Preparation of Calcium Vanadate Composite as a Cathode for the Aqueous Zinc-Ion Batteries
Category
Sciences and Technology
Department
Material Science
Student Status
Graduate
Research Advisor
Dr. Ram Gupta
Document Type
Event
Location
Student Center Ballroom
Start Date
10-4-2025 2:00 PM
End Date
10-4-2025 4:00 PM
Description
Aqueous zinc-ion batteries (ZIB) are considered an alternative to lithium-ion batteries concerning safety and low cost. However, finding suitable cathode materials is a challenging task. Herein, we prepared calcium vanadate, CaV2O7@V2O5, composite using microwave-assisted solvothermal synthesis and it was utilized as a cathode for ZIBs. The prepared XRD results confirmed the formation of the composite phase of CaV2O7@V2O5. The measured CV results reveal the redox behavior of the composite cathode. The CaV2O7@V2O5 composite cathode delivered an initial capacity of 175 mA/g and 174.2 mA/g, respectively. The capacity of the CaV2O7@V2O5 composite cathode initially increased up to 50 cycles and then gradually decreased. After, 200 cycles, the delivered discharge capacity is about 287 mA h/g at a current density of 100 mA/g with a Coulombic efficiency of 97.5%. Also, CaV2O7@V2O5 composite cathode showed an excellent reversible capacity of 182 mAh/g and 125 mAh/g at a high current density of 1000 mA/g and 2000 mA/g, respectively. After reversing back to its initial current density of 150 mA/g, the CaV2O7@V2O5 composite delivered a high capacity of 327 mAh/g indicating excellent rate performance. This work provides a new pathway for the fabrication of novel cathode materials for the fabrication of advanced batteries.
Preparation of Calcium Vanadate Composite as a Cathode for the Aqueous Zinc-Ion Batteries
Student Center Ballroom
Aqueous zinc-ion batteries (ZIB) are considered an alternative to lithium-ion batteries concerning safety and low cost. However, finding suitable cathode materials is a challenging task. Herein, we prepared calcium vanadate, CaV2O7@V2O5, composite using microwave-assisted solvothermal synthesis and it was utilized as a cathode for ZIBs. The prepared XRD results confirmed the formation of the composite phase of CaV2O7@V2O5. The measured CV results reveal the redox behavior of the composite cathode. The CaV2O7@V2O5 composite cathode delivered an initial capacity of 175 mA/g and 174.2 mA/g, respectively. The capacity of the CaV2O7@V2O5 composite cathode initially increased up to 50 cycles and then gradually decreased. After, 200 cycles, the delivered discharge capacity is about 287 mA h/g at a current density of 100 mA/g with a Coulombic efficiency of 97.5%. Also, CaV2O7@V2O5 composite cathode showed an excellent reversible capacity of 182 mAh/g and 125 mAh/g at a high current density of 1000 mA/g and 2000 mA/g, respectively. After reversing back to its initial current density of 150 mA/g, the CaV2O7@V2O5 composite delivered a high capacity of 327 mAh/g indicating excellent rate performance. This work provides a new pathway for the fabrication of novel cathode materials for the fabrication of advanced batteries.
