Transparent and Flexible Mn_1−x−y(Ce_xLa_y)O_2−δ Ultrathin‐Film Device for Highly‐Stable Pseudocapacitance Application

Control over the fabrication of state‐of‐the‐art portable pseudocapacitors with the desired transparency, mechanical flexibility, capacitance, and durability is challenging, but if resolved will have fundamental implications. Here, defect‐rich Mn 1− x − y (Ce x La y )O 2−δ ultrathin films with controllable thicknesses (5–627 nm) and transmittance (≈29–100%) are fabricated via an electrochemical chronoamperometric deposition using a aqueous...