TY - JOUR
T1 - Lithium–sulfur redox
T2 - challenges and opportunities
AU - Lang, Shuangyan
AU - Feng, Xinran
AU - Seok, Jeesoo
AU - Yang, Yao
AU - Krumov, Mihail R.
AU - Molina Villarino, Andrés
AU - Lowe, Michael A.
AU - Yu, Seung Ho
AU - Abruña, Héctor D.
N1 - Funding Information:
The authors acknowledge support from the Cornell Energy Systems Institute (CESI), the Energy Materials Center at Cornell (emc 2 ), an Energy Frontier Research Center funded by the U.S. Department of Energy , Office of Science , the Office of Basic Energy Sciences under award number DE-SC0001086, and Cornell's NSF GRFP under award number DGE-1650441.
Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2021/2
Y1 - 2021/2
N2 - Mechanistic and kinetic insights into the lithium–sulfur (Li–S) redox processes are essential to fundamentally increase the utilization of active material and further realize the practical applications of Li–S batteries. In this article, recent advances of in situ/operando characterizations of Li–S reaction processes and mechanism are presented, revealing the multistep transformations of S species. Interfacial visualization, from the whole interface to nanometer scale, provides specific evidence of sulfur distribution, polysulfide diffusion, and lithium sulfide precipitation. Moreover, the development of efficient electrocatalysts to improve the reaction kinetics are additionally presented and discussed. Although the understanding of the mechanism of the Li–S redox processes has improved in recent times, additional efforts are required for the scale-up production and practical applications of Li–S batteries.
AB - Mechanistic and kinetic insights into the lithium–sulfur (Li–S) redox processes are essential to fundamentally increase the utilization of active material and further realize the practical applications of Li–S batteries. In this article, recent advances of in situ/operando characterizations of Li–S reaction processes and mechanism are presented, revealing the multistep transformations of S species. Interfacial visualization, from the whole interface to nanometer scale, provides specific evidence of sulfur distribution, polysulfide diffusion, and lithium sulfide precipitation. Moreover, the development of efficient electrocatalysts to improve the reaction kinetics are additionally presented and discussed. Although the understanding of the mechanism of the Li–S redox processes has improved in recent times, additional efforts are required for the scale-up production and practical applications of Li–S batteries.
KW - In situ/operando characterization
KW - Interfacial electrocatalysis
KW - Lithium–sulfur batteries
KW - Reaction mechanism and kinetics
UR - http://www.scopus.com/inward/record.url?scp=85098541923&partnerID=8YFLogxK
U2 - 10.1016/j.coelec.2020.100652
DO - 10.1016/j.coelec.2020.100652
M3 - Review article
AN - SCOPUS:85098541923
SN - 2451-9103
VL - 25
JO - Current Opinion in Electrochemistry
JF - Current Opinion in Electrochemistry
M1 - 100652
ER -