%0 Journal Article
%T Rational Design of Hierarchical Titanium Nitride[email protected] Pentoxide Core每Shell Heterostructure Fibrous Electrodes for High-Performance 1.6 V Nonpolarity Wearable Supercapacitors
%J -
%D 2018
%R https://doi.org/10.1021/acsami.8b11997
%X Extensive progress has been made in fiber-shaped asymmetric supercapacitors (FASCs) for portable and wearable electronics. However, positive and negative electrodes must be distinguished and low energy densities are a crucial challenge and thus limit their practical applications. This paper reports an efficient method to directly grow TiN nanowire [email protected]2O5 nanosheets core每shell heterostructures on carbon nanotube fibers as nonpolarity electrodes. Benefiting from their unique heterostructure, single electrodes possess high specific capacitances of 195.1 and 230.7 F cm每3 as positive and negative electrodes, respectively. Furthermore, all-solid-state nonpolarity FASC devices with a maximum voltage of 1.6 V were successfully fabricated. Our devices achieve an outstanding specific capacitance of 74.25 F cm每3 and a remarkable energy density of 26.42 mW h cm每3. More importantly, their electrochemical performance changed negligibly regardless of whether the charge每discharge process is in positive or negative direction, indicating excellent nonpolarity. Therefore, these high-performance nonpolarity FASCs pave the way for next-generation wearable energy storage devices
%U https://pubs.acs.org/doi/10.1021/acsami.8b11997