Preparation and electrochemical performance of LiNi0.5Mn1.5O4 spinels with different particle sizes and surface orientations as cathode materials for lithium-ion battery

Guo, Jianling; Deng, Ziyao; Yan, Shuaipeng; Lang, Yaqiang; Gong, Jiajia; Wang, Li; Liang, Guangchuan

doi:10.1007/s10853-020-04973-0

Cited by 12 publications

(11 citation statements)

References 48 publications

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“…The presence of small peaks (110), (020), (-111) and ( 021) is related to the existence of superstructure caused by the reordering of Li and Mn in the main structure, where lithium ions enter into the transition metal layers positions as expected [19,20,27]. Furthermore, the presence of ( 006) and (012) peaks confirm the successful formation of a well crystalline layered structure with no spinal structure using the co-precipitation synthesis method for all values of x [21].…”

Section: Resultsmentioning

confidence: 60%

Influence of operating temperature on the activation efficiency of Li-ion cells with xLi2MnO3-(1-x)LiMn0.5Ni0.5O2 electrodes

Nazario-Naveda

Rojas-Flores

Gallozzo-Cardenas

et al. 2022

J. Electrochem. Sci. Eng.

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In this study, the effect of operating temperature at 55 °C on xLi2MnO3-(1-x)LiMn0.5Ni0.5O2 electrodes during the charge/discharge process at different current densities was investigated. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used for structural and morphological analysis of the fabricated cathode materials, while charge-discharge curves and differential capacity were used to study the electrochemical behavior. Results confirm the formation of the structures with two phases associated with the components of the layered material. It was found that at 55 °C, a capacity higher than 357 mAh g-1 could be achieved at a voltage of 2.5-4.8 V vs. Li/Li+, which was larger than the capacity achieved at room temperature. At 55 °C, a change in valence could be observed during charging and discharging due to the change in the position of the peaks associated with Mn and Ni, highlighting cathodic material with x = 0.5 as the material that retains the layered structure at this temperature. This work confirms the good performance of electrodes made with this material at elevated temperatures and gives a better understanding of its electrochemical behavior.

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Section: Resultsmentioning

confidence: 60%

Influence of operating temperature on the activation efficiency of Li-ion cells with xLi2MnO3-(1-x)LiMn0.5Ni0.5O2 electrodes

Nazario-Naveda

Rojas-Flores

Gallozzo-Cardenas

et al. 2022

J. Electrochem. Sci. Eng.

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“…In Figure 3a, the agglomerations are larger and less spherical. In addition, small pores and a rougher surface can be observed, likely due to the release of CO2 in the heat treatment process and the subsequent formation of oxides [38]. Figure 3c shows agglomerations similar to those mentioned above but smaller, with inhomogeneous growth and the presence of some impurities in some parts, associated with the greater formation of MnO2 [33].…”

Section: Resultsmentioning

confidence: 61%

Effect of x on the Electrochemical Performance of Two-Layered Cathode Materials xLi2MnO3–(1−x)LiNi0.5Mn0.5O2

et al. 2022

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In our study, the cathodic material xLi2MnO3–(1−x)LiNi0.5Mn0.5O2 was synthesized by means of the co-precipitation technique. The effect of x (proportion of components Li2MnO3 and LiNi0.5Mn0.5O2) on the structural, morphological, and electrochemical performance of the material was evaluated. Materials were structurally characterized using X-ray diffraction (XRD), and the morphological analysis was performed using the scanning electron microscopy (SEM) technique, while charge–discharge curves and differential capacity and impedance spectroscopy (EIS) were used to study the electrochemical behavior. The results confirm the formation of the structures with two phases corresponding to the rhombohedral space group R3m and the monoclinic space group C2/m, which was associated to the components of the layered material. Very dense agglomerations of particles between 10 and 20 µm were also observed. In addition, the increase in the proportion of the LiNi0.5Mn0.5O2 component affected the initial irreversible capacity and the Li2MnO3 layer’s activation and cycling performance, suggesting an optimal chemical ratio of the material’s component layers to ensure high energy density and long-term durability.

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“…19,22 The superior electrochemical properties of the latter, especially at high rates and for long-range cycling, and their greater stability when in contact with electrolytes were attributed to the {111} orientation stabilized for all the facets of the octahedral-like particles. 11,15,17,40 Our LNMO platelet samples have multiple surface orientations; nevertheless, with a larger proportion (∼40%) of {111} orientation, it could thus explain the electrochemical performance similar to their octahedral-shaped counterparts. Furthermore, the overall primary particle morphology of the platelets promotes fast diffusion for Li + ions due to short distances along their nanometric thicknesses.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Molten Salt Synthesis of Multifaceted Pure-Phase Spinel LiNi_0.5Mn_1.5O₄ Platelets

Oney

Olchowka

Demortière

et al. 2023

ACS Appl. Energy Mater.

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The spinel LiNi0.5Mn1.5O4 is largely studied as a positive electrode material for lithium-ion batteries, but further optimization of its properties is required to enable its commercialization. The superior electrochemical performance of the disordered polymorph of LiNi0.5Mn1.5O4 is limited by its traditional method of synthesis. This solid-state route generates impurities that reduce the specific capacity and results in the formation of octahedral particles with exposed {111} facets, thus limiting exploration of the effects of surface orientation. In this work, we report for the first time the preparation of a disordered impurity-free LiNi0.5Mn1.5O4 with platelet-like morphology via molten salt synthesis. We discovered that these platelets exhibit multiple surface orientations, including {111}, {112}, and six other high-indexed facets, and deliver energy storage performance equivalent to that of their octahedral counterpart. Such an ability to tune primary particle morphology and orientation will open the gate to investigate mechanisms at the individual particle level using spectroscopy and microscopy techniques.

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Preparation and electrochemical performance of LiNi0.5Mn1.5O4 spinels with different particle sizes and surface orientations as cathode materials for lithium-ion battery

Cited by 12 publications

References 48 publications

Influence of operating temperature on the activation efficiency of Li-ion cells with xLi2MnO3-(1-x)LiMn0.5Ni0.5O2 electrodes

Influence of operating temperature on the activation efficiency of Li-ion cells with xLi2MnO3-(1-x)LiMn0.5Ni0.5O2 electrodes

Effect of x on the Electrochemical Performance of Two-Layered Cathode Materials xLi2MnO3–(1−x)LiNi0.5Mn0.5O2

Molten Salt Synthesis of Multifaceted Pure-Phase Spinel LiNi_0.5Mn_1.5O₄ Platelets

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Preparation and electrochemical performance of LiNi0.5Mn1.5O4 spinels with different particle sizes and surface orientations as cathode materials for lithium-ion battery

Cited by 12 publications

References 48 publications

Influence of operating temperature on the activation efficiency of Li-ion cells with xLi2MnO3-(1-x)LiMn0.5Ni0.5O2 electrodes

Influence of operating temperature on the activation efficiency of Li-ion cells with xLi2MnO3-(1-x)LiMn0.5Ni0.5O2 electrodes

Effect of x on the Electrochemical Performance of Two-Layered Cathode Materials xLi2MnO3–(1−x)LiNi0.5Mn0.5O2

Molten Salt Synthesis of Multifaceted Pure-Phase Spinel LiNi0.5Mn1.5O4 Platelets

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Molten Salt Synthesis of Multifaceted Pure-Phase Spinel LiNi_0.5Mn_1.5O₄ Platelets