Synergistic activation of anionic redox via cosubstitution to construct high-capacity layered oxide cathode materials for sodium-ion batteries

Dual Modification of P3-Type Layered Cathodes to Achieve High Capacity and Long Cyclability for Sodium-Ion Batteries

“…The two curves of the Na + diffusion energy barrier in NNMO and NNCMO in Figure d show that Cu doping can obviously decrease the diffusion barrier of Na + from 0.99 to 0.68 eV, which further enhances the transport rate of sodium ions. Apart from the difference in ionic conductivity, the electronic conductivity was also compared by measuring their DC resistivities of the electrode surface using the Physics Property Measurement System (PPMS) . It is well-established that the polarization of the cathode and the effective voltage applied to the layered lattice can significantly affect the surface conductivity of the cathode, thereby consequently dominating the rate performance of the electrode .…”

“…Apart from the difference in ionic conductivity, the electronic conductivity was also compared by measuring their DC resistivities of the electrode surface using the Physics Property Measurement System (PPMS). 44 It is wellestablished that the polarization of the cathode and the effective voltage applied to the layered lattice can significantly affect the surface conductivity of the cathode, thereby consequently dominating the rate performance of the electrode. 45 In this work, the lowest surface resistivity was observed for NNCMO-PR, which confirms that the dual modification strategy is effective in improving the fast sodiation/desodiation process.…”

Fundamentals, status and challenges of direct recycling technologies for lithium ion batteries

“…23,24 Researchers have responded to this resource crisis by reducing the dependence on some scarce resources by optimizing the raw material content of electrode materials, 25,26 and designing next-generation rechargeable batteries to replace or supplement LIBs. [27][28][29] However, it is difficult to reduce the use of LIBs in the short term, and these methods are unlikely to solve the scarcity problem. Notably, since these resources are extracted from mines and processed into products, it doesn't mean that they disappear.…”

High-performance heterostructure Na0.7MnO2.05–Na0.91MnO2 as a lithium-free cathode for lithium-ion batteries

“…In light of its potential advantages, particularly its cost-effectiveness, eco-friendliness, facile synthesis, and high energy density, the lithium-free cathode stands out as a promising contender, particularly when compared with lithium-containing cathodes. 1,2…”

“…In light of its potential advantages, particularly its cost-effectiveness, eco-friendliness, facile synthesis, and high energy density, the lithium-free cathode stands out as a promising contender, particularly when compared with lithium-containing cathodes. 1,2 Pairing lithium-free transition metal-based cathodes with lithium metal anodes is emerging as a strategy to overcome the energy density limitations associated with existing rechargeable lithium-ion technology. Among a spectrum of cathode materials, manganese-based Na x TMO 2 layered oxide emerges as a focal point, offering benefits including cost-effectiveness, safety, and robust initial capacity (x r 1, TM = Mn, Ni, etc.).…”