With the rapid development of flexible electronics, materials with a single function can no longer meet the increasingly complex application fields, so it is a challenge to design a wearable electronic device with multifunctionality. Here, a polyacrylamide (PAM)-based composite hydrogel doped with black phosphorus (BP) nanosheets is designed, which has excellent conductivity (0.574 S/m), stretchability (>1,000%), transparency, and photothermal properties. In addition, the composite hydrogel is used as an electrode and encapsulated by structured polydimethylsiloxane (PDMS) to construct a multifunctional, hydrogel-based triboelectric nanogenerator (Hy-TENG) with a power density of 149.8 mW m⁻². In addition, because of the photothermal characteristics of BP, the Hy-TENG could be used as a confidential communications device to realize the decryption of temperature-sensitive patterns by infrared light, thereby completing transmission of real information. We hope that the designed Hy-TENG can promote the development of advanced information security systems and provide a direction for future research.

随着柔性电子的快速发展，单一功能的材料已不能满足日益复杂的应用领域，因此设计多功能的可穿戴电子设备是一个挑战。在这里，设计了一种基于聚丙烯酰胺 (PAM) 的掺杂黑磷 (BP) 纳米片的复合水凝胶，它具有优异的导电性 (0.574 S/m)、拉伸性 (>1,000%)、透明度和光热性能。此外，该复合水凝胶被用作电极并被结构化聚二甲基硅氧烷（PDMS）封装，构建了一个多功能的、基于水凝胶的摩擦纳米发电机（Hy-TENG），功率密度为149.8 mW m ^-2. 此外，由于BP的光热特性，Hy-TENG可作为保密通信设备，实现红外光对温度敏感图案的解密，从而完成真实信息的传输。我们希望所设计的 Hy-TENG 能够促进先进信息安全系统的发展，并为未来的研究提供方向。