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- Title
Preparation and electrochemical performance of nano-structured LiMnO for supercapacitor.
- Authors
Hao, Yan-Jing; Wang, Ling; Lai, Qiong-Yu
- Abstract
Nano-structured spinel LiMnO powder was prepared via a combustion method with hydrated lithium acetate (LiAc·2HO), manganese acetate (MnAc·4HO), and oxalic acid (CHO·2HO) as raw materials, followed by calcination of the precursor at 300 °C. The sample was characterized by X-ray diffraction, scanning electron microscope, and energy-dispersive X-ray spectroscopy techniques. Electrochemical performance of the nano-LiMnO material was studied using cyclic voltammetry, ac impedance, and galvanostatic charge/discharge methods in 2 mol L LiNO aqueous electrolyte. The results indicated that the nano-LiMnO material exhibited excellent electrochemical performance in terms of specific capacity, cycle life, and charge/discharge stability, as evidenced by the charge/discharge results. For example, specific capacitance of the single LiMnO electrode reached 407 F g at the scan rates of 5 mV s. The capacitor, which is composed of activated carbon negative electrode and LiMnO positive electrode, also exhibits an excellent cycling performance in potential range of 0-1.6 V and keeps over 98% of the maximum capacitance even after 4,000 cycles.
- Subjects
NANOSTRUCTURED materials; ACETATES; RAW materials; ELECTRODES; ELECTROCHEMICAL analysis
- Publication
Journal of Solid State Electrochemistry, 2011, Vol 15, Issue 9, p1901
- ISSN
1432-8488
- Publication type
Article
- DOI
10.1007/s10008-010-1206-6