Encapsulation of sulfur with thin-layered nickel-based hydroxides for long-cyclic lithium–sulfur cells
Open Access
- 16 October 2015
- journal article
- research article
- Published by Springer Science and Business Media LLC in Nature Communications
- Vol. 6 (1), 8622
- https://doi.org/10.1038/ncomms9622
Abstract
Elemental sulfur cathodes for lithium/sulfur cells are still in the stage of intensive research due to their unsatisfactory capacity retention and cyclability. The undesired capacity degradation upon cycling originates from gradual diffusion of lithium polysulfides out of the cathode region. To prevent losses of certain intermediate soluble species and extend lifespan of cells, the effective encapsulation of sulfur plays a critical role. Here we report an applicable way, by using thin-layered nickel-based hydroxide as a feasible and effective encapsulation material. In addition to being a durable physical barrier, such hydroxide thin films can irreversibly react with lithium to generate protective layers that combine good ionic permeability and abundant functional polar/hydrophilic groups, leading to drastic improvements in cell behaviours (almost 100% coulombic efficiency and negligible capacity decay within total 500 cycles). Our present encapsulation strategy and understanding of hydroxide working mechanisms may advance progress on the development of lithium/sulfur cells for practical use.This publication has 39 references indexed in Scilit:
- Sulfur‐Based Composite Cathode Materials for High‐Energy Rechargeable Lithium BatteriesAdvanced Materials, 2014
- Bifunctional Separator with a Light‐Weight Carbon‐Coating for Dynamically and Statically Stable Lithium‐Sulfur BatteriesAdvanced Functional Materials, 2014
- Lithium–Sulfur Batteries: Electrochemistry, Materials, and ProspectsAngewandte Chemie-International Edition, 2013
- Nanostructured sulfur cathodesChemical Society Reviews, 2013
- Design and Preparation of Materials for Advanced Electrochemical StorageAccounts of Chemical Research, 2013
- Smaller Sulfur Molecules Promise Better Lithium–Sulfur BatteriesJournal of the American Chemical Society, 2012
- Challenges and Prospects of Lithium–Sulfur BatteriesAccounts of Chemical Research, 2012
- High-Capacity Micrometer-Sized Li2S Particles as Cathode Materials for Advanced Rechargeable Lithium-Ion BatteriesJournal of the American Chemical Society, 2012
- Li–O2 and Li–S batteries with high energy storageNature Materials, 2011
- Electrochemical characteristics of sulfur composite cathode materials in rechargeable lithium batteriesJournal of Power Sources, 2004