Ncube, NMMhlongo, WTMcCrindle, RIZheng, Haitao2018-10-102018-10-102018-05Ncube, N.M. et al. 2018. The electrochemical effect of Al-doping on Li4Ti5O12 as anode material for lithium-ion batteries. Materials Today: Proceedings, vol. 5(4): 10592-10601Materials Today: Proceedingshttps://www.sciencedirect.com/science/article/pii/S2214785317333989https://doi.org/10.1016/j.matpr.2017.12.392http://hdl.handle.net/10204/10456Copyright: 2018 Elsevier. Due to copyright restrictions, the attached PDF file only contains the abstract of the full text item. For access to the full text item, please consult the publisher's website.This work investigates the electrochemical performance of Al-doped Li4Ti5O12 (LTO) on the Li site (Li4-xAlxTi5O12) and Ti site (Li4Ti5-xAlxO12) (x = 0.15), evaluated by galvanostatic charge-discharge tests and the electrochemical impedance spectroscopy. The physical properties of the synthesized materials were determined by XRD, SEM, Raman and XPS analyses. The Al dopant observed on different sites of Li4Ti5O12 showed resultant effects on the morphology, particle size, structural arrangement and crystallinity of the materials. XRD and XPS results showed peak shifts to higher angles and lower binding energies, respectively. Moreover, XPS revealed the majority of Al doped into the Ti site for Li4Ti4.85Al0.15O12 and into the Li site for Li3.85Al0.15Ti5O12. Li4Ti4.85Al0.15O12 has shown much improvement of the reversible capacity and rate capability of LTO without Li deficiency compared with Li3.85Al0.15Ti5O12. Li4Ti4.85Al0.15O12 also demonstrated superior reversible capacity at 0.2 C (172.7 mAh/g), 0.5 C (143.7 mAh/g) and 1 C (132.1 mAh/g). These were comparatively higher than Li4Ti5O12 (154.8, 124.1 and 100.7 mAh/g, respectively) and Li3.85Al0.15Ti5O12 (154.4, 133.6 and 120.3 mAh/g, respectively).enLTOAl-dopingAnode materialsCapacity lithium-ion batteryArticleNcube, N., Mhlongo, W., McCrindle, R., & Zheng, H. (2018). The electrochemical effect of Al-doping on Li4Ti5O12 as anode material for lithium-ion batteries. http://hdl.handle.net/10204/10456Ncube, NM, WT Mhlongo, RI McCrindle, and Haitao Zheng "The electrochemical effect of Al-doping on Li4Ti5O12 as anode material for lithium-ion batteries." (2018) http://hdl.handle.net/10204/10456Ncube N, Mhlongo W, McCrindle R, Zheng H. The electrochemical effect of Al-doping on Li4Ti5O12 as anode material for lithium-ion batteries. 2018; http://hdl.handle.net/10204/10456.TY - Article AU - Ncube, NM AU - Mhlongo, WT AU - McCrindle, RI AU - Zheng, Haitao AB - This work investigates the electrochemical performance of Al-doped Li4Ti5O12 (LTO) on the Li site (Li4-xAlxTi5O12) and Ti site (Li4Ti5-xAlxO12) (x = 0.15), evaluated by galvanostatic charge-discharge tests and the electrochemical impedance spectroscopy. The physical properties of the synthesized materials were determined by XRD, SEM, Raman and XPS analyses. The Al dopant observed on different sites of Li4Ti5O12 showed resultant effects on the morphology, particle size, structural arrangement and crystallinity of the materials. XRD and XPS results showed peak shifts to higher angles and lower binding energies, respectively. Moreover, XPS revealed the majority of Al doped into the Ti site for Li4Ti4.85Al0.15O12 and into the Li site for Li3.85Al0.15Ti5O12. Li4Ti4.85Al0.15O12 has shown much improvement of the reversible capacity and rate capability of LTO without Li deficiency compared with Li3.85Al0.15Ti5O12. Li4Ti4.85Al0.15O12 also demonstrated superior reversible capacity at 0.2 C (172.7 mAh/g), 0.5 C (143.7 mAh/g) and 1 C (132.1 mAh/g). These were comparatively higher than Li4Ti5O12 (154.8, 124.1 and 100.7 mAh/g, respectively) and Li3.85Al0.15Ti5O12 (154.4, 133.6 and 120.3 mAh/g, respectively). DA - 2018-05 DB - ResearchSpace DP - CSIR KW - LTO KW - Al-doping KW - Anode materials KW - Capacity lithium-ion battery LK - https://researchspace.csir.co.za PY - 2018 SM - Materials Today: Proceedings T1 - The electrochemical effect of Al-doping on Li4Ti5O12 as anode material for lithium-ion batteries TI - The electrochemical effect of Al-doping on Li4Ti5O12 as anode material for lithium-ion batteries UR - http://hdl.handle.net/10204/10456 ER -