화학공학소재연구정보센터
Journal of Power Sources, Vol.354, 108-115, 2017
Post-infiltration of a multilayered carbon nanofilm with MnO2 at low loadings for improved capacitive properties
A multilayered carbon nanosphere (CNS)/manganese oxide (MnO2) nanofilm is fabricated by a newly developed layer-by-layer (LBL) post-infiltration approach. The multilayered architecture effectively shortens the length over which ions diffuse, and the nanoscaled carbon/MnO2 interface provides an interconnected pathway for electron conduction. MnO2 acts not only as the redox center for charge storage, but also as the spacer between the LBL-assembled multilayers for more rapid electrolyte transport. A specific capacitance (based on MnO2) of 1134.0 F g(-1) is achieved at a loading of 5.22 mu g cm(-2) in a neutral electrolyte. This strategy provides a promising approach for fabricating high-power and high-energy electrochemical capacitors with precise control of electrode thickness on geometric device surfaces. (C) 2017 Elsevier B.V. All rights reserved.