title: Symmetrical MnO2-carbon nanotube-textile nanostructures for wearable pseudocapacitors with high mass loading.
abstract: While MnO(2) is a promising material for pseudocapacitor applications due to its high specific capacity and low cost, MnO(2) electrodes suffer from their low electrical and ionic conductivities. In this article, we report a structure where MnO(2) nanoflowers were conformally electrodeposited onto carbon nanotube (CNT)-enabled conductive textile fibers. Such nanostructures effectively decrease the ion diffusion and charge transport resistance in the electrode. For a given areal mass loading, the thickness of MnO(2) on conductive textile fibers is much smaller than that on a flat metal substrate. Such a porous structure also allows a large mass loading, up to 8.3 mg/cm(2), which leads to a high areal capacitance of 2.8 F/cm(2) at a scan rate of 0.05 mV/s. Full cells were demonstrated, where the MnO(2)-CNT-textile was used as a positive electrode, reduced MnO(2)-CNT-textile as a negative electrode, and 0.5 M Na(2)SO(4) in water as the electrolyte. The resulting pseudocapacitor shows promising results as a low-cost energy storage solution and an attractive wearable power.
authors.affiliation: Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, USA.
authors.forename: Liangbing
authors.initials: L
authors.lastname: Hu
authors.forename: Wei
authors.initials: W
authors.lastname: Chen
authors.forename: Xing
authors.initials: X
authors.lastname: Xie
authors.forename: Nian
authors.initials: N
authors.lastname: Liu
authors.forename: Yuan
authors.initials: Y
authors.lastname: Yang
authors.forename: Hui
authors.initials: H
authors.lastname: Wu
authors.forename: Yan
authors.initials: Y
authors.lastname: Yao
authors.forename: Mauro
authors.initials: M
authors.lastname: Pasta
authors.forename: Husam N
authors.initials: HN
authors.lastname: Alshareef
authors.forename: Yi
authors.initials: Y
authors.lastname: Cui