High-Capacity Calcium Vanadate Composite with Long-Term Cyclability as a Cathode Material for Aqueous Zinc-lon Batteries
Category
Topical Literature Review
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
Rechargeable aqueous zinc (Zn)-ion batteries (AZiBs) have been emerging as a complementary technology to lithium-ion batteries in energy storage applications sowing to their safe operation, low cost, and eco-friendly features. However, the development of AZiBs for commercialization is still in its infancy and is hindered by the unstable cathode. Herein, a calcium vanadate/vanadium oxide (CaV3O7/V2O3) composite (treated as CaVO) was prepared by a facile solvothermal synthesis and investigated as a cathode material for AZiBs. As a result, the CaVO composite cathode exhibited a high reversible capacity of 321.8 mAh/gover 300 cycles at 1 A/g and maintained a reversible capacity of 268 mAh/g over 600 cycles at 2A/g. Interestingly, the CaVO composite cathode showed excellent operating stability over 3000 cycles, even at a high current rate of 10A/g. The assembled Zn/CaVO battery delivered outstanding energy densities of 329 and 315 Whk/g at power densities of 206 and 414 Wk/g, respectively. In addition, an insight into the energy storage mechanism in Zn/CaVO composite rechargeable aqueous batteries was systematically elucidated using structural and morphological analyses. The CaVO composite cathode serves as an excellent Zn2+ host owing to the presence of Ca-ion pillaring, which results in good reversibility and excellent rate performance.
High-Capacity Calcium Vanadate Composite with Long-Term Cyclability as a Cathode Material for Aqueous Zinc-lon Batteries
Student Center Ballroom
Rechargeable aqueous zinc (Zn)-ion batteries (AZiBs) have been emerging as a complementary technology to lithium-ion batteries in energy storage applications sowing to their safe operation, low cost, and eco-friendly features. However, the development of AZiBs for commercialization is still in its infancy and is hindered by the unstable cathode. Herein, a calcium vanadate/vanadium oxide (CaV3O7/V2O3) composite (treated as CaVO) was prepared by a facile solvothermal synthesis and investigated as a cathode material for AZiBs. As a result, the CaVO composite cathode exhibited a high reversible capacity of 321.8 mAh/gover 300 cycles at 1 A/g and maintained a reversible capacity of 268 mAh/g over 600 cycles at 2A/g. Interestingly, the CaVO composite cathode showed excellent operating stability over 3000 cycles, even at a high current rate of 10A/g. The assembled Zn/CaVO battery delivered outstanding energy densities of 329 and 315 Whk/g at power densities of 206 and 414 Wk/g, respectively. In addition, an insight into the energy storage mechanism in Zn/CaVO composite rechargeable aqueous batteries was systematically elucidated using structural and morphological analyses. The CaVO composite cathode serves as an excellent Zn2+ host owing to the presence of Ca-ion pillaring, which results in good reversibility and excellent rate performance.
