Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 42, 2014
Previous Article Next Article

Novel Au/Pd@carbon macrocellular foams as electrodes for lithium–sulfur batteries

Author affiliations

Abstract

Macro-mesocellular carbonaceous foams bearing metallic (Pd or Au) nanoparticles were synthesized and used to confine polysulfides at the cathode of lithium–sulfur (Li–S) batteries. We show that noble metal nanoparticles are useful for tuning the properties of cathode materials. On one hand, the surface chemistry of the metals enhances the polysulfide anchoring strength involved in carbon-based Li–S electrode cycling batteries. On the other hand, the metallic nanoparticles' nucleation and growth decreases the carbonaceous foam's mesoporosity appearing, at first glance, as a penalty. The Au@C-HIPE(80HF) sample shows a capacity for the first discharge at 327 mA h cm−3 decreasing to 182 mA h cm−3 after 50 cycles, corresponding, respectively, to 430 and 240 mA h g−1. The most efficient sample in terms of power density per mass, C-HIPE(2P5HF), exhibits a capacity for the first discharge at 202 mA h cm−3 decreasing to 150 mA h cm−3 after 50 cycles (respectively 1680 and 1000 mA h g−1). Hence, considering the capacity retention, the most interesting sample (C-HIPE(2P5HF)), if power density per weight is taken as the main criteria of choice, becomes one of the least efficient if we consider power density per volume. This work further demonstrates the importance of normalizing the power density not only by weight (mA h g−1) but also by volume (mA h cm−3) in order to provide absolute and comparable energy storage capabilities from one sample to another.

Graphical abstract: Novel Au/Pd@carbon macrocellular foams as electrodes for lithium–sulfur batteries

Back to tab navigation

Supplementary files

Article information


Submitted
10 Jul 2014
Accepted
08 Sep 2014
First published
08 Sep 2014

J. Mater. Chem. A, 2014,2, 18047-18057
Article type
Paper
Author version available

Novel Au/Pd@carbon macrocellular foams as electrodes for lithium–sulfur batteries

M. Depardieu, R. Janot, C. Sanchez, A. Bentaleb, R. Demir-Cakan, C. Gervais, M. Birot, M. Morcrette and R. Backov, J. Mater. Chem. A, 2014, 2, 18047
DOI: 10.1039/C4TA03537B

Social activity

Search articles by author

Spotlight

Advertisements