Bi@hollow carbon tube enabled high performance potassium metal batteries

Advances in bismuth-based anodes for potassium-ion batteries

“…A similar mechanism of the K-Bi alloy for K metal deposition was also reported by Cheng and his team. 191 In conclusion, research on potassium-ion full cells composed of Bi-based anodes and various cathodes has made great progress. However, there is still much room to improve the energy density and cycling stability.…”

“…A similar mechanism of the K–Bi alloy for K metal deposition was also reported by Cheng and his team. 191…”

Electrospun carbon-based nanomaterials for next-generation potassium batteries

“…Based on this rationale, Cheng et al proposed a 1D porous core-shell structure comprising a porous carbon shell and abundant potassiophilic Bi NPs in the core space via coaxial electrospinning. 168 The internal Bi NPs control the uniform nucleation of K and inhibit the dendritic growth, whereas the outer carbon shell accommodates K metal inside the carbon tube, thus alleviating the volume change and improving the stability of the K metal. Similarly, CoZn NPs embedded in hollow carbon tubes were also fabricated to enable uniform K nucleation and stable K plating/stripping.…”

Recent Progress of Potassium Metal Anodes: How to Regulate the Growth of Dendrite

“…Although the strategy based on Sand's time has shown progress in LMBs [109], solely depending on the modification of the host architecture would be an insufficient solution to dendrite growth on K metal anodes. Indeed, some researchers have reported that pristine CNT electrodes often fail to suppress the K dendrites' growth [72,110]. Therefore, on top of the scaffold design with a large surface area, another strategy is still needed.…”

“…Although this approach shares similarities with functional group doping in terms of suppressing dendrite growth, it differs in that particles are directly incorporated into the host material, making the host potassiophilic [110]. For example, Liu et al decorated the 3D-Cu current collector with reduced graphene oxide (rGO) sheets to enhance potassiophilicity of the current collector [75].…”