Ti, F Codoped Sodium Manganate of Layered P2-Na 0.7 MnO 2.05 Cathode for High Capacity and Long-Life Sodium-Ion Battery

Open AccessRenewablesRESEARCH ARTICLES14 Jan 2023Ti, F co-doped Sodium Manganate of Layered P2-Na0.7MnO2.05 Cathode for High Capacity and Long-life Sodium Ion Battery Pengchao Wen, Haodong Shi, Dandan Guo, Aimin Wang, Yan Yu and Zhong-Shuai Wu Pengchao Wen , Haodong Shi , Dandan Guo , Aimin Wang , Yan Yu and Zhong-Shuai Wu https://doi.org/10.31635/renewables.022.202200012 SectionsSupplemental MaterialAboutPDF ToolsAdd to favoritesDownload CitationsTrack Citations ShareFacebookTwitterLinked InEmail The development of layered sodium manganese oxides cathode materials with high capacity and structural stability is one of the keys to boost the performance of sodium-ion batteries (SIBs), but remains a great challenge. Herein, a titanium and fluorine co-doped P2 type sodium manganate of Na0.7MnO2.05 cathode material (NMO-0.1TF) is developed as high-capacity and long-durable cathode for high-performance SIBs. The titanium and fluorine co-doping could significantly reduce the structural deformation, synergistically improved structural stabilization, inhibit the formation of irreversible phases and enhance electrochemical kinetics. As a result, the NMO-0.1TF||Na battery working in the voltage ranges of 2.0-4.2 V exhibits a high specific capacity of 227 mAh g-1 at current density of 20 mA g-1, and excellent rate performance (76 mAh g-1 at a high current density of 3 A g-1). Such battery still delivers an outstanding cycle stability, shows a high initial discharge capacity of 133 mAh g-1 at 1 A g-1, and maintains the initial capacity of 96.2% after 200 cycles. More importantly, the assembled full battery of NMO-0.1TF||hard carbon validates high capacity and impressive cyclability. Therefore, this co-doped NMO-0.1TF cathode with high capacity and excellent stability presents brilliantly practical application for developing high energy density SIBs. Download figure Download PowerPoint Previous articleNext article FiguresReferencesRelatedDetails Issue AssignmentNot Yet AssignedSupporting Information Copyright & Permissions© 2023 Chinese Chemical Society Downloaded 7 times PDF downloadLoading ...