Structural and electrochemical investigation of P2-NaFeMnO high-performance sodium ion cathode materials.

Fe/Mn-based metal oxides have attracted considerable attention as cathode materials for sodium-ion batteries owing to their low cost and high specific capacity. However, the relatively large ionic radius of the sodium ion (1.02 Å) results in inefficient diffusion kinetics, resulting in reduced battery performance.

Na Lattice Doping Induces Oxygen Vacancies to Achieve High Capacity and Mitigate Voltage Decay of Li-Rich Cathodes.

In this work, we synthesized 1D hollow square rod-shaped MnO, and then obtained Na lattice doped-oxygen vacancy lithium-rich layered oxide by a simple molten salt template strategy. Different from the traditional synthesis method, the hollow square rod-shaped MnO in NaCl molten salt provides numerous anchor points for Li, Co, and Ni ions to directly prepare LiNiCoMnO on the original morphology. Meanwhile, Na is also introduced for lattice doping and induces the formation of oxygen vacancy.

Enhancing the Electrochemical Performance of Ni-Rich LiNiCoAlO Cathodes through Tungsten-Doping for Lithium-Ion Batteries.

The tungsten-doped (0.5 and 1.0 mol%) LiNiCoAlO (NCA) cathode materials are manufactured to systematically examine the stabilizing effect of W-doping.

A high-performance histidine-functionalized MWCNT-GONR/Co-Ni LDH flower cluster structural composite via a microwave synthesis for supercapacitors.

A flower cluster structural histidine-functionalized multi-walled carbon nanotube-graphene oxide nanoribbon/Co-Ni LDH (His-MW/LDH) composite was synthesized via the microwave method. In this study, we used His-MW as a carbon material to synthesize the electrode because it not only has the properties of MWCNT-GONR (MW) but also completes the N doping process due to the addition of histidine. His-MW adhered to the LDH flower cluster, and the radius of the composite was found to be nearly 1 μm.

Microwave synthesis of histidine-functionalized graphene quantum dots/Ni-Co LDH with flower ball structure for supercapacitor.

A flower ball-like histidine-functionalized graphene quantum dots/Ni-Co LDH (His-GQD/LDH) composite is synthesized via microwave method. The GQDs are uniformly interspersed on LDH surface and the radius of flower balls is approximately 200 nm. The synergistic effect of His-GQD and LDH can signally increase the specific surface areas and conductivity of the composite, thus endowing the composite high specific capacitance (1526 F g) and an admirable cycling stability (82.