Due to the growing popularity in renewable energy adaptation and decentralised generation, energy storage has become a crucial part to maintain the resilience and efficiency of our power infrastructure. Among various types of energy storage technologies, aqueous zinc ion batteries is considered as an ideal candidate for grid storage application, which can be fabricated at low cost, with high environmental benignity and safety. However, there are still some challenges that impede AZiBs from practical application, and one of which is the lack of suitable cathode material.
To tackle this persisting challenge, the team has successfully developed a coral-like V2O5 as a high performance cathode material for AZiBs. Its unique micro/nano structure has proven to shorten activation processes and enhance the specific capacity (245 mA g-1 at 100 mA g-1) over conventional bulk-size V2O5 (14.4% higher). In addition, the synthesis of the coral-like V2O5 was demonstrated with a fast and facile fabrication process, reducing the energy consuming hydrothermal treatment from 6-24 hours down to about 30 minutes. Hence, these appealing characteristics of coral-like V2O5 cathode have paved the way for high performance AZiBs that are commercially viable for grid storage application.
Figure 1 Scanning Electron Microscope Image of Coral-like V2O5
Figure 2 A Sample of Coin Cell
Figure 3 Comparison of Coral-like V2O5 and bulk-size commercial V2O5