Development of advanced high energy density lithium ion batteries is important for promoting electromobility. Making electric vehicles attractive and competitive compared to conventional automobiles depends on the availability of reliable, safe, high power, and highly energetic batteries whose components are abundant and cost effective. Nickel rich Li[Ni_xCo_yMn_1−x−y]O₂ layered cathode materials (x > 0.5) are of interest because they can provide very high specific capacity without pushing charging potentials to levels that oxidize the electrolyte solutions. However, these cathode materials suffer from stability problems. We discovered that doping these materials with tungsten (1 mol%) remarkably increases their stability due to a partial layered to cubic (rock salt) phase transition. We demonstrate herein highly stable Li ion battery prototypes consisting of tungsten-stabilized Ni rich cathode materials (x > 0.9) with specific capacities >220 mA h g^-1. This development can increase the energy density of Li ion batteries more than 30% above the state of the art without compromising durability.

Sodium manganese oxide with divalent Ni in prismatic sites, represented as o-Na_0.67[Ni_0.05Mn_0.95]O₂, shows high capacity with excellent cyclability.

A-site cation doping in perovskite-based materials (ABO ₃ formula) has a significant effect on the bifunctional oxygen activity of the electrocatalysts with chemical stability, enabling the design of highly active, durable, and cost-effective catalysts.

Thanks to the employment of a NSGA-II-based computation, which was used to determine the optimum multi-element doping composition at the Mn site of olivine-structured LiMnPO ₄ , we can propose the first examples of high-performance doped-LiMnPO ₄ cathodes for Li-ion batteries.

Herein, we report the soft X-ray absorption spectroscopic investigation for Li(Ni_0.8Co_0.1Mn_0.1)O₂ cathode material during charging and discharging. These measurements were carried out at the Mn L-, Co L-, and Ni L-edges during various stages of charging and discharging. Both the Mn and Co L-edge spectroscopic measurements reflect the invariance in the oxidation states of Mn and Co ions. The Ni L-edge measurements show the modification of the oxidation state of Ni ions during the charging and discharging process. These studies show that e_g states are affected dominantly in the case of Ni ions during the charging and discharging process. The O K-edge measurements reflect modulation of metal–oxygen hybridization as envisaged from the area-ratio variation of spectral features corresponding to t_2g and e_g states.