Nkosi, FPJafta, CJKebede, Mesfin ALe Roux, Lukas JMathe, Mahlanyane KOzoemena, KI2016-04-142016-04-142015-03Nkosi, F.P., Jafta, C.J., Kebede, M., Le Roux, L.K., Mathe, M.K. and Ozoemena, K.I. 2015. Microwave-assisted optimization of the manganese redox states for enhanced capacity and capacity retention of LiAl(subx)Mn(sub2-x)O(sub4) (x = 0 and 0.3) spinel materials. RSC Advances, vol. 5, pp 32256-322622046-2069http://pubs.rsc.org/en/content/articlelanding/ra/2015/c5ra02643a#!divAbstracthttp://hdl.handle.net/10204/8480Copyright: 2015 Royal Society of ChemistryMicrowave irradiation at the pre- and post-annealing steps of the synthesis of LiAl(subx)Mn(sub2-x)O(sub4) (x = 0 and 0.3) spinel cathode materials for rechargeable lithium ion battery is a useful strategy to optimize the average manganese valence number (n(subMn)) for enhanced capacity and capacity retention. The strategy impacts on the lattice parameter, average manganese valence, particle size and morphology, reversibility of the de-intercalation/intercalation processes, and capacity retention upon continuous cycling. Microwave irradiation is able to shrink the particles for improved crystallinity. The XPS data clearly suggest that microwave irradiation can be used to tune the manganese valence (n(subMn)), and that the LiAl(subx)Mn(sub2-x)O(sub4) with n(subMn) ˜ 3.5+ gives the best electrochemical performance. These new findings promise to revolutionize how we use microwave irradiation in the preparation of energy materials and various other materials for energy storage and conversion materials for enhanced performance.enMicrowaveLithium manganese oxideManganese valence numberCapacity retentionArticleNkosi, F., Jafta, C., Kebede, M. A., Le Roux, L. J., Mathe, M. K., & Ozoemena, K. (2015). Microwave-assisted optimization of the manganese redox states for enhanced capacity and capacity retention of LiAl(subx)Mn(sub2-x)O(sub4) (x = 0 and 0.3) spinel materials. http://hdl.handle.net/10204/8480Nkosi, FP, CJ Jafta, Mesfin A Kebede, Lukas J Le Roux, Mahlanyane K Mathe, and KI Ozoemena "Microwave-assisted optimization of the manganese redox states for enhanced capacity and capacity retention of LiAl(subx)Mn(sub2-x)O(sub4) (x = 0 and 0.3) spinel materials." (2015) http://hdl.handle.net/10204/8480Nkosi F, Jafta C, Kebede MA, Le Roux LJ, Mathe MK, Ozoemena K. Microwave-assisted optimization of the manganese redox states for enhanced capacity and capacity retention of LiAl(subx)Mn(sub2-x)O(sub4) (x = 0 and 0.3) spinel materials. 2015; http://hdl.handle.net/10204/8480.TY - Article AU - Nkosi, FP AU - Jafta, CJ AU - Kebede, Mesfin A AU - Le Roux, Lukas J AU - Mathe, Mahlanyane K AU - Ozoemena, KI AB - Microwave irradiation at the pre- and post-annealing steps of the synthesis of LiAl(subx)Mn(sub2-x)O(sub4) (x = 0 and 0.3) spinel cathode materials for rechargeable lithium ion battery is a useful strategy to optimize the average manganese valence number (n(subMn)) for enhanced capacity and capacity retention. The strategy impacts on the lattice parameter, average manganese valence, particle size and morphology, reversibility of the de-intercalation/intercalation processes, and capacity retention upon continuous cycling. Microwave irradiation is able to shrink the particles for improved crystallinity. The XPS data clearly suggest that microwave irradiation can be used to tune the manganese valence (n(subMn)), and that the LiAl(subx)Mn(sub2-x)O(sub4) with n(subMn) ˜ 3.5+ gives the best electrochemical performance. These new findings promise to revolutionize how we use microwave irradiation in the preparation of energy materials and various other materials for energy storage and conversion materials for enhanced performance. DA - 2015-03 DB - ResearchSpace DP - CSIR KW - Microwave KW - Lithium manganese oxide KW - Manganese valence number KW - Capacity retention LK - https://researchspace.csir.co.za PY - 2015 SM - 2046-2069 T1 - Microwave-assisted optimization of the manganese redox states for enhanced capacity and capacity retention of LiAl(subx)Mn(sub2-x)O(sub4) (x = 0 and 0.3) spinel materials TI - Microwave-assisted optimization of the manganese redox states for enhanced capacity and capacity retention of LiAl(subx)Mn(sub2-x)O(sub4) (x = 0 and 0.3) spinel materials UR - http://hdl.handle.net/10204/8480 ER -