Enhanced lithium ions storage performance of Fe_2(SO4)_3 anode material synthesized by solution calcination route with the assistance of melamine

摘要

Exploring novel electrode materials with high capacity, good cyclability, and low cost is very crucial for the development of lithium-ion batteries (LIBs). Herein, Fe-2(SO4)(3) anode material is synthesized by a facile solution calcination route with the assistance of melamine. The Fe-2(SO4)(3) sample synthesized with the assistance of melamine exhibits much superior high-rate capability (with a reversible capacity of 621 mA h g(-1) at 5.0 A g(-1)) and long-term cyclability (maintaining a reversible capacity of 755 mA h g(-1) after 600 cycles at 1.0 A g(-1)). Moreover, the Fe-2(SO4)(3) sample displays significant pseudocapacitive behavior during the discharge/charge processes; the lithium ions diffusion coefficient is evaluated to be in the range of 10(-11) similar to 10(-13) cm(2) s(-1).