Nonvolatile ionogels have recently emerged as promising soft electrolyte materials for use in flexible electronics. However, it remains challenging to fabricate highly robust and stable transparent ionogels. Here, high-performance ionogels with excellent transparency, mechanical robustness, and ultrahigh stability are designed by virtue of hydrogen bonding between poly(ethyl acrylate)-based elastomers and room-temperature ionic liquids (ILs). Through rationally tuning the chemical structures of ILs and thus achieving good compatibility of ILs with elastomers, the transparent hydrophobic ionogels exhibit super-strong mechanical properties (favorable elasticity of 15–484 kPa, ultrahigh stretchability of more than 5000%, and record-high fracture toughness of up to 4.7 kJ m⁻²) and high stability (high thermal stability, high voltage stability, air stability, humidity resistance, strong self-adhesion, and non-corrosive stability). In particular, it is demonstrated that a skin-like sensor fabricated using the ionogel directly not only exhibits outstanding durability (10 000 cycles at 100% strain), but is also capable of operation under harsh environmental conditions, including high vacuum, high/low temperatures, and high humidity. It is believed that this work provides new prospects for sophisticated wearable optoelectronic devices.

中文翻译：

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透明，机械坚固且超稳定的离子凝胶，通过弹性体和离子液体之间的氢键作用实现

近来，非挥发性离子凝胶已经成为有希望的用于柔性电子设备的软电解质材料。然而，制造高度坚固和稳定的透明离子凝胶仍然具有挑战性。在这里，借助于聚（丙烯酸乙酯）基弹性体和室温离子液体（IL）之间的氢键，设计了具有优异透明度，机械强度和超高稳定性的高性能离子凝胶。通过合理地调节离子液体的化学结构，从而实现离子液体与弹性体的良好相容性，透明疏水离子凝胶具有超强的机械性能（15-484 kPa的良好弹性，超过5000％的超高拉伸性以及创纪录的高断裂韧性高达4.7 kJ m ^-2）和高稳定性（高热稳定性，高电压稳定性，空气稳定性，耐湿性，强自粘力和非腐蚀稳定性）。特别是，已证明直接使用离子凝胶制造的皮肤状传感器不仅具有出色的耐用性（在100％应变下可进行10000次循环），而且还能够在包括高真空，高/低温度在内的恶劣环境条件下运行温度和高湿度。相信这项工作为复杂的可穿戴光电设备提供了新的前景。