Electrochemical Performance of Sn/SnO Nanoparticles with Core-Shell Structure as Anode Materials for Sodium-Ion and Lithium-Ion Batteries

Abstract

Tin monoxide (SnO) is one of the most promising anode materials for lithium-ion and sodium-ion batteries owing to its high capacity. However, Tin and Tin oxide anodes in battery system have a poor cycling stability due to the large volume change (>300% in lithium-ion battery and 420% in sodium-ion battery) upon charge/discharge processes. To solve the problems caused by the large volume change, Sn and core-shell structured Sn/SnO nanoparticles are prepared using the pulsed wire evaporation (PWE) method, and subsequently cautious oxidation heat treatment. The Sn and core-shell structured Sn/SnO nanoparticles as anode materials are applied in lithium-ion and sodium-ion battery. The stability of the core-shell structured Sn/SnO electrode in repeated discharge/charge cycling was higher than that of Sn electrode in lithium-ion battery.