V2O5 vs. LiFePO4: Who is performing better in the 3.4 V class category? A performance evaluation in “Rocking-chair” configuration with graphite anode

• Published in: Journal of industrial and engineering chemistry (Seoul, Korea) 2022, 112(0), , pp.389-397
• Main Authors: Praneetha, Selvarasu, Lee, Yun-Sung, Aravindan, Vanchiappan
• Format: Article
• Language: English
• Subjects: 화학공학
• ISSN: 1226-086X; 1876-794X
• DOI: 10.1016/j.jiec.2022.05.036

Vanadium pentoxide (V2O5) brings vast interest in the promising host materials for the intercalation ofmultivalent ions, owing to its abundance in the earth crust, synthesizing facile methodologies, and offersmaximum discharge capacity of >300 mAh g1. However, V2O5 undergoes different phase transformationsupon the intake of beyond 1 mol Li. Here, we report a comparative study of two versatile cathodematerials, such as V2O5 (limiting 1 mol. Li) and LiFePO4. A solvothermal method is adopted to synthesizeboth two, and three-dimensional crystalline phases of V2O5 and LiFePO4, respectively. The sphericalshapedV2O5 exhibits the initial discharge capacity of 136 mAh g1 in the half-cell assembly and rendersstable cycle life. Subsequently, V2O5 is paired with the electrochemically lithiated graphite (LiC6) anode infull-cell assembly (V2O5/LiC6) and offers a maximum energy density of 266.7 Wh kg1 (based on totalmass loading). On the other hand, LiFePO4 also exhibits 136 mAh g1 in the half-cell performance withstable cycle life. The full-cell LiFePO4/C delivers an energy density of 234.8 Wh kg1. This clearly encouragesthat V2O5 is a strong contender for the 3.4 V class Li-ion cells and paves the new avenue for furtherexploration of advanced battery technologies. KCI Citation Count: 0