Long-life Li/polysulphide batteries with high sulphur loading enabled by lightweight three-dimensional nitrogen/sulphur-codoped graphene sponge
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Open Access
- 17 July 2015
- journal article
- research article
- Published by Springer Science and Business Media LLC in Nature Communications
- Vol. 6 (1), 7760
- https://doi.org/10.1038/ncomms8760
Abstract
Lithium–sulphur batteries with a high theoretical energy density are regarded as promising energy storage devices for electric vehicles and large-scale electricity storage. However, the low active material utilization, low sulphur loading and poor cycling stability restrict their practical applications. Herein, we present an effective strategy to obtain Li/polysulphide batteries with high-energy density and long-cyclic life using three-dimensional nitrogen/sulphur codoped graphene sponge electrodes. The nitrogen/sulphur codoped graphene sponge electrode provides enough space for a high sulphur loading, facilitates fast charge transfer and better immobilization of polysulphide ions. The hetero-doped nitrogen/sulphur sites are demonstrated to show strong binding energy and be capable of anchoring polysulphides based on first-principles calculations. As a result, a high specific capacity of 1,200 mAh g−1 at 0.2C rate, a high-rate capacity of 430 mAh g−1 at 2C rate and excellent cycling stability for 500 cycles with ∼0.078% capacity decay per cycle are achieved.This publication has 62 references indexed in Scilit:
- Rechargeable Lithium–Sulfur BatteriesChemical Reviews, 2014
- Sulfur Cathodes with Hydrogen Reduced Titanium Dioxide Inverse Opal StructureACS Nano, 2014
- Preparation of N-doped activated carbons for electric double-layer capacitors from waste fiberboard by K2CO3 activationNew Carbon Materials, 2014
- Carbon–sulfur composites for Li–S batteries: status and prospectsJournal of Materials Chemistry A, 2013
- Nanostructured sulfur cathodesChemical Society Reviews, 2013
- Challenges and Prospects of Lithium–Sulfur BatteriesAccounts of Chemical Research, 2012
- Li–O2 and Li–S batteries with high energy storageNature Materials, 2011
- Electrical Energy Storage for the Grid: A Battery of ChoicesScience, 2011
- A highly ordered nanostructured carbon–sulphur cathode for lithium–sulphur batteriesNature Materials, 2009
- Issues and challenges facing rechargeable lithium batteriesNature, 2001