A novel sheet-like porous carbon was designed as sulfur hosts for lithium-sulfur batteries by using graphene oxide (GO) as template directing agent and melamine-resorcinol-formaldehyde resin as the carbon precursor. Following CO2 activation treatment enabled this carbon sheets with high specific surface area (~ 2100 cm2/g) and high pore volume (~1.2 cm3/g). Here, we synthesized this graphene oxide based layered porous carbon materials for the impregnation of sulfur as cathode for Li-S battery. In this composite, a thin layer of porous carbon uniformly covers both surface of the graphene oxide and sulfur is highly dispersed in its pores. The high specific surface area and pore volume of the porous carbon layers not only can achieve a high sulfur loading in highly dispersed amorphous state, but also can act as polysulfide reservoirs to alleviate the shuttle effect. With the help of the thin porous carbon layers, the as-prepared materials demonstrate better electrochemical performance and cycle stability.

Comprehensive approach to produce industrially relevant lithium-sulfur cathodes

251st National Meeting (2016)

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