The research team developed a new method to produce an irregular hierarchical-porous polymer material with exceptional thermoelectric properties.[1][3] The material consists of Ag₂Se airgel coated with a polyimide (PI) polymer, which gives it flexibility and mechanical resistance.[1][3] The polyimide coating is approximately 10 to 20 nanometers thick and maintains the electrical conductivity of the airgel, with a maximum deviation of measured thermoelectric parameters of only 3.6 percent.[3] During mechanical durability tests, the airgel showed an initial drag reduction of 12 percent at the start of the cycle, but then maintained exceptional stability with less than 3 percent variation over 100 cycles.[1][3] The material retained almost full shape recovery with minimal hysteresis, making it suitable for flexible electronics on curved surfaces.[1][3] This technology opens up possibilities for self-powered wearable electronics and energy harvesting from heat.[1]