Interface Static Friction Enabled Ultra‐Durable and High Output Sliding Mode Triboelectric Nanogenerator

Abstract Utilizing the static friction of the rolling rod/ball is an effective strategy to address the mechanical durability in sliding mode triboelectric nanogenerators (TENGs), but its line/point contact seriously reduces the output performance. Herein, a high output and ultra‐durable TENG is achieved by a rolling belt method. Compared with the previous rolling rod mode TENG (R‐TENG), the electric output performance of the rolling belt mode TENG (RB‐TENG) increases nearly 3.8 times. The maximum output power density of RB‐TENG reaches ≈ 280 W m ‐2 with self‐charge excitation and power management, and its charge density is the highest among all sliding mode TENGs without sliding friction including rolling rod/ball mode and noncontact freestanding mode. Furthermore, the RB‐TENG remains nearly 98.5% of its output performance after more than 4 100 000 cycles, which is the highest stability measured in such a long time by now, with material abrasion quality 6.42 µ g·g ‐1 ( < 1% of traditional sliding TENG) every 10 000 cycles. This work provides an effective strategy for solving the bottleneck issues of mechanical abrasion in sliding mode TENGs.