Enhancement on structural stability of Ni-rich cathode materials by in-situ fabricating dual-modified layer for lithium-ion batteries

Liu, Yang; Tang, Lin‐bo; Wei, Han‐xin; Zhang, Xiahui; He, Zhenjiang; Li, Yunjiao; Zheng, Junchao

doi:10.1016/j.nanoen.2019.104043

Cited by 223 publications

(104 citation statements)

References 49 publications

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“…In contrast, the splitting peak of pristine NCM622 is almost eliminated, demonstrating the layered structure has withstood a vicious transformation to the rock-salt phase and hindered the diffusion of lithium-ions. [45,46] These results further prove that the BTO-modified helps maintain the bulk structure of nickel-rich cathode.…”

supporting

confidence: 56%

Rational Design of a Piezoelectric BaTiO₃ Nanodot Surface‐Modified LiNi_0.6Co_0.2Mn_0.2O₂ Cathode Material for High‐Rate Lithium‐Ion Batteries

Wang

et al. 2020

ChemElectroChem

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Nickel‐rich cathode materials have been regarded as the most promising candidates for lithium‐ion batteries because of their superior specific capacity and cost‐effectiveness. However, the rapid capacity fade under high current density and serious side reactions during long‐term cycling hinder its wide application. In this study, piezoelectric BaTiO3 nanodots are employed as a functional coating layer on the LiNi0.6Co0.2Mn0.2O2 cathode material to balance the relationship between structure and performance. A three‐phase interface model is proposed including the LiNi0.6Co0.2Mn0.2O2 cathode material, uniform piezoelectric BaTiO3 nanodots, and the electrolyte. The coating layer plays a key role in the rapid diffusion of lithium‐ions as well as stabilizing the bulk structure of the cathode materials. Furthermore, the possible by‐products generated during the electrochemical cycling that can be alleviated by the modification of BaTiO3 are detected by using differential electrochemical mass spectrometry. As expected, our strategy efficiently improves the structural stability and holds a high‐rate performance.

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supporting

confidence: 56%

Rational Design of a Piezoelectric BaTiO₃ Nanodot Surface‐Modified LiNi_0.6Co_0.2Mn_0.2O₂ Cathode Material for High‐Rate Lithium‐Ion Batteries

Wang

et al. 2020

ChemElectroChem

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“…The inner part transferred into LiInO 2 , and the outer coating layer In 2 O 3 after calcination (Figures 7C and 7D). [ 75 ] All three works formed a mechanical protection layer with RLCs removed at the same time. In particular, the coating layer that Park et al .…”

Section: Methods To Eliminate Residual Lithium Compoundsmentioning

confidence: 99%

Strategies of Removing Residual Lithium Compounds on the Surface of Ni‐Rich Cathode Materials^†

Chen

et al. 2020

Chin. J. Chem.

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Ni-rich cathode materials have become one of the most promising cathode materials for advanced high-energy Li-ion batteries (LIBs) owing to their high specific capacity. However, Ni-rich cathode materials are sensitive to the trace H2O and CO2 in the air, and tend to react with them to generate LiOH and Li2CO3 at the particle surface region (named residual lithium compounds, labeled as RLCs). The RLCs will deteriorate the comprehensive performances of Ni-rich cathode materials and make trouble in the subsequent manufacturing process of electrode, including causing low initial coulombic efficiency and poor storage property, bringing about potential safety hazards, and gelatinizing the electrode slurry. Therefore, it is of considerable significance to remove the RLCs. Researchers have done a lot of work on the corresponding field, such as exploring the formation mechanism and elimination methods. This paper investigates the origin of the surface residual lithium compounds on Ni-rich cathode materials, analyzes their adverse effects on the performance and the subsequent electrode production process, and summarizes various kinds of feasible methods for removing the RLCs. Finally, we propose a new research direction of eliminating the lithium residuals after comparing and summing up the above. We hope this work can provide a reference for alleviating the adverse effects of residual lithium compounds for Ni-rich cathode materials' industrial production. Yuefeng Su (left) is a professor in School of Materials Science and Engineering at Beijing Institute of Technology (BIT). In 2013, he was awarded New Century Excellent Talents in University from the Chinese Ministry of Education. His research group mainly engaged in green secondary batteries and advanced energy materials, including lithium-rich cathode materials, nickel-rich cathode materials, and other high-power energy storage devices. Linwei Li (middle) is currently a graduate student under the supervision of Prof. Yuefeng Su in School of Materials Science and Engineering at Beijing Institute of Technology. Her research focuses on the synthesis and performance improvement of Ni-rich cathode materials for lithium-ion batteries. Gang Chen (right) is currently a Ph.D. candidate under the supervision of Prof. Yuefeng Su in School of Materials Science and Engineering at Beijing Institute of Technology. His major research includes the design and synthesis of Ni-rich cathode materials for high-performance lithium-ion batteries, especially for the interfacial design and its mechanism research of Ni-rich materials.

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“…The high-nickel NCM ternary cathode material has a-NaFeO 2 structure; the space group is hexagonal R-3m; Li + is embedded in the layered structure of transition metal and oxygen atoms and inserted and extracted in the 2D gap (Li et al, 2014 ; Liu Y. et al, 2019 ). In high-nickel type LNCM cathode materials, Ni 2+ and Li + are prone to cation mixing (Yang et al, 2019b ).…”

Section: Study On the Surface And Interface Structure Of High-nickel mentioning

confidence: 99%

Research Progress on the Surface of High-Nickel Nickel–Cobalt–Manganese Ternary Cathode Materials: A Mini Review

Song

Xiao

et al. 2020

Front. Chem.

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To address increasingly prominent energy problems, lithium-ion batteries have been widely developed. The high-nickel type nickel-cobalt-manganese (NCM) ternary cathode material has attracted attention because of its high energy density, but it has problems such as cation mixing. To address these issues, it is necessary to start from the surface and interface of the cathode material, explore the mechanism underlying the material's structural change and the occurrence of side reactions, and propose corresponding optimization schemes. This article reviews the defects caused by cation mixing and energy bands in high-nickel NCM ternary cathode materials. This review discusses the reasons why the core-shell structure has become an optimized high-nickel ternary cathode material in recent years and the research progress of core-shell materials. The synthesis method of high-nickel NCM ternary cathode material is summarized. A good theoretical basis for future experimental exploration is provided.

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Enhancement on structural stability of Ni-rich cathode materials by in-situ fabricating dual-modified layer for lithium-ion batteries

Cited by 223 publications

References 49 publications

Rational Design of a Piezoelectric BaTiO₃ Nanodot Surface‐Modified LiNi_0.6Co_0.2Mn_0.2O₂ Cathode Material for High‐Rate Lithium‐Ion Batteries

Rational Design of a Piezoelectric BaTiO₃ Nanodot Surface‐Modified LiNi_0.6Co_0.2Mn_0.2O₂ Cathode Material for High‐Rate Lithium‐Ion Batteries

Strategies of Removing Residual Lithium Compounds on the Surface of Ni‐Rich Cathode Materials^†

Research Progress on the Surface of High-Nickel Nickel–Cobalt–Manganese Ternary Cathode Materials: A Mini Review

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Enhancement on structural stability of Ni-rich cathode materials by in-situ fabricating dual-modified layer for lithium-ion batteries

Cited by 223 publications

References 49 publications

Rational Design of a Piezoelectric BaTiO3 Nanodot Surface‐Modified LiNi0.6Co0.2Mn0.2O2 Cathode Material for High‐Rate Lithium‐Ion Batteries

Rational Design of a Piezoelectric BaTiO3 Nanodot Surface‐Modified LiNi0.6Co0.2Mn0.2O2 Cathode Material for High‐Rate Lithium‐Ion Batteries

Strategies of Removing Residual Lithium Compounds on the Surface of Ni‐Rich Cathode Materials†

Research Progress on the Surface of High-Nickel Nickel–Cobalt–Manganese Ternary Cathode Materials: A Mini Review

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Rational Design of a Piezoelectric BaTiO₃ Nanodot Surface‐Modified LiNi_0.6Co_0.2Mn_0.2O₂ Cathode Material for High‐Rate Lithium‐Ion Batteries

Rational Design of a Piezoelectric BaTiO₃ Nanodot Surface‐Modified LiNi_0.6Co_0.2Mn_0.2O₂ Cathode Material for High‐Rate Lithium‐Ion Batteries

Strategies of Removing Residual Lithium Compounds on the Surface of Ni‐Rich Cathode Materials^†