Journal article
Organic-inorganic all-pseudocapacitive asymmetric energy storage devices
Nano energy, v 65(C), 104022
01 Nov 2019
Abstract
Two-dimensional transition metal carbides (MXenes) have shown extraordinary promise for pseudocapacitive energy storage under negative potential in aqueous electrolytes, yet they lack matching positive electrodes. Here, we report an organic compound namely 2,5-dihydroxy-1,4-benzoquinone (DBQ), adsorbed on reduced graphene oxide (rGO) sheets as a positive electrode, which can deliver high capacitance (similar to 500 F/g, similar to 800 F/cm(3) at 2 mV/s), rate performance (83 F/g or 133 F/cm(3) at 10 V/s), and remarkable cycle life (83% after 100,000 cycles), which is the highest for any reported discrete organic molecule. First-principle calculations were used to further understand the charge storage mechanism, find the preferred orientation of the adsorbed molecules, and to pinpoint the origin of the high pseudocapacitance and long cycle life. Optimized compositions of DBQ@rGO were paired with pseudocapacitive Ti3C2Tx MXene to manufacture devices composed of two entirely different classes of materials, where they electrochemically complement each other to expand the voltage window (and thus energy density) in aqueous electrolytes. As manufactured devices delivered energy density of 40 W h/kg at a power density of 2.9 kW/kg and capacitance retention of over 90% after 10,000 cycles.
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Details
- Title
- Organic-inorganic all-pseudocapacitive asymmetric energy storage devices
- Creators
- Muhammad Boota - Drexel Univ, Dept Mat Sci & Engn, AJ Drexel Nanomat Inst, 3141 Chestnut St, Philadelphia, PA 19104 USAChi Chen - Drexel Univ, Dept Mat Sci & Engn, AJ Drexel Nanomat Inst, 3141 Chestnut St, Philadelphia, PA 19104 USAKatherine L. Van Aken - Drexel Univ, Dept Mat Sci & Engn, AJ Drexel Nanomat Inst, 3141 Chestnut St, Philadelphia, PA 19104 USAJianjun Jiang - Huazhong University of Science and TechnologyYury Gogotsi - Drexel University, Materials Science and Engineering
- Publication Details
- Nano energy, v 65(C), 104022
- Publisher
- Elsevier
- Number of pages
- 9
- Grant note
- Fluid Interface Reactions, Structures, and Transport (FIRST) Center, an Energy Frontier Research Center - U.S. Department of Energy, Office of Basic Energy Sciences; United States Department of Energy (DOE) Fluid Interface Reactions, Structures, and Transport (FIRST) Center, an Energy Frontier Research Center - U.S. Department of Energy, Office of Science; United States Department of Energy (DOE) Chinese Scholarship Council (CSC); China Scholarship Council
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000496445600055
- Scopus ID
- 2-s2.0-85071393196
- Other Identifier
- 991014970047004721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology
- Physics, Applied