Synthesis and Electrochemical Properties of Multistage Pore Structure MoO2 Fiber/S Composite Cathode Materials View Homepage


Ontology type: schema:MonetaryGrant     


Grant Info

YEARS

2016-2018

FUNDING AMOUNT

200000.0 CNY

ABSTRACT

The high capacity and high stability of sulfur cathodes are the key to the application of lithium sulfur batteries. Nano oxides as additives can effectively improve the utilization and stability of the sulfur electrode, but the lower conductivity of the oxides restrict its application in lithium sulfur batteries. In this project, the conductive of MoO2 micro/nano fibers are prepared by electrospinning and the hierarchical porous structure of MoO2 fibers/sulufr composite cathode are prepared by heating sulfur. The conductive oxide of MoO2 is designed, which have adsorption polysulfides and catalytic lithium/sulfur redox reactions by hierarchical porous structure, electrocatalytic activity and high conductive. MoO2 as additives could improve the sulfur cathode electron conductivity and utilization, which are expected to improve the cycle performance of the lithium sulfur batteries. It is necessary to study on the parameters of preparation material. The formation mechanism of the interface structure in the composite cathode will be discussed. The catalytic lithium/sulfur redox reactions by hierarchical porous structure of MoO2 fibers will be explored. The multpihase interface reaction kinetics will be discussed. The electrochemical performance of MoO2 fibers/sulfur composite cathode will be researched in charging and discharging process. The project advances a new idea and method to prepare cathode materials for lithium sulfur batteries with high efficiency, stable and excellent cycling performance, and build a high energy density with excellent cycle performance lithium sulfur secondary batteries system, and have important academic significance and potential application prospect. More... »

URL

http://output.nsfc.gov.cn/conclusionProject/08c1aa031d078a86a53409f2d471c859

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