its having the least structural deformation from mechanistic reactions, which involve the longest solid-solution reaction, the highest spinel structural tolerance/stability up to Δ = ~0.69 Li, and a highly reversible two-phase reaction during charge and discharge in the hybrid LNMO, as revealed by the in operando synchrotron X-ray powder diffraction results. Moreover, the hybrid LNMO exhibits surface planes (210) with the highest Mn defect formation energy, prohibiting Mn<sup>3+</sup> disproportionation and further stabilizing its cycling stability. This work not only demonstrates the importance of crystallographic and morphological controls on the high-voltage spinel performance, but also opens a window for battery engineers and researchers to develop battery technology for high-power applications.
dc.description.statementofresponsibilityHaiping Liu, Gemeng Liang, Chao Gao, Sifu Bi, Qiang Chen, Ying Xie ... et al.
dc.identifier.citationNano Energy, 2019; 66
dc.identifier.doi10.1016/j.nanoen.2019.104100
dc.identifier.issn2211-2855
dc.identifier.issn2211-3282
dc.identifier.orcidLiang, G. [0000-0002-2302-4932]
dc.identifier.orcidGuo, Z. [0000-0003-3464-5301]
dc.identifier.urihttps://hdl.handle.net/2440/132305
dc.language.isoen
dc.publisherElsevier
dc.relation.granthttp://purl.org/au-research/grants/arc/FT160100251
dc.relation.granthttp://purl.org/au-research/grants/arc/FT150100109
dc.rights© 2019 Elsevier Ltd. All rights reserved.
dc.source.urihttps://doi.org/10.1016/j.nanoen.2019.104100
dc.subjectLithium-ion batteries; high-voltage spinel; hybrid morphology; high rate performance; superior cycling stability
dc.titleInsight into the improved cycling stability of sphere-nanorod-like micro-nanostructured high voltage spinel cathode for lithium-ion batteries
dc.typeJournal article
pubs.publication-statusPublished

Files

Collections

Physics publications