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Enabling high-performance aqueous copper ion battery via precise morphology engineering
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DOI：10.1016/j.est.2025.116845.png)
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Abstract
En 中文
Rechargeable aqueous multivalent metal-ion batteries (AMMIBs) exhibit enormous potential in large-scale energy storage due to their inherent safety, environmental friendliness, and low cost. Exploration of high-capacity and durable cathode materials will be conducive to their further development. Herein, NbS2 nanospheres with three-dimensional hollow structure, named h-NbS2, are designed as cathodes in aqueous copper-ion battery system. The optimized morphology facilitates enhanced ion migration kinetics and alleviates the volume strain caused by the repeated insertion/extraction of Cu2+. Additionally, the intercalation-based energy storage mechanism ensures the stability of the host structure of electrode materials during electrochemical processes. Thus, the electrode prepared from h-NbS2 nanospheres exhibits an excellent reversible specific capacity of 553 mAh g-1 at 1 A g-1, and ultralong cycle stability of 235 mAh g-1 after 4000 cycles at 5 A g-1. Impressively, an advanced h-NbS2|CuSO4||ZnSO4|Zn hybrid ion battery reveals an energy density of 410.4 Wh kg-1 and an output voltage of 1.25 V, providing a promising strategy for the establishment of NbS2-based cathode in advanced AMMIBs.
Keywords:
Copper-ion battery
Hollow nanospheres
Intercalation-type cathodes
NbS2
Journal
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9.8
Papers:
2.2W
Citations:
10.1W
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