Journal
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
Volume 836, Issue -, Pages 118-124Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2019.02.002
Keywords
MXene-derived carbon; Layered double hydroxide; In situ growth; 3D porous nanostructure; Hybrid capacitors
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Funding
- National Natural Science Foundation of China [U1802256, 51672128, 21773118, 51802154, 21875107]
- Prospective Joint Research Project of Cooperative Innovation Fund of Jiangsu Province [BY2016003-13]
- Key Research and Development Program in Jiangsu Province [BE2018122]
- Fundamental Research Funds for the Central Universities of NUAA [NJ20160104]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
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A three-dimensional (3D) hierarchically MXene-derived carbon/nickel-manganese layered double hydroxide nanosheets composite (MDC/NiMn-LDH) is constructed by a facile in situ growth route. Such unique 3D structure could provide fast and short pathway for electron and ion transfer, but also sufficiently expose active area for redox reactions of NiMn-LDH. The electrochemical investigation indicates that the optimized MDC/Ni5Mn1-LDH composite delivers a high specific capacity of 228 mAh g(-1) at 1 A g(-1), remarkable rate capability with 158 mAh g(-1) retention at 10 A g(-1), and excellent cycling stability of 74% retention with 122 mAh g(-1) after 4500 cycle tests at 8 A g(-1). In addition, a high-performance alkaline hybrid capacitor is fabricated based on the MDC/Ni5Mn1-LDH positive electrode and the 3D ordered porous carbon nanosheets (aPCNs) negative electrode, which manifests a high energy density of 45.2 Wh kg(-1) at a power density of 802 W kg(-1).
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