摘要
氢气的高精度监测对于确保锂离子电池储能系统的早期预警安全性具有重要意义,二维(2D)材料因其大表面积和卓越的电导率,在气体感测领域展现出巨大潜力。MXene(Ti_(3)C_(2)Tx)作为一种新兴的2D材料,其表面的含氧官能团或表面缺陷能吸附氢并改变电阻,但制备Ti_(3)C_(2)薄膜时,相邻的Ti_(3)C_(2)层之间因强烈的范德华力和氢键相互作用而容易堆叠,这阻碍了离子传输,降低了比表面积和可用活性位点。为克服这一难题,研究通过将金属有机框架(Co-MOF)负载在Ti_(3)C_(2)上,通过层层堆叠自组装制备出了自支撑Co-MOF/Ti_(3)C_(2)复合薄膜。研究表明,Co-MOF具有丰富的活性位点和独特的孔隙结构,与Ti_(3)C_(2)复合后,不仅有效缓解了Ti_(3)C_(2)层的自堆叠问题,还显著提高了材料的比表面积(达到274m2/g),增加了氢气分子的吸附活性位点。这种复合材料兼具Co-MOF的高敏感性和Ti_(3)C_(2)的高导电性,实现了对氢气浓度的快速响应和高灵敏度传感,在实现锂离子电池储能系统规模化应用安全早期预警中展现出广阔的应用前景。
Hydrogen detection is of great significance for ensuring energy safety,and two-dimensional(2D)materials have shown great potential in the field of gas sensing due to their large surface area and excellent electrical conductivity.MXene(Ti_(3)C_(2)Tx),as an emerging 2D material,can adsorb hydrogen through its surface oxygen-containing functional groups or surface defects,thereby changing its resistance.However,during the preparation of Ti_(3)C_(2)thin films,adjacent Ti_(3)C_(2)layers are prone to stacking due to strong van der Waals forces and hydrogen bonding interactions,which hinders ion transport and reduces the surface area and available active sites.To overcome this challenge,a self-supporting Co-MOF/Ti_(3)C_(2)composite flm was prepared by loading metal-organic framework(Co-MOF)onto Ti_(3)C_(2).Co-MOF,with its abundant active sites and unique pore structure,not only effectively alleviates the self-stacking of Ti_(3)C_(2)layers but also significantly increases the specific surface area of the material(up to 274 m/g),thereby enhancing the adsorption active sites for hydrogen molecules.This composite material combines the high sensitivity of Co-MOF and the high conductivity of Ti_(3)C_(2),achieving rapid response and high-sensitivity sensing of hydrogen concentration,and exhibiting broad application prospects in the field of hydrogen sensing.
作者
曹阳
CAO Yang(State Grid East Inner Mongolia Electric Power Supply Co.,Ltd.,Hohhot 010000,Inner Mongolia,China)
出处
《合成材料老化与应用》
2024年第6期54-58,共5页
Synthetic Materials Aging and Application
基金
国网内蒙古东部电力有限公司科技项目(SGMDTL00YWJS2100711)。
