Carbon Nanofiber Elastically Confined Nanoflowers: A Highly Efficient Design for Molybdenum Disulfide-Based Flexible...

Two-dimensional energy materials have been widely applied in advanced secondary batteries, among which molybdenum sulfide (MoS₂) is attractive because of the potential for high capacity and good rate performance. The relatively low electronic conductivity and irreversible volume expansion of pure MoS₂ still need to be improved. Here, a facile and highly efficient ex situ electrospinning technique is developed to design the carbon nanofiber elastically confined MoS₂ nanoflowers flexible electrode. The flexible freestanding electrode exhibits enhanced electronic conductivities and ionic diffusion coefficients, leading to a remarkable high specific capacity (596 mA h g^-1 at a current density of 50 mA g^-1) and capacity retention (with 89% capacity retention after 1100 cycles at 1 A g^-1). This novel idea underscores the potential importance of fabricating various flexible devices other than the sodium-ion battery.