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Reverse Micelle Synthesis of Colloidal Nickel-Manganese Layered Double Hydroxide Nanosheets and Their Pseudocapacitive Properties
- Authors
- Sim, Hwansu; Jo, Changshin; Yu, Taekyung; Lim, Eunho; Yoon, Songhun; Lee, Jung Heon; Yoo, Jibeom; Lee, Jinwoo; Lim, Byungkwon
- Issue Date
- Nov-2014
- Publisher
- WILEY-V C H VERLAG GMBH
- Keywords
- layered double hydroxide; manganese; nickel; pseudocapacitor; synthesis
- Citation
- CHEMISTRY-A EUROPEAN JOURNAL, v.20, no.45, pp 14880 - 14884
- Pages
- 5
- Journal Title
- CHEMISTRY-A EUROPEAN JOURNAL
- Volume
- 20
- Number
- 45
- Start Page
- 14880
- End Page
- 14884
- ISSN
- 0947-6539
1521-3765
- Abstract
- Colloidal nanosheets of nickel-manganese layered double hydroxides (LDHs) have been synthesized in high yields through a facile reverse micelle method with xylene as an oil phase and oleylamine as a surfactant. Electron microscopy studies of the product revealed the formation of colloidal nanoplatelets with sizes of 50-150nm, and X-ray diffraction, energy dispersive X-ray spectroscopy, and X-ray photoelectron spectroscopy studies showed that the Ni-Mn LDH nanosheets had a hydrotalcite-like structure with a formula of [Ni3Mn(OH)(8)](Cl-)nH(2)O. We found that the presence of both Ni and Mn precursors was required for the growth of Ni-Mn LDH nanosheets. As pseudocapacitors, the Ni-Mn LDH nanosheets exhibited much higher specific capacitance than unitary nickel hydroxides and manganese oxides.
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