Universally Applicable and Ultra‐Long Life Cyclic Power Generation Induced by Interfacial Ion‐Oscillation

Sustainable energy supply without relying on external power sources is one of the bottlenecks in achieving self-supportive wearable electronics and Internet-of-things (IoT) systems. Here a new type of universally applicable and ultra-long life cyclic power generation is developed induced by interfacial redox reaction-mediated ion-oscillation, which can provide cycling electric energy in a self-charging manner without extra pre-charge. Based on asymmetric manganese dioxide and molybdenum disulfide electrode pairs, the proof-concept electric potential difference power generating cell (EPDC) offers ultra-long life electric output over 8-month testing period for tens of thousands of cycles. A layer-stacking EPDC unit supplies a high direct current of more than 40 mA and a power density of ≈6 W m^-2. Such recyclable power-generating process mainly relies on reversible ion migration at an asymmetric interface in response to relative variation of electric potentials. The universal applicability of EPDC is validated by a combination of diverse electrode pairs. Large-scale manufacture of EPDCs is achievable by industry-compatible auto-blade coating technology with on-demand power output, providing a long-acting power supply platform for self-charging electronic systems.