Internal−External Carbon Nanotube Network-Reinforced Ultrathin Birnessite-Type MnO2 Electrodes with Improved Mass Loading and Areal Energy Density
High-mass-loading electrodes are pivotal to the economic feasibility and practical application of energy storage devices. In this work, strip-shaped bath flower-like birnessite nanostructures (SBFB) grown on carbon nanotubes (CNTs) with ultrathin birnessite films (∼3 nm) were synthesized via a low-temperature and alk...