Robust and durable Li-ion batteries fabricated using lead-free crystalline M 2 NiMnO 6 (where M = Eu, Gd, and Tb) double perovskites

• Published in: CrystEngComm Vol. 26; no. 38; pp. 5421 - 5430
• Main Authors: Shinde, Kiran P., Chavan, Harish S., Mujawar, Sarfraj H., Salunke, Amol S., Ahmed, Abu Talha Aqueel, Shrestha, Nabeen K., Park, Joon Sik, Im, Hyunsik, Inamdar, Akbar I.
• Format: Journal Article
• Language: English
• Published: 30.09.2024
• ISSN: 1466-8033; 1466-8033
• DOI: 10.1039/D4CE00711E

Double perovskites with the general formula A 2 B 1 B 2 O 6 , in which A 2 is a lanthanide or alkaline earth metal and B 1 and B 2 are transition metals, are famous for their structures and excellent chemical and physical properties. Double perovskites have proven their ability as advanced anode materials for Li-ion batteries (LIB) with advantages in terms of rate capability, lifetime and safety; however, they have not been widely investigated. Therefore, in this work, we fabricated M 2 NiMnO 6 (where M = Eu, Gd, and Tb)-based perovskite electrode materials using a simple solid-state reaction method, and they were utilized as anode electrodes in LIBs. The structural, morphological and surface chemical investigations reveal the formation of phase-pure perovskite materials. Among the three types of perovskite materials, Tb 2 NiMnO 6 presents outstanding LIB properties, showing an initial discharge capacity of 318 mAh g −1 at a current density of 0.1 Å g −1 , which later stabilizes at 110 mAh g −1 in the successive cycles. The cycling stability of the Tb 2 NiMnO 6 anode electrode was studied for more than 500 cycles, demonstrating a high structural stability, 70% capacity retention with 0.06% capacity fading per cycle and excellent reversibility of nearly 100% during current rate cycling. Moreover, the Coulombic efficiency (94%) was found to be better than that of commercial graphite (60%), which suffers from sluggish electrochemical kinetics. Thus, the double perovskites studied in this work can be further investigated as alternatives to other established anode electrode materials for future LIBs.