High-performance and reliable electrochromic supercapacitors (ECSs) have been developed using tungsten trioxide (WO3) and nickel oxide (NiO) films. The balance between anode and cathode materials was optimized by adjusting the thickness of the NiO film while maintaining the WO3 film at around 660 nm. Additionally, doping the NiO film with small amounts of metals, such as copper, significantly enhanced the electrical conductivity and electrochemical activity. At a copper doping level of 7 mol %, the ECS demonstrated outstanding performance, including a high areal capacitance of approximately 14.9 mF/cm², excellent coulombic efficiency of around 99%, a wide operating temperature range from 0 to 80 °C, and reliable operation with over 10,000 charging/discharging cycles. The device also showed good self-discharging durability and synchronized transmittance changes with the energy storage status. These features highlight the ECS as a promising energy storage solution for future electronics.-Scientific Journal cover design by scapiens
[Scientific Journal cover design] Low-Thermal-Budget Fluorite-Structure Ferroelectrics for Future Electronic Device Applications
In article number 2100028, Jiyoung Kim, Si Joon Kim, and their team review key factors involved in developing fluorite-structure ferroelectrics
