Mildly reduced less defective graphene oxide/sulfur/carbon nanotube composite films for high-performance lithium–sulfur batteries
文献情報
Rui Li, Miao Zhang, Yingru Li, Ji Chen, Bowen Yao, Mingpeng Yu, Gaoquan Shi
The microstructures and properties of the carbonaceous matrices in the cathodes of lithium–sulfur (Li–S) batteries have strong effects on their performances. We prepared a ternary composite cathode of mildly reduced less defective graphene oxide (mrLGO), sulfur, and carbon nanotubes (CNTs) by filtration for Li–S batteries. This battery showed a high initial specific capacity of 1219 mA h g−1 at 0.2 C and a stable specific capacity of around 1000 mA h g−1 after 200 cycles with a coulombic efficiency of 99%. Its excellent performance is mainly attributed to the good conductivity and residual oxygen containing groups of mrLGO, and the three-dimensional (3D) framework constructed using mrLGO sheets and CNTs.
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