Facile Synthesis of Ultrasmall SnO₂/Sn Nanoparticles Grown on the N-Doped Carbon Framework as a Long-Life Anode Material

Abstract

The development of SnO 2 -based negative materials possessing a long cyclic life is troubled by their huge volume change in the Li + insertion and detachment process. In our study, the SnO 2 /Sn/NC composite was successfully prepared by an uncomplicated and controllable route. The ultrasmall SnO 2 /Sn nanoparticles are fixed on the N-doped carbon framework, which prominently alleviate its vast volume variation and improve its electrochemical reaction kinetics. The above-mentioned feature of SnO 2 /Sn/NC endows it with an exceptional cyclic lifespan and good rate capability. When employed as the negative electrode for the Li-ion battery at 1.0 A g −1 , it releases a competent discharge capacity of 344 mAh g −1 at the 995th cycle. New dawn would be brought by the investigation of the synthesis and utilization of Sn-based compounds.

Bio‐Inspired Electrodes with Rational Spatiotemporal Management for Lithium‐Ion Batteries

“…[326] Encapsulating heterostructural Sn/SnO 2 microcube powders with a nitrogen-doped carbon coating as an anode material results in high initial discharge specific capacity, enhanced rate capability, and enhanced cycling stability. [327,328] Nitrogen introduction enhances the electronic conductivity, while the porous structure increases specific surface area. [329] Utilizing the metalorganic framework ZIF-67 as a template and carbon source, with SnCl4 as the tin supply, a new Sn-Co nanoalloy is synthesized to enhance the rate capacity and cycle stability of Sn-based anodes.…”