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Nanomaterials 2016, 6(1), 10; doi:10.3390/nano6010010

The Influence of Carbonaceous Matrices and Electrocatalytic MnO2 Nanopowders on Lithium-Air Battery Performances

1
Dipartimento di Chimica, Università degli Studi di Milano, via Golgi 19, 20133 Milano, Italy
2
ISTM-CNR, Istituto di Scienze e Tecnologie Molecolari, c/o Dipartimento di Chimica, Università degli Studi di Milano, via Golgi 19, 20133 Milano, Italy
3
Dipartimento di Scienza dei Materiali, Università degli Studi di Milano Bicocca, via Roberto Cozzi 55, 20125 Milano, Italy
4
Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali—INSTM, via G. Giusti 9, 50121 Firenze, Italy
5
Istituto de Catalisis y Petroleoquimica, Consejo Superior de Investigaciones Cientificas, C/Marie Curie 2, L10, 28049 Madrid, Spain
6
CNR-ISTM/ISTeM, via Fantoli 15/16, 20138 Milano, Italy
*
Author to whom correspondence should be addressed.
Academic Editors: Hermenegildo García and Sergio Navalón
Received: 1 December 2015 / Revised: 28 December 2015 / Accepted: 31 December 2015 / Published: 6 January 2016
(This article belongs to the Special Issue Nanoparticles for Catalysis)
View Full-Text   |   Download PDF [1729 KB, uploaded 6 January 2016]   |  

Abstract

Here, we report new gas diffusion electrodes (GDEs) prepared by mixing two different pore size carbonaceous matrices and pure and silver-doped manganese dioxide nanopowders, used as electrode supports and electrocatalytic materials, respectively. MnO2 nanoparticles are finely characterized in terms of structural (X-ray powder diffraction (XRPD), energy dispersive X-ray (EDX)), morphological (SEM, high-angle annular dark field (HAADF)-scanning transmission electron microscopy (STEM)/TEM), surface (Brunauer Emmet Teller (BET)-Barrett Joyner Halenda (BJH) method) and electrochemical properties. Two mesoporous carbons, showing diverse surface areas and pore volume distributions, have been employed. The GDE performances are evaluated by chronopotentiometric measurements to highlight the effects induced by the adopted materials. The best combination, hollow core mesoporous shell carbon (HCMSC) with 1.0% Ag-doped hydrothermal MnO2 (M_hydro_1.0%Ag) allows reaching very high specific capacity close to 1400 mAh·g−1. Considerably high charge retention through cycles is also observed, due to the presence of silver as a dopant for the electrocatalytic MnO2 nanoparticles. View Full-Text
Keywords: manganese dioxide nanoparticles; silver doping; mesoporous carbon; gas diffusion electrode (GDE); Li-air battery manganese dioxide nanoparticles; silver doping; mesoporous carbon; gas diffusion electrode (GDE); Li-air battery
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Minguzzi, A.; Longoni, G.; Cappelletti, G.; Pargoletti, E.; Di Bari, C.; Locatelli, C.; Marelli, M.; Rondinini, S.; Vertova, A. The Influence of Carbonaceous Matrices and Electrocatalytic MnO2 Nanopowders on Lithium-Air Battery Performances. Nanomaterials 2016, 6, 10.

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