Micro/nanostructured Bi2Mn4O10 with hierarchical spindle morphology as a highly efficient anode material for lithium-ion batteries

Mullite-type compound Bi2Mn4O10 has shown the feasibility as anodes of next lithium-ion batteries (LIBs). Herein micro/nano-Bi2Mn4O10 with hierarchical spindle-like architectures has been successfully synthesized using a one-step hydrothermal method without any no surfactant or template. A time-dependent experiment is carried out to observe the morphology evolution, suggesting a nucleation-aggregation/growth-dissolution-recrystallization process. As anode of LIBs, the as-prepared spindle-shaped micro/nano Bi2Mn4O10 harvests a significantly high initial discharge capacity of 1022 mA h g(-1) at 1 C, an excellent cyclability performance (563.8 mA h g(-1) after 400 cycles), a better high-rate capability (100 mA h g(-1) at 10 C), quick diffusion kinetics (1.8 x 10(-12) cm(2) s(-1)), and low active energy (19.5 kJ mol(-1)), which are significantly superior to that of its bulk counterparts and the previous reports. The encouraging lithium storage performance largely stems from the synergistic effect of the unique spindle-shaped micro/nanostructure.

Automated summary

Hierarchical spindle-like micro/nano-Bi2Mn4O10 has been successfully synthesized using a one-step hydrothermal method. It shows excellent lithium storage performance as an anode material for lithium-ion batteries, including high initial discharge capacity, excellent cyclability, better high-rate capability, quick diffusion kinetics, and low active energy.