title: Constructing a Protective Interface Film on Layered Lithium-Rich Cathode Using an Electrolyte Additive with Special Molecule Structure.
abstract: Phenyl vinyl sulfone (PVS) as a novel electrolyte additive is used to construct a protective interface film on layered lithium-rich cathode. Charge-discharge cycling demonstrates that the capacity retention of Li(Li0.2Mn0.54Ni0.13Co0.13)O2after 240 cycles at 0.5 C between 2.0 and 4.8 V (vs Li/Li+) reaches about 80% by adding 1 wt % PVS into a standard (STD) electrolyte, 1.0 M LiPF6in EC/EMC/DEC (3/5/2 in weight). This excellent performance is attributed to the special molecular structure of PVS, compared to the additives that have been reported in the literature. The double bond in the molecule endows PVS with preferential oxidizability, the aromatic ring ensures the chemical stability of the interface film, and the sulfur provides the interface film with ionic conductivity. These contributions have been confirmed by further electrochemical measurements, theoretical calculations, and detailed physical characterizations.
authors.affiliation: School of Chemistry and Environment, South China Normal University , Guangzhou 510006, China.
authors.forename: Xiongwen
authors.initials: X
authors.lastname: Zheng
authors.affiliation: School of Chemistry and Environment, South China Normal University , Guangzhou 510006, China.
authors.forename: Xianshu
authors.initials: X
authors.lastname: Wang
authors.affiliation: School of Chemistry and Environment, South China Normal University , Guangzhou 510006, China.
authors.forename: Xia
authors.initials: X
authors.lastname: Cai
authors.affiliation: School of Chemistry and Environment, South China Normal University , Guangzhou 510006, China.|Engineering Research Center of MTEES (Ministry of Education), Research Center of BMET (Guangdong Province), Engineering Laboratory of OFMHEB (Guangdong Province), Key Laboratory of ETESPG (GHEI), and Innovative Platform for ITBMD (Guangzhou Municipality), South China Normal University , Guangzhou 510006, China.
authors.forename: Lidan
authors.initials: L
authors.lastname: Xing
authors.affiliation: School of Chemistry and Environment, South China Normal University , Guangzhou 510006, China.|Engineering Research Center of MTEES (Ministry of Education), Research Center of BMET (Guangdong Province), Engineering Laboratory of OFMHEB (Guangdong Province), Key Laboratory of ETESPG (GHEI), and Innovative Platform for ITBMD (Guangzhou Municipality), South China Normal University , Guangzhou 510006, China.
authors.forename: Mengqing
authors.initials: M
authors.lastname: Xu
authors.affiliation: School of Chemistry and Environment, South China Normal University , Guangzhou 510006, China.|Engineering Research Center of MTEES (Ministry of Education), Research Center of BMET (Guangdong Province), Engineering Laboratory of OFMHEB (Guangdong Province), Key Laboratory of ETESPG (GHEI), and Innovative Platform for ITBMD (Guangzhou Municipality), South China Normal University , Guangzhou 510006, China.
authors.forename: Youhao
authors.initials: Y
authors.lastname: Liao
authors.affiliation: School of Chemistry and Environment, South China Normal University , Guangzhou 510006, China.|Engineering Research Center of MTEES (Ministry of Education), Research Center of BMET (Guangdong Province), Engineering Laboratory of OFMHEB (Guangdong Province), Key Laboratory of ETESPG (GHEI), and Innovative Platform for ITBMD (Guangzhou Municipality), South China Normal University , Guangzhou 510006, China.
authors.forename: Xiaoping
authors.initials: X
authors.lastname: Li
authors.affiliation: School of Chemistry and Environment, South China Normal University , Guangzhou 510006, China.|Engineering Research Center of MTEES (Ministry of Education), Research Center of BMET (Guangdong Province), Engineering Laboratory of OFMHEB (Guangdong Province), Key Laboratory of ETESPG (GHEI), and Innovative Platform for ITBMD (Guangzhou Municipality), South China Normal University , Guangzhou 510006, China.
authors.forename: Weishan
authors.initials: W
authors.lastname: Li
keywords: cyclic stability; electrolyte additive; layered lithium-rich oxide; molecular structure; phenyl vinyl sulfone