Achieving high stability and durability in triboelectric energy harvesting while maintaining the output performance is a significant challenge, particularly through an environmentally friendly, scalable approach. Inspired by the domed biological architecture of jellyfish, a self-standing and self-encapsulated dome architectured triboelectric nanogenerator (DTENG) is developed using an innovative, environmentally sustainable one-step periphery-constrained foaming (PCF) approach. In PCF, the pressure release caused foam expansion, and the peripheral constraint caused an uneven expansion of the foam, which resulted in a macro-dome architecture. Given the self-standing and self-encapsulated configuration and dome structure, the optimum DTENG demonstrated a high Voc of 263 V, a power density of 107.7 mW m−2, and exceptional stability and durability. Moreover, owing to its rugged configuration and closed construction, the DTENG demonstrated high durability over 60 000 cycles and resistance to harsh conditions, such as ultraviolet exposure, temperature, and corrosion. The DTENG passed stability tests for continuous underwater operation, and after being run over by a vehicle. Based on these performance advantages, the DTENG shows great potential for self-powered sensing in harsh environments, and is designed to achieve autonomous control and real-time monitoring of water flow. This study provides a new strategy for the scalable and sustainable development of biomimetic TENGs with excellent performance and durability.