Reverse Micelle Synthesis of Colloidal Nickel–Manganese Layered Double Hydroxide Nanosheets and Their Pseudocapacitive Properties |
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| Authors: | Hwansu Sim Changshin Jo Prof Taekyung Yu Eunho Lim Prof Songhun Yoon Prof Jung Heon Lee Prof Jibeom Yoo Prof Jinwoo Lee Prof Byungkwon Lim |
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| Institution: | 1. School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon 440‐746 (Korea);2. Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 790‐784 (Korea);3. Department of Chemical Engineering, Kyung Hee University, Yongin 446‐701 (Korea);4. School of Environmental Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang 790‐784 (Korea);5. Department of Integrative Engineering, Chung‐Ang University, Seoul 156‐756 (Korea) |
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| 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 50–150 nm, 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?) ? n H2O. 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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| Keywords: | layered double hydroxide manganese nickel pseudocapacitor synthesis |
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