Berlin 2018 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 53: Energy materials (other than photovoltaics)

HL 53.2: Talk

Friday, March 16, 2018, 09:45–10:00, EW 202

Evaluate the Role of Nanostructure Current Collector in Supercapacitor Electrode when the Elctroactive Material is in the Form of Thick Layer — •Long Liu, Huaping Zhao, Yang Xu, Shipu Xu, Chenglin Zhang, and Yong Lei — Institut für Physik & IMN MacroNano (ZIK), Technische Universität Ilmenau, 98693, Ilmenau, German

Electroactive materials (especially pseudocapacitive materials) are generally in the form of ultrathin conformal coating in supercapacitor electrodes based on nanostructured current collectors, thus the resultant low mass loading of electroactive materials largely limits the applications of nanostructured current collectors. Here, supercapacitor electrodes with nickel nanorod arrays as nanostructured current collectors and MnO2 as electroactive materials are fabricated to study the role of nanostructured current collectors in determining the energy storage capability when electroactive materials are in thick layer rather than ultrathin conformal coating. Electrochemical analysis revealed that Ni nanorods could create numerous electrical conductive tunnels in the thick-layer electrodes to dramatically alleviate the contact resistance at the electroactive-materials/current-collectors interface. These results open up new opportunities for nanostructured current collectors to construct supercapacitors with superior energy storage capability.

[1]. Liu L., Zhao H.P.*, Wang Y., Fang Y.G., Xie J.L., Lei Y.*, Adv. Funct. Mater., 2017, DOI: 10.1002/adfm.201705107.