Surface Non‐Equilibrium State Induced by Unipolar Charge Collection for Constructing Constant Current Power Generation

Abstract The construction of stable and continuous output triboelectric nanogenerators (SC‐TENGs) is of importance for the efficient utilization of ambient energy. Although structural optimization and material innovations have facilitated the diversified development of SC‐TENGs, these devices based on the single‐principle design still have limitations in energy harvesting efficiency. Here, a dual‐channel SC‐TENG is realized through the unipolar charge collection and the resulting surface non‐equilibrium state. First, the air breakdown between the side electrode and the tribo‐surface results in a constant current output. Second, the unipolar charge loss on the dielectric surface forms an unbalanced bias voltage, further polarizing the tribo‐material and generating an induced constant current output. Based on the output consistency of bias polarization, the previously complex bottom electrode is replaced with a single electrode, greatly simplifying the manufacturing process. Besides, this structural significantly releases charge, resulting in a 325% increase in total charge output. This work unveils a novel mechanism for achieving constant current output through the construction of surface non‐equilibrium states, paving a new pathway for SC‐TENGs in high‐efficiency energy conversion and multifunctional integrated applications.