Nanoscale surface modification of Li-rich layered oxides for high-capacity cathodes in Li-ion batteries

Lan, Xiwei; Yue, Xin; Wang, Yunlong; Hu, Xianluo

doi:10.1007/s11051-018-4165-y

Cited by 15 publications

(8 citation statements)

References 220 publications

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“…The interplanar spacing in Li 2 MnO 3 and Li 2 Mn 0.95 Eu 0.05 O 3 was determined to be 4.72 Å and 4.761 Å respectively, indicating that Eu-doping expanded the cell lattice due to its larger ionic radius. Furthermore, the interplanar spacing of both materials was found to be in the range of reported values [51][52][53][54] and correspond to the (100) direction of Li 2 MnO 3 crystal.…”

Section: Morphological Characterizationmentioning

confidence: 70%

Nanostructured europium-doped layered lithium manganese oxide as a prospective cathode material for aqueous lithium-ion battery

Mabokela

Nwanya

Ndipingwi

et al. 2023

Electrochimica Acta

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Section: Morphological Characterizationmentioning

confidence: 70%

Nanostructured europium-doped layered lithium manganese oxide as a prospective cathode material for aqueous lithium-ion battery

Mabokela

Nwanya

Ndipingwi

et al. 2023

Electrochimica Acta

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“…Li-Rich Layered Oxides: x Li 2 MnO 3 •(1 À x) LiMO 2 (M ¼ Ni, Mn, Co), as the cathode of LIBs, has been widely studied due to high specific capacity of 250 mAh g À1 and high operating voltage of 4.5 V (vs Li/Li þ ). [126][127][128] However, similar problems in NCM appeared in Li-rich layered cathode, such as large initial irreversible capacity, poor rate performance, and serious phase transition, etc. The coating of CPs on the electrode surface is an effective solution to solve these problems.…”

Section: Cathodementioning

confidence: 99%

Recent Progresses on Applications of Conducting Polymers for Modifying Electrode of Rechargeable Batteries

Zhang

Wang

et al. 2021

Adv Energy and Sustain Res

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In recent years, the rapid development of electric vehicles, smart grids, and portable electronic devices have given a boost to energy storage devices represented by rechargeable batteries. Seeking for reliable security, cost‐effectiveness, and especially high energy density of rechargeable batteries is the crucial demand. The key to improve energy density of rechargeable batteries is adopting high theoretical capacity electrodes or reducing the content of nonredox components. Unfortunately, some problems such as poor cycle stability and low rate performance caused by poor conductivity and unstable structure limit the application of high‐capacity electrodes. Conducting polymers (CPs) are widely used to modify electrode materials to promote the carrier transport and suppress the volume expansion during cycles due to their good conductivity, electroactivity, and machinability. In this Review, the conductive mechanisms, synthesis methods, and the applications in modifying electrodes with CPs are discussed. Also, the recent progresses about CPs‐modified electrodes including coating, intercalation, and carbonization in rechargeable batteries are summarized. Finally, the challenges and the further developments for modifying electrodes with CPs, which aims to provide the assistance for developing high‐performance CPs composite electrodes, are proposed.

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“…[14] Among them, the surface coating has been proved to be an effective way to mitigate surface issues by inhibiting the electrolyte corrosion and transition metal ion dissolution. [15] Numerous coating materials have been applied to protect the surfaces of LROs, such as fluorides (e.g., AlF 3 , CaF 2 , FeF 3 , CeF 3 and LiF), metallic oxides (e.g., Al 2 O 3 , MnO 2 , SnO 2 , V 2 O 5 , CeO 2 and MoO 3 ) , phosphates (e.g., Li 3 PO 4 , AlPO 4 , CePO 4 , FePO 4 , LiFePO 4 and LATP), ionic conductors (e.g., LiNi 0.5 Mn 1.5 O 2 , Li 4 Ti 5 O 12 and LiNbO 3 ) and polymers (e.g., PEDOT, dopamine, conducting polypyrrole and PAN). [15] Although these coating materials were able to stabilize the surface structure and suppress interfacial side reactions of LROs, their limited electronic or ionic conductivity has negative effects on the rate capabilities or deliverable capacities in many cases.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and electrochemical performance of La₂CuO₄ as a promising coating material for high voltage Li-rich layered oxide cathodes

Guo

et al. 2023

Chinese Phys. B

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The structural transformations, oxygen releasing and side reactions with electrolytes on the surface are considered as the main causes of the performance degradation of Li-rich layered oxides (LROs) cathodes in Li-ion batteries. Thus, stabilizing the surfaces of LROs is the key to realize their practical application in high energy density Li-ion batteries. Surface coating is regarded as one of the most effective strategies for high voltage cathodes. The ideal coating materials should prevent cathodes from electrolyte corrosion and possess both electronic and Li-ionic conductivities simultaneously. However, commonly reported coating materials are unable to balance these functions well. Herein, a new type of coating material, La2CuO4 was introduced to mitigate the surface issues of LROs for the first time, due to its superb electronic conductivity (26-35 mS cm-1) and lithium-ionic diffusion coefficient (10-12-10-13cm2 s-1). After coating with the La2CuO4, the capacity retention of Li1.2Ni0.54Co0.13Mn0.13O2 cathode was increased to 85.9% (compared to 79.3% of uncoated cathode) after 150 cycles in the voltage range of 2.0-4.8V. In addition, only negligible degradations on the deliverable capacity and rate capability were observed.

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Nanoscale surface modification of Li-rich layered oxides for high-capacity cathodes in Li-ion batteries

Cited by 15 publications

References 220 publications

Nanostructured europium-doped layered lithium manganese oxide as a prospective cathode material for aqueous lithium-ion battery

Nanostructured europium-doped layered lithium manganese oxide as a prospective cathode material for aqueous lithium-ion battery

Recent Progresses on Applications of Conducting Polymers for Modifying Electrode of Rechargeable Batteries

Synthesis and electrochemical performance of La₂CuO₄ as a promising coating material for high voltage Li-rich layered oxide cathodes

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Nanoscale surface modification of Li-rich layered oxides for high-capacity cathodes in Li-ion batteries

Cited by 15 publications

References 220 publications

Nanostructured europium-doped layered lithium manganese oxide as a prospective cathode material for aqueous lithium-ion battery

Nanostructured europium-doped layered lithium manganese oxide as a prospective cathode material for aqueous lithium-ion battery

Recent Progresses on Applications of Conducting Polymers for Modifying Electrode of Rechargeable Batteries

Synthesis and electrochemical performance of La2CuO4 as a promising coating material for high voltage Li-rich layered oxide cathodes

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Synthesis and electrochemical performance of La₂CuO₄ as a promising coating material for high voltage Li-rich layered oxide cathodes