Effect of (Mg, Al) double doping on the thermal decomposition of LiMn2O4 cathodes investigated by time-resolved X-ray diffraction

Susanto, Dieky; Kim, Haesik; Kim, Jiyoung; Lim, Sunhye; Yang, JiWoon; Choi, Su An; Chung, Kyung Yoon

doi:10.1016/j.cap.2015.01.027

Cited by 6 publications

(3 citation statements)

References 19 publications

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“…Partial substitution of Mn 3+ ions increases oxidation state of Mn in bulk LMO resulting in a strengthening of chemical bond between metal ions and oxide due to stronger chemical bonds of dopant, which prevent Mn 3+ ions’ dissolution in electrolyte through dismutation reaction, and suppression of Jahn-Teller distortion [ 22 ]. Cation doping includes Li + , Ni 2+ , Zn 2+ , Mg 2+ , Al 3+ , Cr 3+ , Co 3+ , Ga 3+ , Ti 4+ , etc.…”

Section: Introductionmentioning

confidence: 99%

“…[ 23 ]. Among potential doping elements, a transition nonmetal like Mg attracted a lot of attention due to its good electronic conductivity and its ability to stabilize the LMO host crystal structure [ 18 , 22 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 ] in addition to having many advantages, such as abundance, nontoxicity, low cost, and being lighter than transition metal elements.…”

Section: Introductionmentioning

confidence: 99%

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Kinetic and Thermodynamic Studies on Synthesis of Mg-Doped LiMn2O4 Nanoparticles

2020

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In this work, a first study on kinetics and thermodynamics of thermal decomposition for synthesis of doped LiMn2O4 nanoparticles is presented. The effect of Mg doping concentration on thermal decomposition of synthesis precursors, prepared by ultrasound-assisted Pechini-type sol–gel process, and its significance on nucleation and growth of Mg-doped LiMn2O4 nanoparticles was studied through a method based on separation of multistage processes in single-stage reactions by deconvolution and transition state theory. Four zones of thermal decomposition were identified: Dehydration, polymeric matrix decomposition, carbonate decomposition and spinel formation, and spinel decomposition. Kinetic and thermodynamic analysis focused on the second zone. First-order Avrami-Erofeev equation was selected as reaction model representing the polymer matrix thermal decomposition. Kinetic and thermodynamic parameters revealed that Mg doping causes an increase in thermal inertia on conversion rate, and CO2 desorption was the limiting step for formation of thermodynamically stable spinel phases. Based on thermogravimetry experiments and the effect of Mg on thermal decomposition, an optimal two-stage heat treatment was determined for preparation of LiMgxMn2-xO4 (x = 0.00, 0.02, 0.05, 0.10) nanocrystalline powders as promising cathode materials for lithium-ion batteries. Crystalline structure, morphology, and stoichiometry of synthesized powders were characterized by XRD, FE-SEM, and AAS, respectively.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Kinetic and Thermodynamic Studies on Synthesis of Mg-Doped LiMn2O4 Nanoparticles

2020

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“…Whereas LiMn 2 O 4 belongs to spinel-type structure with worse cycle performance, which is affected by Jahn-Teller distortion accompanied with structural transformation during charge-discharge process (Ouyang et al, 2009). A lots of work has been conducted to improve the performance of LiMn 2 O 4 by doping with diverse elements , such as F (Chen et al, 2010;Feng et al, 2010), Cr (Xu et al, 2011), Nb (Yi et al, 2013), Mg (Susanto et al, 2015). LiFePO 4 is more stable but the conductivity is poor.…”

Section: Introductionmentioning

confidence: 99%

Comparison of the Electrochemical Performance and Thermal Stability for Three Kinds of Charged Cathodes

et al. 2018

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The electrochemical performance and thermal stability of Li(Ni 0.5 Co 0.2 Mn 0.3)O 2 , LiMn 2 O 4 , and LiFePO 4 are investigated by the multi-channel battery cycler, electrochemical workstation, thermogravimetric analysis (TGA) and C80 instrument in this work. For electrochemical performance, Li(Ni 0.5 Co 0.2 Mn 0.3)O 2 shows the highest specific capacity but the worst cycle stability. For the thermal stability, the experimental results of thermogravimetry and C80 indicate that the charged Li(Ni 0.5 Co 0.2 Mn 0.3)O 2 has the worst thermal stability compared with charged LiFePO 4 and LiMn 2 O 4. It is also testified by calculating the chemical kinetic parameters of cathode materials based on the Arrhenius law. The pure Li(Ni 0.5 Co 0.2 Mn 0.3)O 2 starts to self-decompose at around 250 • C with total heat generation of −88 J/g. As for a full battery, the total heat generation is −810 J/g with exothermic peak temperature of 242 • C. The present results show that thermal runaway is more likely to occur for Li(Ni 0.5 Co 0.2 Mn 0.3)O 2 with the full battery.

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RT-XAMF and TR-XRD studies of solid-state synthesis and thermal stability of NaNiO2 as cathode material for sodium-ion batteries

Kim

Park

et al. 2022

Ceramics International

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Effect of (Mg, Al) double doping on the thermal decomposition of LiMn2O4 cathodes investigated by time-resolved X-ray diffraction

Cited by 6 publications

References 19 publications

Kinetic and Thermodynamic Studies on Synthesis of Mg-Doped LiMn2O4 Nanoparticles

Kinetic and Thermodynamic Studies on Synthesis of Mg-Doped LiMn2O4 Nanoparticles

Comparison of the Electrochemical Performance and Thermal Stability for Three Kinds of Charged Cathodes

RT-XAMF and TR-XRD studies of solid-state synthesis and thermal stability of NaNiO2 as cathode material for sodium-ion batteries

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