Electrolyte mobility in supercapacitor electrodes – Solid state NMR studies on hierarchical and narrow pore sized carbons
Source abstract
Abstract
Abstract Electrical double layer capacitors are in the special focus of current energy storage research due to their high power density. They store charge physically by quick electrosorption of electrolyte ions on the surface of porous carbon electrodes. However, fundamental insight into the storage mechanism, especially on a molecular level is limited despite of the crucial importance to understand and improve this promising technology. We have investigated and quantified the mobility of electrolyte ions in supercapacitor electrodes by means of solid-state nuclear magnetic resonance (NMR) spectroscopy. We could discriminate between the mobility of cations, anions, and solvent molecules. The exchange of these species between different pore systems as well as between pore system and external bulk environment is studied in detail by NMR spectroscopic methods.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Supercapacitor Materials and Fabrication · Advanced Battery Materials and Technologies · Conducting polymers and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (40)
Show source-provided references
1. Carbons and electrolytes for advanced supercapacitors10.1002/adma.201304137 ↗
2. Materials for electrochemical capacitors10.1038/nmat2297 ↗
3. Carbon-based supercapacitors produced by activation of graphene10.1126/science.1200770 ↗
4. The role of graphene for electrochemical energy storage10.1038/nmat4170 ↗
5. High-power supercapacitor electrodes based on vertically-aligned carbon nanotubes on aluminum10.1016/j.jpowsour.2012.11.068 ↗
6. High electroactivity of polyaniline in supercapacitors by using a hierarchically porous carbon monolith as a support10.1002/adfm.200700518 ↗
7. Anomalous increase in carbon capacitance at pore sizes less than 1 nm10.1126/science.1132195 ↗
8. Effect of pore size and its dispersity on the energy storage in nanoporous supercapacitors10.1039/c2ee03092f ↗
9. Tailoring porosity in carbon materials for supercapacitor applications10.1039/C3MH00112A ↗
10. Hierarchical micro- and mesoporous carbide-derived carbon as a high-performance electrode material in supercapacitors10.1002/smll.201001898 ↗
11. Hierarchically structured porous materials for energy conversion and storage10.1002/adfm.201200591 ↗
12. Carbide-derived carbons - from porous networks to nanotubes and graphene10.1002/adfm.201002094 ↗
13. Challenges facing lithium batteries and electrical double-layer capacitors10.1002/anie.201201429 ↗
14. On the molecular origin of supercapacitance in nanoporous carbon electrodes10.1038/nmat3260 ↗
15. Highly confined ions store charge more efficiently in supercapacitors10.1038/ncomms3701 ↗
16. Theoretical model for nanoporous carbon supercapacitors10.1002/anie.200703864 ↗
17. Interactions between electrolytes and carbon-based materials—NMR studies on electrical double-layer capacitors, lithium-ion batteries, and fuel cells10.1016/bs.arnmr.2015.08.003 ↗
18. Solid-state NMR studies of supercapacitors10.1016/j.ssnmr.2016.03.003 ↗
19. Tracking the structural arrangement of ions in carbon supercapacitor nanopores using in situ small-angle X-ray scattering10.1039/C5EE00488H ↗
20. Quantification of ion confinement and desolvation in nanoporous carbon supercapacitors with modelling and in situ X-ray scattering10.1038/nenergy.2016.215 ↗
21. Exploring electrolyte organization in supercapacitor electrodes with solid-state NMR10.1038/nmat3567 ↗
22. Direct observation of ion dynamics in supercapacitor electrodes using in situ diffusion NMR spectroscopy10.1038/nenergy.2016.216 ↗
23. 11B NMR study of the anion in activated carbons at various stages of charge of EDLCs in organic electrolyte10.1016/j.carbon.2006.06.001 ↗
24. Interaction of electrolyte molecules with carbon materials of well-defined porosity: characterization by solid-state NMR spectroscopy10.1039/c3cp52283k ↗
25. Ring current effects: factors affecting the NMR chemical shift of molecules adsorbed on porous carbons10.1021/jp502387x ↗
26. Ion counting in supercapacitor electrodes using NMR spectroscopy10.1039/C4FD00138A ↗
27. Real-time NMR studies of electrochemical double-layer capacitors10.1021/ja2072115 ↗
28. Multinuclear in situ magnetic resonance imaging of electrochemical double-layer capacitors10.1038/ncomms5536 ↗
29. In situ NMR and electrochemical quartz crystal microbalance techniques reveal the structure of the electrical double layer in supercapacitors10.1038/nmat4318 ↗
30. Desolvation of ions in subnanometer pores and its effect on capacitance and double-layer theory10.1002/anie.200704894 ↗
31. Synthesis of New, Nanoporous carbon with hexagonally ordered mesostructure10.1021/ja002261e ↗
32. Textural characterization of micro- and mesoporous carbons using combined gas adsorption and n -nonane preadsorption10.1021/la401206u ↗
33. Nanoporous carbide-derived carbon with tunable pore size10.1038/nmat957 ↗
34. Ordered mesoporous carbide derived carbons: novel materials for catalysis and adsorption10.1021/jp808470s ↗
35. Ordered mesoporous carbide derived carbons for high pressure gas storage10.1016/j.carbon.2010.01.004 ↗
36. Adsorption competition onto activated carbon, studied by magic- angle spinning NMR10.1039/ft9969202615 ↗
37. NMR studies of adsorption onto activated carbon10.1016/S0008-6223(99)00004-4 ↗
38. Oxygen-17 and deuterium NMR investigation into the adsorption of water on activated carbon10.1002/1097-458X(200011)38:11<918::AID-MRC749>3.0.CO;2-7 ↗
39. Magnetic response of single-walled carbon nanotubes induced by an external magnetic field10.1021/nn102590b ↗
40. Levitt · 2001