Sandwich-Type Functionalized Graphene Sheet-Sulfur Nanocomposite for Rechargeable Lithium Batteries
Journal Article
·
· Physical Chemistry Chemical Physics. PCCP, 13(17):7660-7665
A sandwich structured graphene sheet-sulfur (GSS) nanocomposite was synthesized as the cathode material for lithium-sulfur batteries. The structure has a layer of graphene stacks and a layer of sulfur nanoparticles integrated into a three-dimensional architecture. This GSS nanoscale layered composite, making use of the efficient physical and electrical contact between sulfur and the large surface area, highly conductive graphene, provides a high loading of active materials of ~70 wt%, a high tape density of ~0.92 g∙cm-3, and a high power with a reversible capacity of ~505 mAh∙g-1 (~464 mAh∙cm-3) at a current density of 1,680 mA∙g-1 (1C). When coated with a thin layer of cation exchange Nafion film, the migration of dissolved polysulfide anions from the GSS nanocomposite was effectively alleviated, leading to a good cycling stability of 75% capacity retention over 100 cycles. This sandwich-structured composite conceptually provides a new strategy for designing electrodes in energy storage applications.
- Research Organization:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (US)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 1011781
- Report Number(s):
- PNNL-SA-75759; KC0201050
- Journal Information:
- Physical Chemistry Chemical Physics. PCCP, 13(17):7660-7665, Journal Name: Physical Chemistry Chemical Physics. PCCP, 13(17):7660-7665 Journal Issue: 17 Vol. 13; ISSN 1463-9076
- Country of Publication:
- United States
- Language:
- English
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