一种低温操作合成具有增强热稳定性和电化学性能的碳化钛改性碳纳米管的方法。
A low-temperature operated synthesis of TiC-modified carbon nanotubes with enhanced thermal stability and electrochemical properties.
作者信息
Du Huanhuan, Wang Yurong, Xiao Dongyang, Zhang Yili, Hu Fangjing, Sun Leimeng
机构信息
School of Optical and Electronic Information, Huazhong University of Science and Technology Wuhan 430074 China
MOE Key Laboratory of Fundamental Physical Quantities Measurement, Hubei Key Laboratory of Gravitation and Quantum Physics, PGMF, School of Physics, Huazhong University of Science and Technology Wuhan 430074 China
出版信息
Nanoscale Adv. 2022 May 10;4(11):2444-2451. doi: 10.1039/d2na00059h. eCollection 2022 May 31.
Carbon nanotubes (CNTs) with superior thermal and electrochemical properties are desirable for a large variety of applications. Herein, an synthesis carried out at 1050 °C is proposed for the realization of titanium carbide (TiC) modified CNTs (TiC@CNTs) a carbothermal treatment of the TiO-coated CNTs deposited by a TALD technology, preserving the structural morphologies of CNT samples. Crystalline and amorphous TiC layers/nanoparticles are observed around the walls of CNTs, serving as a thermal insulation layer to enhance the thermal stability of CNTs. The TiC@CNT sample exhibits a minimal mass loss of 3.1%, which is 20.9% and 82.3% for the TiO@CNT and pristine-CNT samples, respectively. In addition, the TiC@CNT electrode shows good energy storage performances, with a specific capacitance of 2.83 mF cm at 20 μA cm, which is about 3.5 times higher than that of the pristine-CNT electrode, showing the potential of TiC@CNTs as next-generation electrode materials.
具有卓越热性能和电化学性能的碳纳米管（CNTs）在众多应用中备受青睐。在此，我们提出一种在1050℃下进行的合成方法，通过对采用热辅助激光沉积（TALD）技术沉积的TiO包覆碳纳米管进行碳热处理，来实现碳化钛（TiC）修饰的碳纳米管（TiC@CNTs），同时保留碳纳米管样品的结构形态。在碳纳米管管壁周围观察到结晶态和非晶态的TiC层/纳米颗粒，它们作为隔热层增强了碳纳米管的热稳定性。TiC@CNT样品的质量损失最小，为3.1%，而TiO@CNT样品和原始碳纳米管样品的质量损失分别为20.9%和82.3%。此外，TiC@CNT电极表现出良好的储能性能，在20 μA/cm²时的比电容为2.83 mF/cm²，约为原始碳纳米管电极的3.5倍，显示出TiC@CNTs作为下一代电极材料的潜力。
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