Nano Archive

Hydrothermal synthesis of orthorhombic LiMnO2 nano-particles and LiMnO2 nanorods and comparison of their electrochemical performances

Xiao, Xiaoling and Wang, Li and Wang, Dingsheng and He, Xiangming and Peng, Qing and Li, Yadong (2009) Hydrothermal synthesis of orthorhombic LiMnO2 nano-particles and LiMnO2 nanorods and comparison of their electrochemical performances. Nano Research, 2 (12). pp. 923-930. ISSN 1998-0124 (Print) 1998-0000 (Online)

[img]
Preview
PDF
521Kb

Official URL: http://www.springerlink.com/content/x12pw3rx272040...

Abstract

Orthorhombic LiMnO2 nanoparticles and LiMnO2 nanorods have been synthesized by hydrothermal methods. LiMnO2 nanoparticles were synthesized by simple one-step hydrothermal method. To obtain rod-like LiMnO2, γ-MnOOH nanorods were first synthesized and then the H+ ions were completely replaced by Li+ resulting in LiMnO2 nanorods. Their electrochemical performances were thoroughly investigated by galvanostatic tests. Although the LiMnO2 nanoparticles have smaller size than LiMnO2 nanorods, the latter exhibited higher discharge capacity and better cyclability. For example, the discharge capacities of LiMnO2 nanorods reached 200 mA·h/g over many cycles and remained above 180 mA·h/g after 30 cycles. However, the maximum capacity of LiMnO2 nanoparticles was only 170 mA·h/g and quickly decreased to 110 mA·h/g after 30 cycles. Nanorods with one-dimensional electronic pathways favor the transport of electrons along the length direction and accommodate volume changes resulting from charge/discharge processes. Thus the morphology of LiMnO2 may play an important role in electrochemical performance

Item Type:Article
Subjects:Physical Science > Nanophysics
Physical Science > Nano objects
Material Science > Nanochemistry
Material Science > Nanostructured materials
Divisions:Faculty of Engineering, Science and Mathematics > School of Physics
Faculty of Engineering, Science and Mathematics > School of Chemistry
ID Code:8400
Deposited By:JNCASR
Deposited On:30 Mar 2010 05:25
Last Modified:30 Mar 2010 05:25

Repository Staff Only: item control page