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High-Energy, High-Rate, Lithium-Sulfur Batteries: Synergetic Effect of Hollow TiO2-Webbed Carbon Nanotubes and a Dual Functional Carbon-Paper Interlayer

Title
High-Energy, High-Rate, Lithium-Sulfur Batteries: Synergetic Effect of Hollow TiO2-Webbed Carbon Nanotubes and a Dual Functional Carbon-Paper Interlayer
Author
선양국
Keywords
LI-S BATTERIES; COMPOSITE CATHODE MATERIALS; REDUCED GRAPHENE OXIDE; ION BATTERIES; POLYPYRROLE COMPOSITE; PERFORMANCE; CELLS; ANODE; CYCLABILITY; ELECTRODE
Issue Date
2016-01
Publisher
WILEY-V C H VERLAG GMBH
Citation
ADVANCED ENERGY MATERIALS, v. 6, NO 1, Article number 1501480, Page. 1-7
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.
URI
http://onlinelibrary.wiley.com/doi/10.1002/aenm.201501480/abstract;jsessionid=7E80CB0DA5E275557FFD27902492B9BA.f03t02http://hdl.handle.net/20.500.11754/30598
ISSN
1614-6832; 1614-6840
DOI
10.1002/aenm.201501480
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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