Unprecedented Multifunctionality in 1D Nb 1‐ x Ta x S 3 Transition Metal Trichalcogenide Alloy
Unprecedented Multifunctionality in 1D Nb 1‐ x Ta x S 3 Transition Metal Trichalcogenide Alloy
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DOI：
10.1002/adfm.202205214
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发表时间：
2022-06
影响因子：
19
通讯作者：
Z. Hemmat;Alireza Ahmadiparidari;Shuxi Wang;Khagesh Kumar;Michael Zepeda;Chengji Zhang;Naveen K. Dandu;Sina Rastegar;Leily Majidi;Ahmad Q Jaradat;Anh Ngo;K. Thornton;L. Curtiss;J. Cabana;Zhehao Huang;A. Salehi‐khojin
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文献类型：
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作者：
Z. Hemmat;Alireza Ahmadiparidari;Shuxi Wang;Khagesh Kumar;Michael Zepeda;Chengji Zhang;Naveen K. Dandu;Sina Rastegar;Leily Majidi;Ahmad Q Jaradat;Anh Ngo;K. Thornton;L. Curtiss;J. Cabana;Zhehao Huang;A. Salehi‐khojin
一维材料，如纳米纤维或纳米带，被认为是未来现代电气和电化学设备小型化的极限。在这里，首次成功地合成了固溶体过渡金属三卤化物(TMTC)的纳米纤维，Nb1-xTaxS3，具有出色的电、热和电化学特性，在每种应用中都能与最先进的材料的性能相媲美。这种材料表现出几乎不变的方块电阻(≈740Ω−1)与弯曲循环测试长达90次，在环境条件下测试长达60天的稳定方块电阻，非常高的≈30 mA/cm−2的电击穿电流密度，连续电荷密度波转变的强有力证据，以及高达≈800 kK的出色热稳定性。此外，该材料表现出出色的活性和选择性，将二氧化碳转化为CO达到≈350mA/cm−2at−0.8GV与RHE0.8GV，周转频率为25。在电流密度为0.3 mA/cm−2下的高倍率锂空气电池中也表现出了优异的性能。本研究揭示了一维TMTC合金在广泛应用中的多功能性，为下一代低维材料的设计开辟了新的方向。
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 CO2conversion to CO reaching ≈350 mA cm−2at −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−1at 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.