标题：Poly(vinyl pyrrolidone)-assisted hydrothermal synthesis of LiMn2O4nanoparticles with excellent rate performance
作者：Jiang, Rongyan ;Cui, Congying ;Ma, Houyi
作者机构：[Jiang, Rongyan ;Cui, Congying ;Ma, Houyi ] Key Laboratory for Colloid and Interface Chemistry of State Education Ministry, School of Chemistry and Ch 更多
摘要：LiMn2O4nanoparticles have been prepared by adding poly(vinyl pyrrolidone) (PVP) through a one-step hydrothermal method while PVP acts as reducing reagent. The dosage of PVP is studied and LiMn2O4prepared with 10 mL PVP solution (10-LMO) shows high capacity and excellent cycling property during galvanostatic charge/discharge test. Initial discharge capacity of 112 mAh g-1can be delivered at 5 C while the capacity retention is 93% after 100 cycles. Electrochemical impedance spectroscopy (EIS) results demonstrate that the 10-LMO electrode has the lowest resistance. So the migration and diffusion of Li+at the electrode surface of 10-LMO electrode is fast, resulting excellent rate performance. © 2012 Elsevier B.V. All rights reserved.