Preparation of porous Li1.2Mn0.54Ni0.13Co0.13O2 micro-cubes for high-capacity lithium-ion batteries

Deng, Boda; Lin, Zhijie; Chen, Yuanzhi; He, Wei; Wang, Jinming; Xie, Qingshui; Wang, Laisen; Peng, Dong‐Liang

doi:10.1016/j.jallcom.2020.155152

Cited by 15 publications

(7 citation statements)

References 58 publications

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“…18 Weak peaks in the range of 390−440 cm −1 are related to the crystal structure vibration of the Li 2 MnO 3 phase with C2/m symmetry. 20 Compared with F-LR and R-LR materials, the enlarged and right shift of A lg peak indicate the existence of LiMn 2 O 4 -type spinel phase for S-LR materials. 21 The generation of surface spinel phase can be ascribed to the existence of lithium and oxygen vacancies leading to the reconstruction of surface crystal structure during the sintering process.…”

Section: ■ Results and Discussionmentioning

confidence: 92%

Facile Morphology Modulation to Enhance Stability and Fast Kinetics of Anionic Redox for Li-Rich Layered Oxides Cathodes

Zhang,

Guo,

Gao

et al. 2024

ACS Appl. Energy Mater.

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Li-rich layered oxide cathodes (LLOs) have been regarded as promising high-energy-density cathode materials for lithium-ion batteries due to exceptional specific capacity and eco-friendly nature. However, issues such as irreversible oxygen evolution and severe structural degradation have led to low initial Coulombic efficiency (ICE), poor cycling stability, voltage decay, and unfavorable rate performance. In this work, we have systematically manipulated the morphologies and structures of low cobalt-containing LLOs, specifically Li 1.08 Mn 0.54 Ni 0.21 Co 0.07 O 2 , to stabilize anionic redox chemistry and enhance the rapid kinetic performance of LLOs, resulting in optimized electrochemical properties. Electrochemical testing has demonstrated that LLOs with radial shapes exhibit superior performance, achieving a high ICE of 88.74% with reversible discharging capacity of 285.1 mAh/g and excellent capacity retention of 85.35% at 1 C after 100 cycles. Furthermore, even at 5 C, these LLOs maintain a high discharge capacity of 165.8 mAh/g, indicating significantly improved rate performance due to modulation of their morphology and structure. This work provides valuable insight into the design of high-energy-density LLOs via morphology and structure modulation, laying the groundwork for large-scale production of lithium-ion batteries in the near future.

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Section: ■ Results and Discussionmentioning

confidence: 92%

Facile Morphology Modulation to Enhance Stability and Fast Kinetics of Anionic Redox for Li-Rich Layered Oxides Cathodes

Zhang,

Guo,

Gao

et al. 2024

ACS Appl. Energy Mater.

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“…Among all the samples, LLMO-L3 with a size of 10 mm is slightly smaller than the other two, which is conducive to improving the capacity and rate performance of the material due to the shortened diffusion path of Li + inside the particles. 32 Moreover, abundant pores are formed when the primary particles are aggregated into large irregular particles. This structure would contribute to increasing the effective contact area between the material and the electrolyte, which boosts the lattice O to a greater extent and further increases the capacity of the material.…”

Section: Electrochemical Measurementsmentioning

confidence: 99%

Highly activated oxygen redox enabling large-capacity Li-rich layered manganese-based oxide cathodes

Lin

Wen

Zhu

et al. 2023

Phys. Chem. Chem. Phys.

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“…The highest capacity was observed in lms deposited with lower power (Po-), demonstrating its dependency on physical properties, like crystallite size and roughness. A small crystallite size improves the kinetic performance, whereas the elevated roughness can generate a greater number of lithium diffuser channels and expand the contact area between the lm and the electrolyte, improving the diffusion of lithium ions in the material and increasing its charge capacity [38,39].…”

Section: Electrochemical Characterization Of Nmc333 Lmsmentioning

confidence: 99%

Effect of RF magnetron sputtering parameters on the optimization of the discharge capacity of ternary lithium oxide thin films

Lopez

Chagas

Batista

et al. 2021

J Mater Sci: Mater Electron

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The increasing demand for lithium-ion batteries has stimulated the investigation of new compounds in order to reduce the costs and the toxicity of their cathodes. Materials constituted of ternary lithiated oxide compounds are a successful alternative to cobalt-rich cathodes. The main disadvantage of ternary compound materials (TCM) is that the maximum amount of electrical charge is only achieved at high redox potentials, a limiting factor if we consider the current development in electrolyte technology. In this work, we investigated the in uence of sputtering deposition parameters on the charge capacity of TCM thin lms, restraining their electrochemical potential to conventional values. To do so, we analyzed the impact that small changes in crystalline and morphological structures have on the charge capacity at low cell potentials. For this, we performed the RF magnetron sputtering of TCM thin lms, and carried out a factorial design of experiments to investigate their electrochemical properties, while limiting the charging potential to 4.20 V vs. Li|Li + . The lms were deposited onto a rigid and conductive substrate with different parameters (power and pressure at room temperature). Electrochemical results showed that the discharge capacity is strongly in uenced by the deposition parameters, reaching 250 mAh g − 1 even at 4.20 V vs. Li. This value is superior to the ones of the conventional cobalt cathode and the bulk ternary electrode. Both deposition parameters exhibited a synergic dependency, which means that they need to be simultaneously varied for a response optimization. The discharge capacity of the analyzed samples was highly affected by the surface morphology of the lm and its crystallographic properties, and not by its elemental composition. High discharge capacity was obtained without additional thermal treatments, which favors the manufacture of lms over polymeric substrates for future electronic applications.

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Preparation of porous Li1.2Mn0.54Ni0.13Co0.13O2 micro-cubes for high-capacity lithium-ion batteries

Cited by 15 publications

References 58 publications

Facile Morphology Modulation to Enhance Stability and Fast Kinetics of Anionic Redox for Li-Rich Layered Oxides Cathodes

Facile Morphology Modulation to Enhance Stability and Fast Kinetics of Anionic Redox for Li-Rich Layered Oxides Cathodes

Highly activated oxygen redox enabling large-capacity Li-rich layered manganese-based oxide cathodes

Effect of RF magnetron sputtering parameters on the optimization of the discharge capacity of ternary lithium oxide thin films

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