A triboelectric nanogenerator (TENG), fabricated by soft materials with advantages of flexibility, stretchability, and water resistance, is a potential means for biomechanical energy harvesting. Herein, a soft tubular TENG (ST‐TENG) is proposed, which is composed of a flexible conductive sponge as the inner electrode and a soft silicone tube as the dielectric layer with the helix outer electrode. The ST‐TENG can be built in outsoles and harvest various biomechanical energy including pressing, bending, and twisting. The output performance of ST‐TENG was thoroughly investigated and the surface charge density can reach to 175.4 µC m−2. The ST‐TENG has stable and durable characteristics for 1.2 × 106 working cycles, 100 h soaking, and 5000 times bending. By walking or jogging with the ST‐TENG tubes, several portable electronics such as thermometer, digital watch, and calculator can be continuously powered. The soft energy harvester in this work has made a significant progress in self‐powered devices.

Electric power of hundreds of kilowatts can be produced in a few microseconds by sudden release of bound charge on the surface of ferroelectric ceramic through shock wave compression. In order to understand the depolarization process, knowledge of the discharge behavior of ferroelectric ceramic under shock wave compression is essential. Gas-gun facility has been used to investigate the shock-induced depolarization kinetics of tin-modified lead zirconate titanate ferroelectric ceramic. Experiments were conducted in the normal mode in which the shock propagation vector was perpendicular to the remanent polarization. Two kinds of specimens with the ferroelectric-toantiferroelectric transformation hydraulic pressure respectively at 80 MPa and 180 MPa were tested. The output currents as a function of load resistance were measured. A computation model was developed to describe the electrical behavior of PSZT ceramic under shock wave compression, which adequately explained the observed experimental results.

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