Ultrathin Spinel LiMn2O4 Nanowires as High Power Cathode Materials for Li-Ion Batteries

• Published in: Nano letters Vol. 10; no. 10; pp. 3852 - 3856
• Main Authors: Lee, Hyun-Wook, Muralidharan, P., Ruffo, Riccardo, Mari, Claudio M., Cui, Yi, Kim, Do Kyung
• Format: Journal Article
• Language: English
• Published: Washington, DC American Chemical Society 13.10.2010
• Subjects: Applied sciences; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Direct energy conversion and energy accumulation; Electrical engineering. Electrical power engineering; Electrical power engineering; Electrochemical conversion: primary and secondary batteries, fuel cells; Exact sciences and technology; Materials science; Nanocrystalline materials; Nanoscale materials and structures: fabrication and characterization; Nanoscale materials: clusters, nanoparticles, nanotubes, and nanocrystals; Physics; Quantum wires; Structure of solids and liquids; crystallography; LiMn2O4 nanowires; lithium ion battery; high power density; Jahn−Teller distortion; Energy storage; Lithium battery; Cubic lattices; Manganese oxides; Spinels; Morphology; Solvothermal synthesis; Crystallinity; Lithium Manganites; Electrode material; Nanowires; Nanostructured materials
• ISSN: 1530-6984; 1530-6992
• DOI: 10.1021/nl101047f

Ultrathin LiMn2O4 nanowires with cubic spinel structure were synthesized by using a solvothermal reaction to produce α-MnO2 nanowire followed by solid-state lithiation. LiMn2O4 nanowires have diameters less than 10 nm and lengths of several micrometers. Galvanostatic battery testing showed that LiMn2O4 nanowires deliver 100 and 78 mAh/g at very high rate (60C and 150C, respectively) in a larger potential window with very good capacity retention and outstanding structural stability. Such performances are due to both the favorable morphology and the high crystallinity of nanowires.