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The authors would like to correct the Acknowledgements section. The Acknowledgements section should read: Qian Liu is thankful to QUT for offering here QUTPRA scholarship to conduct his research. P. S. is thankful to QUT for the financial support from the Australian Research Council (ARC) for the Future Fellowship (FT130101337) and QUT core funding (QUT/322120-0301/07). S. M. is supported by the Ministry of Education of Singapore. Some of the data reported in this paper were obtained at the Central Analytical Research Facility (CARF) operated by the Institute for Future Environments (QUT). Access to CARF is supported by generous funding from the Science and Engineering Faculty (QUT). This study was supported by the Center for Advanced Soft-Electronics (2013M3A6A5073183) through the NRF grant funded by the Korean government. The Royal Society of Chemistry apologises for these errors and any consequent inconvenience to authors and readers.

In the spinel oxide cathode family, LiNi0.5Mn1.5O4 (LNMO) shows a high operating voltage (approximate to 4.7 V vs Li/Li+) and excellent Li-ion mobility with stable 3D conducting channels. Ni/Mn cation disordered and ordered phases usually coexist in LNMO materials, and they have distinct structural and electrochemical properties, resulting in different battery performances for LNMO materials with different phase compositions. Identifying the correlation between phase compositions and electrochemical properties is of significance to the improvement of battery performance and understanding of degradation mechanisms. Herein, the disordered/ordered phase compositions in LNMO materials are tailored by post-annealing strategies and their impacts on electrochemical performance and degradation mechanisms from the surface to the bulk are systematically investigated. The ordered phase increases rapidly as Mn3+ is oxidized to Mn4+ through a post-annealing process. LNMO with an intermediate fraction of disordered and ordered phases gives rise to improved cycling stability. This article further reports that a high ordered phase fraction can preferentially protect Ni from dissolution during cycling. However, these results suggest that the transition metal dissolution and surface structural change of LNMO do not exhibit a direct correlation with cycling stability. These results indicate the capacity fading mainly correlates with the bulk structural distortion, leading to decreased Li-ion kinetics. ; Department of Chemistry startup funds; U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-76SF00515]; Applied Battery Research (ABR) for Transportation Program; U.S. DOE Office of Science, Office of Basic Energy Sciences [DE-AC05-00OR22725]; U.S. DOE Office of Science User Facility [DE-AC02-05CH11231]; Walter Ahlstrom Foundation; European Union's Horizon 2020 research and innovation programme under the Marie Skodowska-Curie grant [841621] ; Published version ; The work at Virginia Tech was ...