%0 Journal Article
%A Zhou, Lei
%A Li, Hao
%A Zhang, Yue
%A Jiang, Ming
%A Danilov, Dmitri L.
%A Eichel, Rüdiger-A.
%A Notten, Peter H. L.
%T Enhanced sulfur utilization in lithium-sulfur batteries by hybrid modified separators
%J Materials today / Communications
%V 26
%@ 2352-4928
%C Amsterdam [u.a.]
%I Elsevier
%M FZJ-2021-05751
%P 102133 -
%D 2021
%X The extraordinary energy density and low cost enable lithium-sulfur (Li-S) batteries to be a promising alternative to traditional energy storage systems. The principal hurdle facing Li-S batteries is the unsatisfactory utilization of sulfur cathodes. The detrimental shuttle issue of polysulfides and the sluggish charge transfer kinetics result in quick capacity degradation of Li-S batteries. An MFLC hybrid material composed of manganese-iron layered double hydroxides (Mn-Fe LDH) and carbon nanotubes (CNT) has been developed. Such heterostructure combines the advantages of effective chemical bonding of Mn-Fe LDH towards polysulfides with the high conductivity of CNT. When modified on a polypropylene (PP) separator, the hybrid material is proven to significantly inhibit the shuttle issue of polysulfides and accelerate their redox reaction kinetics. Li-S batteries with MFLC-modified separators revealed considerably improved electrochemical performance. A high initial capacity of 1138 mA h g−1 and 70 % capacity retention after 200 cycles were achieved at 0.2 C. The enhanced sulfur utilization can be directly evaluated from the discharge voltage plateaus. The results indicate a new solution for the practical application of Li-S batteries and provide a simple approach to determine the efficiency of sulfur utilization.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000634327200002
%R 10.1016/j.mtcomm.2021.102133
%U https://juser.fz-juelich.de/record/904181