Printable hexagonal boron nitride ionogels,Faraday Discussions

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Printable hexagonal boron nitride ionogels
Faraday Discussions ( IF 3.3 ) Pub Date : 2020-1-15 , DOI: 10.1039/c9fd00113a
Woo Jin Hyun _{1,

2,

3,

4} , Lindsay E. Chaney _{1,

2,

3,

4} , Julia R. Downing _{1,

2,

3,

4} , Ana C. M. de Moraes _{1,

2,

3,

4} , Mark C. Hersam _{1,

2,

3,

4,

5}

Affiliation

Due to its excellent chemical/thermal stability and mechanical robustness, hexagonal boron nitride (hBN) is a promising solid matrix material for ionogels. While bulk hBN ionogels have been employed in macroscopic applications such as lithium-ion batteries, hBN ionogel inks that are compatible with high-resolution printing have not yet been realized. Here, we describe aerosol jet-printable ionogels using exfoliated hBN nanoplatelets as the solid matrix. The hBN nanoplatelets are produced from bulk hBN powders by liquid-phase exfoliation, allowing printable hBN ionogel inks to be formulated following the addition of an imidazolium ionic liquid and ethyl lactate. The resulting inks are reliably printed with variable patterns and controllable thicknesses by aerosol jet printing, resulting in hBN ionogels that possess high room-temperature ionic conductivities and storage moduli of >3 mS cm⁻¹ and >1 MPa, respectively. By integrating the hBN ionogel with printed semiconductors and electrical contacts, fully-printed thin-film transistors with operating voltages below 1 V are demonstrated on polyimide films. These devices exhibit desirable electrical performance and robust mechanical tolerance against repeated bending cycles, thus confirming the suitability of hBN ionogels for printed and flexible electronics.

中文翻译：

可印刷六角形氮化硼离子凝胶

由于六方氮化硼（hBN）具有出色的化学/热稳定性和机械强度，因此它是用于离子凝胶的有前途的固体基质材料。尽管块状hBN离子凝胶已被用于宏观应用中，例如锂离子电池，但尚未实现与高分辨率打印兼容的hBN离子凝胶油墨。在这里，我们描述了使用脱落的hBN纳米片作为固体基质的气溶胶可喷射印刷的离子凝胶。hBN纳米片是通过液相剥落法从块状hBN粉末中制备的，允许在添加咪唑鎓离子液体和乳酸乙酯后配制可印刷的hBN离子凝胶油墨。通过气溶胶喷射印刷，可以可靠地以可变的图案和可控制的厚度印刷所得的油墨，^-1和> 1 MPa。通过将hBN离子凝胶与印刷半导体和电触点集成在一起，在聚酰亚胺薄膜上展示了工作电压低于1 V的全印刷薄膜晶体管。这些设备表现出理想的电气性能和对重复弯曲周期的强大机械耐受性，从而证实了hBN离子凝胶对印刷和柔性电子产品的适用性。

更新日期：2020-01-15

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