Premium
Construction of S@TiO 2 @r‐GO Composites for High‐Performance Lithium–Sulfur Batteries
Author(s) -
Li Jingfa,
Zhu Mingming,
Hu Peng,
Wang Xing,
Zhang Lei,
Li Min
Publication year - 2017
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201700422
Subject(s) - polysulfide , nanosheet , electrolyte , graphene , sulfur , chemistry , battery (electricity) , cathode , lithium–sulfur battery , dissolution , oxide , conductivity , lithium (medication) , chemical engineering , diffusion , nanotechnology , materials science , electrode , organic chemistry , power (physics) , thermodynamics , medicine , physics , quantum mechanics , endocrinology , engineering
Lithium–sulfur (Li–S) batteries have shown great promise in battery technology, likely to succeed Li‐ion batteries, considering their high energy density, and that they are environmentally benign, naturally abundant, and of low cost. Current development is, however, hindered by some tenacious issues of the sulfur cathode: the low electrical conductivity and the dissolution of the polysulfide intermediate into the electrolyte during operation. This paper reports an advanced design using a TiO 2 nanosheet host to trap polysulfides during battery operation and a reduced graphene oxide (r‐GO) sheet matrix to provide additional electron conduction and pathways for electrolyte and Li + ion diffusion. As expected, such hybrid materials exhibit high performance in Li–S batteries: they can deliver a high, reversible, specific capacity of 889 mAh g –1 over 100 charge/discharge cycles at a rate of 0.5 C, validating polysulfide containment and electron‐conductivity enhancement by the synergetic effect of the TiO 2 and r‐GO sheets.