Abstract
Solving the polysulfide shuttle problem is one of the core challenges
for the industrialization of lithium–sulfur batteries. In this work, a
triphasic composite of LDH/sulfur/rGO (LDH: layered double hydroxide,
rGO: reduced graphene oxide) with a crepe cake like structure is
designed and fabricated as a positive electrode material for
lithium–sulfur batteries. Sulfur nanoparticles are embedded in the
interlayer space of the composite and thus are well protected physically
via three-dimensional wrapping and chemically via strong
interaction of LDH nanoflakes with lithium polysulfides, such as ionic
bonds and S···H hydrogen bonds. In addition, the flexible lamellar
structure of the composite with soft graphene layers can tolerate the
volume expansion of sulfur during lithiation as well as facilitate ionic
permeability and electron transport, which is favorable for the redox
reactions of polysulfide. The present work sheds light on the future
development and industrialization of lithium–sulfur batteries.
Original language | English |
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Journal | ACS Nano |
Volume | Articles ASAP |
Early online date | 15 Jun 2020 |
DOIs | |
Publication status | E-pub ahead of print - 15 Jun 2020 |
Keywords
- Crepe cake structure
- Graphene
- Layered double hydroxide
- Sulfur
- Lithium-sulfur batteries