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

Abstract

Abstract 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.