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MXene-Based Aerogel Anchored with Antimony Single Atoms and Quantum Dots for High-Performance Potassium-Ion Batteries
journal contribution
posted on 2022-01-19, 21:06 authored by Xin Guo, Hong Gao, Shijian Wang, Guang Yang, Xiuyun Zhang, Jinqiang Zhang, Hao Liu, Guoxiu WangRationally
electronic structure engineering of nanocomposite electrodes
shows great promise for enhancing the electrochemical performance
of rechargeable batteries. Herein, we report antimony single atoms
and quantum dots (∼5 nm) codecorated Ti3C2Tx MXene-based aerogels (Sb SQ@MA) for
high-performance potassium-ion batteries (PIBs). We found that the
atomically dispersed Sb could modify the electronic structure of the
Sb/Ti3C2Tx composite,
improve the charge transfer kinetics, and enhance the potassium storage
capability at the heterointerfaces. Additionally, the MXene-based
aerogel with rich surface functional groups and defects provides abundant
anchoring sites and endows the composite reinforced structural stability
and highly efficient electron transfer. The high loading of Sb (∼60.3
wt %) with short ionic transport pathways is desired potassium reservoirs.
These features synergistically enhance the rate and cycling performance
of the Sb SQ@MA electrodes in PIBs. This work has demonstrated an
enlightening technique to tailor the interface activity of heterostructured
electrodes for electrochemical applications.
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charge transfer kineticsantimony single atoms3 wt %)potassium storage capabilitydesired potassium reservoirssb (∼ 60features synergistically enhance3 sub2 subbased aerogel anchoredbased aerogelx performance potassiumbased aerogelssub ><> subsb sqrechargeable batteriesquantum dotsion batteriesinterface activityenlightening techniqueelectronic structureelectrochemical performanceelectrochemical applicationscycling performance