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- Title
High-Energy, High-Rate, Lithium-Sulfur Batteries: Synergetic Effect of Hollow TiO<sub>2</sub>-Webbed Carbon Nanotubes and a Dual Functional Carbon-Paper Interlayer.
- Authors
Hwang, Jang‐Yeon; Kim, Hee Min; Lee, Sang‐Kyu; Lee, Joo‐Hyeong; Abouimrane, Ali; Khaleel, Mohammad Ahmed; Belharouak, Ilias; Manthiram, Arumugam; Sun, Yang‐Kook
- Abstract
A novel nanocomposite cathode consisting of sulfur and hollow-mesoporous titania (HMT) embedded within carbon nanotubes (CNT), which is designated as S-HMT@CNT, has been obtained by encapsulating elemental sulfur into the pores of hollow-mesoporous, spherical TiO2 particles that are connected via CNT. A carbon-paper interlayer, referred to as dual functional porous carbon wall (DF-PCW), has been obtained by filling the voids in TiO2 spheres with carbon and then etching the TiO2 template with a chemical process. The DF-PCW interlayer provides a medium for scavenging the lithium polysulfides and suppressing them from diffusing to the anode side when it is inserted between the sulfur cathode and the separator. Lithium-sulfur cells fabricated with the thus prepared S-HMT@CNT cathode and the DF-PCW interlayer exhibit superior performance due to the containment of sulfur in TiO2 and improved lithium-ion and electron transports. The Li-S cells display high capacity with excellent capacity retention at rates as high as 1C, 2C, and 5C rates.
- Subjects
CARBON nanotubes; LITHIUM; ALKALI metals; ELECTRIC batteries; NANOTUBES
- Publication
Advanced Energy Materials, 2016, Vol 6, Issue 1, pn/a
- ISSN
1614-6832
- Publication type
Academic Journal
- DOI
10.1002/aenm.201501480