Ni-Mn hydroxides as new high power electrode materials for supercapacitor applications
- Ni-Mn hydroxides as new high power electrode materials for supercapacitor applications
- O.A. Shlyakhtin; A.M. Skundin; 윤석진; 오영제
- Nanomaterials; Powder technology; Freeze drying; Electrochemical supercapacitors; Ni-Mn hydroxides; *2008년개인평가에반영되었음
- Issue Date
- Materials letters
- VOL 63, NO 1, 109-112
- The coprecipitation of Ni and Mn hydroxides followed by freeze drying results in the formation of agglomerated 20–30 nm particles of complex hydroxide with spinel-like structure. The thermal decomposition of this hydroxide causes the formation of ilmenite-type complex oxide at T N300 °C without considerable changes in the Ni and Mn valence states according to X-ray photoelectron spectroscopy data. Further processing at T ≤400 °C is accompanied by significant particle intergrowth though their internal structure remains nanostructured. Ni–Mn oxide- and hydroxide-based electrodes revealed a significant reversible electrochemical activity in the alkaline electrolytes and an extended operating voltage window (~1.8 V). Ni–Mn ilmenite-based electrode materials demonstrated a low fade rate and high specific electrochemical capacity values at high discharge rates (up to 70 mAh g− 1 at I=70 mA cm− 2) that makes feasible their application in high rate batteries and electrochemical supercapacitors.
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