Thermodynamic/Electrochemical Description of High-Voltage Spinels for Lithium-Ion Batteries

doi:10.1149/1945-7111/abb7ec

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	Thermodynamic/Electrochemical Description of High-Voltage Spinels for Lithium-Ion Batteries
	Li, Dajian; Zhang, Weibin; Chang, Keke; Yuan, Yuan; Seifert, Hans J.
刊名	JOURNAL OF THE ELECTROCHEMICAL SOCIETY
	2020
卷号	167 期号:13
关键词	CATHODE MATERIALS THERMODYNAMIC DESCRIPTION LI NI CO LINI0.5MN1.5O4 PERFORMANCE LIMN2O4 CR MN
DOI	10.1149/1945-7111/abb7ec
英文摘要	High-voltage (HV) spinels obtained by partially substituting Mn with other elements in LiMn2O4 are promising cathode materials for lithium-ion batteries (LIBs) due to their superior energy capacities and recyclability. The improved performance of HV spinels comes from the appearance of multi voltage plateaus without phase transformation during lithiation/delithiation process. To optimize the doping elements is one significant routine to develop new cathode materials. However, it is difficult to investigate HV spinels with multi doping elements due to increased variables. For the first time, we investigate the typical HV spinel, Li(Ni, Mn)(2)O-4 using one single thermodynamic model with Compound Energy Formalism (CEF), i.e., (Va, Li+)(1) (Li+, Ni2+, Ni4+, Mn3+, Mn4+)(2)(O2-)(4) and described Ni substitution of Mn as well as lithiation/delithiation behaviours. Both the high voltage (around 4.7 V) and low voltage (around 4.1 V) plateaus of the Li-Ni-Mn-O spinel cathodes are predicted by correctly describing competition between Mn3+/Mn4+ and Ni2+/Ni4+ redox pairs. Meanwhile, we have successfully modelled the key property parameters including the voltage profile, energy density, stability, and cyclability. The presented design scheme is based on the superior cell performance compared to the widely studied LiNi0.5Mn1.5O4, which results in the slightly Li-rich HV spinel Li1+xNi0.5Mn1.5-xO4 because of higher energy density and improved cyclability. The here adopted research strategy enables efficient design of the new-generation multi-doped HV spinel Li(M, Mn)(2)O-4 (M = Li, Al, Co, Cr, Cu, Mg, Fe, Ni, Zn, etc.). (c) 2020 The Electrochemical Society ("ECS"). Published on behalf of ECS by IOP Publishing Limited.
学科主题	Electrochemistry ; Materials Science
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/20213]
专题	2020专题
作者单位	Li, DJ (corresponding author), Karlsruhe Inst Technol, Inst Appl Mat Appl Mat Phys IAM AWP, D-76344 Eggenstein Leopoldshafen, Germany.
推荐引用方式 GB/T 7714	Li, Dajian,Zhang, Weibin,Chang, Keke,et al. Thermodynamic/Electrochemical Description of High-Voltage Spinels for Lithium-Ion Batteries[J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY,2020,167(13).
APA	Li, Dajian,Zhang, Weibin,Chang, Keke,Yuan, Yuan,&Seifert, Hans J..(2020).Thermodynamic/Electrochemical Description of High-Voltage Spinels for Lithium-Ion Batteries.JOURNAL OF THE ELECTROCHEMICAL SOCIETY,167(13).
MLA	Li, Dajian,et al."Thermodynamic/Electrochemical Description of High-Voltage Spinels for Lithium-Ion Batteries".JOURNAL OF THE ELECTROCHEMICAL SOCIETY 167.13(2020).