TY  - JOUR
AU  - Zhou, Lei
AU  - Li, Hao
AU  - Zhang, Yue
AU  - Jiang, Ming
AU  - Danilov, Dmitri L.
AU  - Eichel, Rüdiger-A.
AU  - Notten, Peter H. L.
TI  - Enhanced sulfur utilization in lithium-sulfur batteries by hybrid modified separators
JO  - Materials today / Communications
VL  - 26
SN  - 2352-4928
CY  - Amsterdam [u.a.]
PB  - Elsevier
M1  - FZJ-2021-05751
SP  - 102133 -
PY  - 2021
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000634327200002
DO  - DOI:10.1016/j.mtcomm.2021.102133
UR  - https://juser.fz-juelich.de/record/904181
ER  -