Li-Rich Layered Oxides and Their Practical Challenges: Recent Progress and Perspectives

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dc.contributor.authorHu, S.
dc.contributor.authorPillai, A.S.
dc.contributor.authorLiang, G.
dc.contributor.authorPang, W.K.
dc.contributor.authorWang, H.
dc.contributor.authorLi, Q.
dc.contributor.authorGuo, Z.
dc.date.issued2019
dc.description.abstractAbstract: Lithium-rich layered oxides (LLOs), also known as Li<inf>1+x</inf>M<inf>1−x</inf>O<inf>2</inf> or xLi<inf>2</inf>MnO<inf>3</inf>-(1–x)LiMO<inf>2</inf> (M = Ni, Co, Mn), have been regarded as some of the highest capacity lithium cathodes and have attracted increasing attention from battery researchers and engineers in recent years. This is because LLOs possess maximum possible capacities of ~ 280 to 310 mAh g<sup>−1</sup> with a high working potential of ~ 3.7 V (vs. Li<sup>+</sup>/Li<sup>0</sup>) and an astounding energy density of ~ 900 Wh kg<sup>−1</sup>. Despite these promising properties, these technologically important cathodes have not yet been successfully commercialized due to low initial Coulombic efficiency, poor rate capabilities and gradual capacity/voltage fade during electrochemical cycling as well as further complications from continuous structural changes during cycling. Here, researchers have concluded that these issues mainly originate from the electrochemical activation of Li<inf>2</inf>MnO<inf>3</inf> components, which, although it provides anomalously high capacity performances, also causes associated complex anionic redox activities of O and irreversible structural and phase transformations during charging at potentials greater than 4.5 V (vs. Li<sup>+</sup>/Li<sup>0</sup>). To provide perspectives, this review will summarize various attempts made towards addressing these issues and present the connections between electrochemical properties and structural change. In addition, this review will discuss redox chemistries and mechanistic behaviours during cycling and will provide future research directions to guide the commercialization of LLOs. Graphical Abstract: [Figure not available: see fulltext.]
dc.description.statementofresponsibilitySijiang Hu, Anoop. S. Pillai, Gemeng Liang, Wei Kong Pang, Hongqiang Wang, Qingyu Li & Zaiping Guo
dc.identifier.citationElectrochemical Energy Reviews, 2019; 2(2):277-311
dc.identifier.doi10.1007/s41918-019-00032-8
dc.identifier.issn2520-8489
dc.identifier.issn2520-8136
dc.identifier.orcidLiang, G. [0000-0002-2302-4932]
dc.identifier.orcidGuo, Z. [0000-0003-3464-5301]
dc.identifier.urihttps://hdl.handle.net/2440/132308
dc.language.isoen
dc.publisherSpringer Nature
dc.relation.granthttp://purl.org/au-research/grants/arc/FT150100109
dc.relation.granthttp://purl.org/au-research/grants/arc/FT160100251
dc.rights© Shanghai University and Periodicals Agency of Shanghai University 2019
dc.source.urihttps://doi.org/10.1007/s41918-019-00032-8
dc.subjectLi-rich layered oxide; surface coating; voltage fade; oxygen activities; lithium-ion battery
dc.titleLi-Rich Layered Oxides and Their Practical Challenges: Recent Progress and Perspectives
dc.typeJournal article
pubs.publication-statusPublished

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