Structural and electrochemical characterization of LiMn2O4 and Li1.05Mn1.97Nb0.03O4 with excellent high-temperature cycling stability synthesized by a simple route

Pan, Kaimeng; Hu, Chen; Sun, Zhonghui; Xu, Genyang; Zhang, Dong; Yu, Lihong; Wang, Kangli; Jiang, Kai

doi:10.1007/s10800-020-01403-6

Cited by 3 publications

(2 citation statements)

References 24 publications

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“…In contrast, the weight of the sample containing Li 2 CO 3 (Figure 3b) decreased by 5% between 545 • C and 735 • C; the endothermic peak observed at 720 • C was attributed to the melting of Li 2 CO 3 (m.p. Li 2 CO 3 = 723 • C) [30]. The exothermal reaction due to the formation of complex oxides could not be observed because the small amount of PGMs precluded detection.…”

Section: Calcination and Influence Of LI 2 Co 3 Additionmentioning

confidence: 99%

Recovery of Platinum Group Metals from Spent Automotive Catalysts Using Lithium Salts and Hydrochloric Acid

2021

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The recovery of platinum group metals (PGMs) from waste materials involves dissolving the waste in an aqueous solution. However, since PGMs are precious metals, their dissolution requires strong oxidizing agents such as chlorine gas and aqua regia. In this study, we aimed to recover PGMs via the calcination of spent automotive catalysts (autocatalysts) with Li salts based on the concept of “spent autocatalyst + waste lithium-ion batteries” and leaching with only HCl. The results suggest that, when Li2CO3 was used, the Pt content was fully leached, while 94.9% and 97.5% of Rh and Pd, respectively, were leached using HCl addition. Even when LiF, which is a decomposition product of the electrolytic solution (LiPF6), was used as the Li salt model, the PGM leaching rate did not significantly change. In addition, we studied the immobilization of fluorine on cordierite (2MgO·2Al2O3·5SiO2), which is a matrix component of autocatalysts. Through the calcination of LiF in the presence of cordierite, we found that cordierite thermally decomposed, and fluorine was immobilized as MgF2.

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Section: Calcination and Influence Of LI 2 Co 3 Additionmentioning

confidence: 99%

Recovery of Platinum Group Metals from Spent Automotive Catalysts Using Lithium Salts and Hydrochloric Acid

2021

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“…The specific discharge capacity reaches 100 and 80 mAh g −1 at 25 and 55 • C, 2 C rate, respectively. It can effectively improve the cycling performance of LNMO materials [22,23]. Therefore, in this paper, niobium pentoxide was used as the doping substance to explore the influence of Nb doping on the properties of 5 V high-voltage spinel LNMO materials.…”

Section: Introductionmentioning

confidence: 99%

Study on high voltage (5 V) spinel lithium manganese oxide LiNi_0.5Mn_1.5O₄ by doping niobium

Li,

Wang,

et al. 2024

Micro & Nano Letters

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The effect of niobium ions with high‐valence doping on high‐voltage LiNi0.5Mn1.5O4 (LNMO) materials was investigated. LiNi0.5Mn1.5−xNbxO4 was prepared by doping high‐valent niobium ions into LiNi0.5Mn1.5O4 material using the organic assisted combustion method. The experimental samples were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X‐ray diffraction (XRD), X‐ray photoelectron spectroscopy (XPS), electrochemical impedance (EI), and cyclic voltammetry (CV) analysis. The experimental results show that ‐doping with high‐valence niobium ions changes the orientation of the crystal plane growth of spinel particles, and the morphology of these particles changes from the octahedral shape before doping to the spherical shape after doping. With the increase in doping amount, the crystal structure changes gradually, resulting in the Li0.96Nb1.01O3 impurity phase. The doping of high valence‐niobium ions increases the content of Mn3+ in the material, resulting in the appearance of a 4 V discharge platform and the formation of a 4.7 and 4 V discharge platforms. The doping of Nb can improve the cycling stability of LiNi0.5Mn1.5O4 material, but the specific capacity of the material is reduced.

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Process and mechanism of enhanced HCl leaching of platinum group metals from waste three-way catalysts by Li2CO3 calcination pretreatment

Sun

Jin

Zhao

et al. 2023

Journal of Hazardous Materials

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Structural and electrochemical characterization of LiMn2O4 and Li1.05Mn1.97Nb0.03O4 with excellent high-temperature cycling stability synthesized by a simple route

Cited by 3 publications

References 24 publications

Recovery of Platinum Group Metals from Spent Automotive Catalysts Using Lithium Salts and Hydrochloric Acid

Recovery of Platinum Group Metals from Spent Automotive Catalysts Using Lithium Salts and Hydrochloric Acid

Study on high voltage (5 V) spinel lithium manganese oxide LiNi_0.5Mn_1.5O₄ by doping niobium

Process and mechanism of enhanced HCl leaching of platinum group metals from waste three-way catalysts by Li2CO3 calcination pretreatment

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Structural and electrochemical characterization of LiMn2O4 and Li1.05Mn1.97Nb0.03O4 with excellent high-temperature cycling stability synthesized by a simple route

Cited by 3 publications

References 24 publications

Recovery of Platinum Group Metals from Spent Automotive Catalysts Using Lithium Salts and Hydrochloric Acid

Recovery of Platinum Group Metals from Spent Automotive Catalysts Using Lithium Salts and Hydrochloric Acid

Study on high voltage (5 V) spinel lithium manganese oxide LiNi0.5Mn1.5O4 by doping niobium

Process and mechanism of enhanced HCl leaching of platinum group metals from waste three-way catalysts by Li2CO3 calcination pretreatment

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Study on high voltage (5 V) spinel lithium manganese oxide LiNi_0.5Mn_1.5O₄ by doping niobium