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.
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, Î³-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 mAÂ·h/g over many cycles and remained above 180 mAÂ·h/g after 30 cycles. However, the maximum capacity of LiMnO2 nanoparticles was only 170 mAÂ·h/g and quickly decreased to 110 mAÂ·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.
|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
|Deposited On:||11 Feb 2010 08:04|
|Last Modified:||18 Feb 2010 16:55|
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