Spray-drying synthesis of P2-Na2/3Fe1/2Mn1/2O2 with improved electrochemical properties

Effect of the Calcination Temperature on the Morphology, Structure, and Electrochemical Properties of Na0.67Ni0.11Cu0.11Fe0.3Mn0.48O2 Nanoparticles as Cathode Material for Na Batteries

“…The interplanar distances of adjacent crystal lattice stripes are 5.61 and 2.16 Å, corresponding to the d spacings of the P2 phase (002) plane and the O3 phase (104) plane, which further reveals the dual-phase P2/O3 intergrowth. This special structure plays an important role in inhibiting the sliding of the transition metal layer and improving the electrochemical properties of the material. ,, The SAED map along the direction of the (111) plane further confirms the typical hexagonal symmetric phase arrangement in the atomic column positions of the transition metal atoms, with distinct spots coinciding with the P2 structure. , The EDS (Figure e) results show that the Na, Ni, Cu, Fe, Mn, and O elements are uniformly distributed in the sample.…”

“…The two-phase synergy effect was obviously proven to be an effective method for optimizing Na x TMO 2 but suffered from a lack of in-depth systematic research. In addition, it has been reported that Ni-based Na x MO 2 has high storage capacity and Cu-based Na x MO 2 can inhibit the phase transition and improve its structural stability. − Taking into account the spray-drying method’s merits for cathode materials, such as the homogenization of the components and the enhancement of electrochemical properties, − nanoscale flake-like Ni–Cu doped P2–Na 0.67 Ni 0.11 Cu 0.11 Fe 0.3 Mn 0.48 O 2 materials were designed to be prepared by the spray-drying method in this report, and the effect of calcination temperature on the morphology, structure, and electrochemical properties was systematically investigated. Herein, it is also authenticated that the P2/O3 two-phase synergy effect can be realized by regulating the calcination temperature.…”

Advances on layered transition-metal oxides for sodium-ion batteries: a mini review

“…The material displayed hexagonal plate shape with an average diameter of 2-4 μm, and showed 243 mAh g −1 initial discharge capacity at 26 mA g -1 with excellent cycling performance. Sui et al (2019) prepared Na 2/3 Fe 1/2 Mn 1/2 O 2 by adopting simple spray drying method at low temperature. The as-obtained Na 2/3 Fe 1/ liquid electrolyte which was heated to 90 °C for the first time.…”

Recent Advances on High‐Capacity Sodium Manganese‐Based Oxide Cathodes for Sodium‐ion Batteries

“…Sui et al prepared spherical P2-type Na 2/3 Fe 1/ 2 Mn 1/2 O 2 by spray-drying method at around 700 °C. [36] The spherical structure is composed of numerous rough primary particles with porous structure, which are beneficial to shorten the Na + diffusion distance to some extent. The material shows a high charge transfer speed with a 217.9 mAh g À 1 initial capacity at 0.1 C.…”