In-situ liquid lubrication with bearing effect on a semi-out-of-plane ordered ternary (TiVCr)3AlC2 MAX at 800 ºC

Du, Zhi; Wang, Chuan‐Chao; Liang, Hongru; Xue, Lili; Xue, Yaqing; Wang, Zijiao; Wang, Xiaomei; Yu, Hong

doi:10.1016/j.jeurceramsoc.2023.08.020

Journal of the European Ceramic Society

2023

DOI: 10.1016/j.jeurceramsoc.2023.08.020

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In-situ liquid lubrication with bearing effect on a semi-out-of-plane ordered ternary (TiVCr)3AlC2 MAX at 800 ºC

Zhi Du

Chuan‐Chao Wang

Hongru Liang

et al.

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2024

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Cited by 5 publications

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Electrostatically Shielded Transportation Enabling Accelerated Na⁺ Diffusivity in High‐Performance Fluorophosphate Cathode for Sodium‐Ion Batteries

Wang,

Jing,

Wang

et al. 2024

Adv Funct Materials

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A typical polyanionic based material Na3V2(PO4)2O2F (Na3VPO2F) attracts much interest as a cathode for large‐scale sodium‐ion batteries in consideration of its stable structure and remarkable energy density. Nevertheless, the large coulombic attraction and repulsion suffered by the mobile Na+ from structural anions and surrounding Na+, respectively, result in a torpid reaction kinetics and inferior rate capability. Herein, Br−‐doped and Na+ vacancy preinstalled Na3−yVPO2−xBrxF is prepared to dilute the charges on and inside the Na+ transportation tunnel. In virtue of density functional theory analysis, Na3−yVPO2−xBrxF reveals a reduction in the bandgap and an increase in electronic conductivity. Meanwhile, the almost electrostatically shielded tunnel in Na3−yVPO2−xBrxF alleviates the coulombic hindrance imposed on Na+ during its (de)intercalation, which demonstrates a Na+ diffusivity about five times higher than that of Na3VPO2F. Consequently, the Na3−yVPO2−xBrxF cathode shows a superior rate capacity of 77.7 mAh g−1 under 50 C and great cycling property corresponding to a high capacity retention of 94.4% over 800 cycles at 10 C. The assembled Na3−yVPO2−xBrxF//hard‐carbon sodium‐ion full‐cell presents excellent specific energy/power (226 Wh kg−1@15424.2 W kg−1) as well as outstanding long‐term cyclic stability over 1000 cycles at 5 C.

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Electrostatically Shielded Transportation Enabling Accelerated Na⁺ Diffusivity in High‐Performance Fluorophosphate Cathode for Sodium‐Ion Batteries

Wang,

Jing,

Wang

et al. 2024

Adv Funct Materials

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Mapping the structure and chemical composition of MAX phase ceramics for their high‐temperature tribological behaviors

Yu,

Xue,

Xue

et al. 2024

Carbon Energy

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MAX phase ceramics is a large family of nanolaminate carbides and nitrides, which integrates the advantages of both metals and ceramics, in general, the distinct chemical inertness of ceramics and excellent physical properties like metals. Meanwhile, the rich chemical and structural diversity of the MAXs endows them with broad space for property regulation. Especially, a much higher self‐lubricity, as well as wear resistance, than that of traditional alloys and ceramics, has been observed in MAXs at elevated temperatures in recent decades, which manifests a great application potential and sparks tremendous research interest. Aiming at establishing a correlation among structure, chemical composition, working conditions, and the tribological behaviors of MAXs, this work overviews the recent progress in their high‐temperature (HT) tribological properties, accompanied by advances in synthesis and structure analysis. HT tribological‐specific behaviors, including the stress responses and damage mechanism, oxidation mechanism, and wear mechanism, are discussed. Whereafter, the tribological behaviors along with factors related to the tribological working conditions are discussed. Accordingly, outlooks of MAX phase ceramics for future HT solid lubricants are given based on the optimization of present mechanical properties and processing technologies.

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Enhanced wear resistance and strength synergy in Ti3AlC2 MAX through in-situ synthesis of nano TiB2 heterostructure

Li,

Liu,

Liu

et al. 2024

International Journal of Refractory Metals and Hard Materials

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In-situ liquid lubrication with bearing effect on a semi-out-of-plane ordered ternary (TiVCr)3AlC2 MAX at 800 ºC

Cited by 5 publications

References 55 publications

Electrostatically Shielded Transportation Enabling Accelerated Na⁺ Diffusivity in High‐Performance Fluorophosphate Cathode for Sodium‐Ion Batteries

Electrostatically Shielded Transportation Enabling Accelerated Na⁺ Diffusivity in High‐Performance Fluorophosphate Cathode for Sodium‐Ion Batteries

Mapping the structure and chemical composition of MAX phase ceramics for their high‐temperature tribological behaviors

Enhanced wear resistance and strength synergy in Ti3AlC2 MAX through in-situ synthesis of nano TiB2 heterostructure

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Product

Resources

About

In-situ liquid lubrication with bearing effect on a semi-out-of-plane ordered ternary (TiVCr)3AlC2 MAX at 800 ºC

Cited by 5 publications

References 55 publications

Electrostatically Shielded Transportation Enabling Accelerated Na+ Diffusivity in High‐Performance Fluorophosphate Cathode for Sodium‐Ion Batteries

Electrostatically Shielded Transportation Enabling Accelerated Na+ Diffusivity in High‐Performance Fluorophosphate Cathode for Sodium‐Ion Batteries

Mapping the structure and chemical composition of MAX phase ceramics for their high‐temperature tribological behaviors

Enhanced wear resistance and strength synergy in Ti3AlC2 MAX through in-situ synthesis of nano TiB2 heterostructure

Contact Info

Product

Resources

About

Electrostatically Shielded Transportation Enabling Accelerated Na⁺ Diffusivity in High‐Performance Fluorophosphate Cathode for Sodium‐Ion Batteries

Electrostatically Shielded Transportation Enabling Accelerated Na⁺ Diffusivity in High‐Performance Fluorophosphate Cathode for Sodium‐Ion Batteries