Open AccessPermselective Graphene Oxide Membrane for Highly Stable and Anti-Self-Discharge Lithium–Sulfur Batteries
Author(s) -
JiaQi Huang,
Ting-Zhou Zhuang,
Qiang Zhang,
HongJie Peng,
ChengMeng Chen,
Fei Wei
Publication year - 2015
Publication title -
acs nano
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.554
H-Index - 382
eISSN - 1936-086X
pISSN - 1936-0851
DOI - 10.1021/nn507178a
Subject(s) - polysulfide , graphene , separator (oil production) , membrane , sulfur , materials science , oxide , chemical engineering , lithium (medication) , lithium–sulfur battery , battery (electricity) , surface modification , nanotechnology , chemistry , electrode , electrochemistry , electrolyte , medicine , biochemistry , physics , power (physics) , quantum mechanics , endocrinology , metallurgy , engineering , thermodynamics
Lithium-sulfur batteries hold great promise for serving as next generation high energy density batteries. However, the shuttle of polysulfide induces rapid capacity degradation and poor cycling stability of lithium-sulfur cells. Herein, we proposed a unique lithium-sulfur battery configuration with an ultrathin graphene oxide (GO) membrane for high stability. The oxygen electronegative atoms modified GO into a polar plane, and the carboxyl groups acted as ion-hopping sites of positively charged species (Li(+)) and rejected the transportation of negatively charged species (Sn(2-)) due to the electrostatic interactions. Such electrostatic repulsion and physical inhibition largely decreased the transference of polysulfides across the GO membrane in the lithium-sulfur system. Consequently, the GO membrane with highly tunable functionalization properties, high mechanical strength, low electric conductivity, and facile fabrication procedure is an effective permselective separator system in lithium-sulfur batteries. By the incorporation of a permselective GO membrane, the cyclic capacity decay rate is also reduced from 0.49 to 0.23%/cycle. As the GO membrane blocks the diffusion of polysulfides through the membrane, it is also with advantages of anti-self-discharge properties.