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Encapsulating MWNTs into Hollow Porous Carbon Nanotubes: A Tube‐in‐Tube Carbon Nanostructure for High‐Performance Lithium‐Sulfur Batteries
Author(s) -
Zhao Yi,
Wu Wangliang,
Li Jiaxin,
Xu Zhichuan,
Guan Lunhui
Publication year - 2014
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201401191
Subject(s) - materials science , polysulfide , carbon nanotube , nanostructure , lithium (medication) , sulfur , carbon fibers , porosity , cathode , dissolution , tube (container) , lithium–sulfur battery , chemical engineering , nanotechnology , composite number , composite material , electrochemistry , electrolyte , electrode , metallurgy , medicine , chemistry , endocrinology , engineering
A tube‐in‐tube carbon nanostructure (TTCN) with multi‐walled carbon nanotubes (MWNTs) confined within hollow porous carbon nanotubes is synthesized for Li‐S batteries. The structure is designed to enhance the electrical conductivity, hamper the dissolution of lithium polysulfide, and provide large pore volume for sulfur impregnation. As a cathode material for Li‐S batteries, the S‐TTCN composite with 71 wt% sulfur content delivers high reversible capacity, good cycling performance as well as excellent rate capabilities.