Unprecedented Multifunctionality in 1D Nb_1‐xTa_xS₃ Transition Metal Trichalcogenide Alloy

Abstract

1D materials, such as nanofibers or nanoribbons are considered as the future ultimate limit of downscaling for modern electrical and electrochemical devices. Here, for the first time, nanofibers of a solid solution transition metal trichalcogenide (TMTC), Nb1‐xTaxS3, are successfully synthesized with outstanding electrical, thermal, and electrochemical characteristics rivaling the performance of the‐state‐of‐the art materials for each application. This material shows nearly unchanged sheet resistance (≈740 Ω sq−1) versus bending cycles tested up to 90 cycles, stable sheet resistance in ambient conditions tested up to 60 days, remarkably high electrical breakdown current density of ≈30 MA cm−2, strong evidence of successive charge density wave transitions, and outstanding thermal stability up to ≈800 K. Additionally, this material demonstrates excellent activity and selectivity for CO2 conversion to CO reaching ≈350 mA cm−2 at −0.8 V versus RHE with a turnover frequency number of 25. It also exhibits an excellent performance in a high‐rate Li–air battery with the specific capacity of 3000 mAh g−1 at a current density of 0.3 mA cm−2. This study uncovers the multifunctionality in 1D TMTC alloys for a wide range of applications and opens a new direction for the design of the next generation low‐dimensional materials.

Thermodynamics and Kinetics in Anisotropic Growth of One-Dimensional Midentropy Nanoribbons

“…So far, intensive research efforts have been carried out on the applications of unary TMTC materials in nanoscale electronic, optoelectronic, and thermoelectric devices, where outstanding electrical performance, such as high breakdown current density, , large carrier mobility, , and strong photoresponse, as well as robust thermoelectric performance, have been realized. A recent report also indicates that, in the form of alloy structures, TMTCs show much improved properties outperforming their unary counterparts . Despite these advances, the anisotropic growth mechanism of 1D TMTCs for controlling their structures and phases has not been well understood.…”

“…A recent report also indicates that, in the form of alloy structures, TMTCs show much improved properties outperforming their unary counterparts. 19 Despite these advances, the anisotropic growth mechanism of 1D TMTCs for controlling their structures and phases has not been well understood. There is no report on the study of the growth mechanism for 1D TMTC alloys, which is expected to be a complex process.…”

Two-Dimensional van der Waals Material PdPSe: Investigation on Electrical Transport

“…Nevertheless, discovering new materials and exploring their properties remain the backbone of materials science and engineering. Thus, the field of material design and discovering new types of low-dimensional materials retains its potential consistently. − …”