Constructing dual-ion energy storage devices using anion-intercalation graphite cathodes offers the unique opportunity to simultaneously achieve high energy density and output power density. However, a critical challenge remains in the lack of proper anodes that match with graphite cathodes, particularly in sustainable electrolyte systems using abundant potassium. Here, a surface grafting approach utilizing multifunctional azobenzene sulfonic acid is reported, which transforms V2C MXene into a high-kinetics K+-intercalation anode (denoted ASA-V2C) for dual-ion energy storage devices. Importantly, the grafted azobenzene sulfonic acid offers extra K+-storage centers and fast K+-hopping sites, while concurrently acting as a buffer between V2C layers to mitigate the structural distortion during K+ intercalation/de-intercalation. These functionalities enable the V2C electrode with significantly enhanced specific capacity (173.9 mAh g−1 vs 121.5 mAh g−1 at 0.05 A g−1), rate capability (43.1% vs 12.0% at 20 A g−1), and cycling stability (80.3% vs 45.2% after 900 cycles at 0.05 A g−1). When coupled with an anion-intercalation graphite cathode, the ASA-V2C anode demonstrates its potential in a dual-ion energy storage device. Notably, the device depicts a maximum energy density of 175 Wh kg−1 and a supercapacitor-comparable power density of 6.5 kW kg−1, outperforming recently reported Li+-, Na+-, and K+-based dual-ion devices.
| Identifer | oai:union.ndltd.org:DRESDEN/oai:qucosa:de:qucosa:91550 |
| Date | 23 May 2024 |
| Creators | Sabaghi, Davood, Polčák, Josef, Yang, Hyejung, Li, Xiaodong, Morag, Ahiud, Li, Dongqi, Shaygan Nia, Ali, Khosravi H, Saman, Šikola, Tomáš, Feng, Xinliang, Yu, Minghao |
| Publisher | Wiley-VCH |
| Source Sets | Hochschulschriftenserver (HSSS) der SLUB Dresden |
| Language | English |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, doc-type:article, info:eu-repo/semantics/article, doc-type:Text |
| Rights | info:eu-repo/semantics/openAccess |
| Relation | 1614-6840, 2302961, 10.1002/aenm.202302961, info:eu-repo/grantAgreement/European Union/H2020 | SGA-RIA/881603//Graphene Flagship Core Project 3/GrapheneCore3, info:eu-repo/grantAgreement/European Union/H2020 | RIA/101017821//Multi-electron processes for light driven electrodes and electrolytes in conversion and storage of solar energy/LIGHT-CAP, info:eu-repo/grantAgreement/European Union/Horizon2020/101091572//Graphene, MXene and ionic liquid-based sustainable supercapacitor/GREENCAP, info:eu-repo/grantAgreement/European Union/M-ERA.NET/100478697//Synthesis and characterization of novel 2D hybrid materials for supercapacitors /HYSUCAP, info:eu-repo/grantAgreement/Deutsche Forschungsgemeinschaft/SFB 1415: Chemie der synthetischen zweidimensionalen Materialien/417590517/, info:eu-repo/grantAgreement/Sächsisches Staatsministerium für Wissenschaft und Kunst/M-ERA.NET/100478697//Synthesis and characterization of novel 2D hybrid materials for supercapacitors /HYSUCAP |
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