Selective TiO<sub>2</sub> Nanolayer Coating by Polydopamine Modification for Highly Stable Ni‐Rich Layered Oxides

Kim, Hyeongwoo; Jang, Ji-Hye; Byun, Dongjin; Choi, Wonchang

doi:10.1002/cssc.201902998

Cited by 49 publications

(26 citation statements)

References 58 publications

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“…Moreover, when analyzing the crystal structure of the ONCM 811 particles in the bulk and the near‐surface region (Figure 6b), the resulting FFT patterns confirm that the layered ( R‐ 3 m ) structure is retained. [ 9c,27 ] Differently, for the cycled NCM 811 particles (Figure 6d), the FFT patterns reveal the transition from the layered ( R‐ 3 m ) structure to the rock‐salt ( Fm‐ 3 m ) structure [ 28 ] in the near‐surface region (red frame) and a mix of the two crystalline phases in the bulk (orange frame). It is noteworthy that the transition from the layered to the electrochemically inactive rock‐salt structure [ 9c ] appears complete for several tens of nanometers from the particle surface toward the particle core, providing an explanation for the pronounced capacity fading in the case of NCM 811 .…”

Section: Resultsmentioning

confidence: 99%

Lithium Phosphonate Functionalized Polymer Coating for High‐Energy Li[Ni_0.8Co_0.1Mn_0.1]O₂ with Superior Performance at Ambient and Elevated Temperatures

Chen

Nguyen

Zarrabeitia

et al. 2021

Adv Funct Materials

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High-energy Ni-rich lithium transition metal oxides such as Li[Ni 0.8 Co 0.1 Mn 0.1 ]O 2 (NCM 811 ) are appealing positive electrode materials for next-generation lithium batteries. However, the high sensitivity toward moist air during storage and the high reactivity with common organic electrolytes, especially at elevated temperatures, are hindering their commercial use. Herein, an effective strategy is reported to overcome these issues by coating the NCM 811 particles with a lithium phosphonate functionalized poly(aryl ether sulfone). The application of this coating allows for a substantial reduction of lithiumbased surface impurities (e.g., LiOH, Li 2 CO 3 ) and, generally, the suppression of detrimental side reactions upon both storage and cycling. As a result, the coated NCM 811 -based cathodes reveal superior Coulombic efficiency and cycling stability at ambient and, particularly, at elevated temperatures up to 60 °C (a temperature at which the non-coated NCM 811 electrodes rapidly fail) owing to the formation of a stable cathode electrolyte interphase with enhanced Li + transport kinetics and the well-retained layered crystal structure. These results render the herein presented coating strategy generally applicable for high-performance lithium battery cathodes.

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Section: Resultsmentioning

confidence: 99%

Lithium Phosphonate Functionalized Polymer Coating for High‐Energy Li[Ni_0.8Co_0.1Mn_0.1]O₂ with Superior Performance at Ambient and Elevated Temperatures

Chen

Nguyen

Zarrabeitia

et al. 2021

Adv Funct Materials

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“…Compared with the conventional hydrolysis synthesis, TiO 2 nanocrystallites generated by this method can be uniformly dispersed in the pores of DMSNs without pore blocking due to the homogeneous distribution of Ti elements on DMSNs@PDA-Ti 4+ . Besides, the PDA template may contribute to maintaining the structure stability of porous metal oxides during calcination so that the TiO 2 nanocrystallites grow uniformly into ordered mesoporous nanoshells, instead of independent or agglomerated particles.…”

Section: Resultsmentioning

confidence: 99%

Hierarchical Dendritic Mesoporous TiO₂ Nanocomposites for Highly Selective Enrichment of Endogenous Phosphopeptides

Zhao

Hong

et al. 2021

ACS Sustainable Chem. Eng.

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The uniform growth of metal oxides into mesoporous nanostructures with controllable orientations is challenging but of significance. Here, a polydopamine (PDA)-induced oriented growth strategy is proposed to uniformly grow metal ions into mesoporous metal oxides with controllable orientation. Two mesoporous nanostructures (3D hierarchical dendritic nanostructures and 2D nanosheets) were constructed by this strategy. It is worth emphasizing that the 3D hierarchical mesoporous nanostructures (DMSNs@TiO2) are formed by constructing single-layered porous TiO2 in dendritic mesoporous tunnels, which is different from the previously reported generation of hierarchical pores inside frameworks or accumulation of various channels. In such a pore system, small pores are connected by large pores, thereby enhancing the accessibility of pores. DMSNs@TiO2 with a large surface area and connected hierarchical pore structure exhibit highly improved phosphopeptide enrichment performance compared with commercial TiO2 and single-pored TiO2. Especially for real samples such as human saliva, DMSNs@TiO2 captured 49 endogenous phosphopeptides from 1 μL of saliva, demonstrating their broad prospects in phosphopeptidomics analysis.

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“…For example, Kim et al . [ 159 ] treated the NCM622 materials with polydopamine before coating the TiO 2 on the particles. The Ti(OEt) 4 molecules would be attracted by the OH catechol group in the polydopamine layer, thus forming a thin but uniform TiO 2 coating layer after the annealing treatment.…”

Section: Applications Of Coating In Ni‐rich Materialsmentioning

confidence: 99%

Advances and Prospects of Surface Modification on Nickel‐Rich Materials for Lithium‐Ion Batteries^†

Chen

Lai

et al. 2020

Chin. J. Chem.

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Although layered Ni-rich cathode materials have attracted lots of attention for their high capacity and power density, several significant issues, such as poor thermal stability and moderate cyclability, limit their practical applications. Most of these undesired problems of Ni-rich materials are caused by the unstable surface or the parasitic reactions at cathode-electrolyte interface. Surface coating is the most common method to suppress such interfacial problems for Ni-rich materials. This review focuses on the surface engineering of the Ni-rich materials in recent years, including the species used in coating, synthetic strategies of uniform coating layer, and the positive effects of coating species on the active materials. Detailed discussions are also taken to describe the formation mechanism of the surface coating layer with design philosophy. Finally, the prospects for further developments and challenges in surface coating are also summarized. Yuefeng Su (left) is a professor in the 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 the research of green secondary batteries and advanced energy materials, including lithium-rich cathode materials, nickel-rich cathode materials and other high-power energy storage devices. As the principal investigator, Prof. Su successfully hosted the National Key Research and National Natural Science Foundation of China, etc. Gang Chen (middle) is currently a Ph.D. candidate under the supervision of Prof. Yuefeng Su in the 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. Lai Chen (right) obtained his Ph.D. majoring in Environmental Engineering from Beijing Institute of Technology (BIT) in 2017, and is currently an associate professor at the school of Materials Science and Engineering at BIT. As the principal investigator, he has successfully hosted the

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Selective TiO₂ Nanolayer Coating by Polydopamine Modification for Highly Stable Ni‐Rich Layered Oxides

Cited by 49 publications

References 58 publications

Lithium Phosphonate Functionalized Polymer Coating for High‐Energy Li[Ni_0.8Co_0.1Mn_0.1]O₂ with Superior Performance at Ambient and Elevated Temperatures

Lithium Phosphonate Functionalized Polymer Coating for High‐Energy Li[Ni_0.8Co_0.1Mn_0.1]O₂ with Superior Performance at Ambient and Elevated Temperatures

Hierarchical Dendritic Mesoporous TiO₂ Nanocomposites for Highly Selective Enrichment of Endogenous Phosphopeptides

Advances and Prospects of Surface Modification on Nickel‐Rich Materials for Lithium‐Ion Batteries^†

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Selective TiO2 Nanolayer Coating by Polydopamine Modification for Highly Stable Ni‐Rich Layered Oxides

Cited by 49 publications

References 58 publications

Lithium Phosphonate Functionalized Polymer Coating for High‐Energy Li[Ni0.8Co0.1Mn0.1]O2 with Superior Performance at Ambient and Elevated Temperatures

Lithium Phosphonate Functionalized Polymer Coating for High‐Energy Li[Ni0.8Co0.1Mn0.1]O2 with Superior Performance at Ambient and Elevated Temperatures

Hierarchical Dendritic Mesoporous TiO2 Nanocomposites for Highly Selective Enrichment of Endogenous Phosphopeptides

Advances and Prospects of Surface Modification on Nickel‐Rich Materials for Lithium‐Ion Batteries†

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Product

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Selective TiO₂ Nanolayer Coating by Polydopamine Modification for Highly Stable Ni‐Rich Layered Oxides

Lithium Phosphonate Functionalized Polymer Coating for High‐Energy Li[Ni_0.8Co_0.1Mn_0.1]O₂ with Superior Performance at Ambient and Elevated Temperatures

Lithium Phosphonate Functionalized Polymer Coating for High‐Energy Li[Ni_0.8Co_0.1Mn_0.1]O₂ with Superior Performance at Ambient and Elevated Temperatures

Hierarchical Dendritic Mesoporous TiO₂ Nanocomposites for Highly Selective Enrichment of Endogenous Phosphopeptides

Advances and Prospects of Surface Modification on Nickel‐Rich Materials for Lithium‐Ion Batteries^†