Atomic Insights into the Enhanced Surface Stability in High Voltage Cathode Materials by Ultrathin Coating

Abstract

Surface properties of electrode materials play a critical role in the function of batteries. and improves the battery performance by decelerating the impedance buildup from the surface passivation. This study provides insightful information with characterizations of complementary scales at both the electrode level and particle level, and sheds light on the design of future coating processes and materials.

Improved Electrochemical Performance for High-Voltage Spinel LiNi0.5Mn1.5O4 Modified by Supercritical Fluid Chemical Deposition

“…Improvement of electrochemical performance at high rates was demonstrated for coated materials (SFCD 0.5% and DIS 1%), even for high-loaded electrodes, and SFC-coated material revealed better stabilization at a high rate than dispersion-coated material. These results clearly appear attractive/competitive vs/with those reported in the literature − ,− ,, (Table ), despite the difficulties to compare them directly because of a lack of information on the C-rate, loading, formulation, and electrolyte.…”

Depth-Dependent Redox Behavior of LiNi0.6Mn0.2Co0.2O2

“…Clearly, steps to decrease the reactivity of surface oxygen are necessary to improve the electrochemical performance of Ni-rich NMCs, particularly if the goal is to cycle to higher potentials to access higher practical capacities. To this end, certain strategies, such as partial Ti substitution [7][8][9]54 and coatings, 55 as well as the use of electrolyte additives 56 should prove useful.…”

“…To this end, certain strategies, such as partial Ti substitution [7][8][9]54 and coatings, 55 as well as the use of electrolyte additives 56 should prove useful.…”

Nanoengineered Organic Electrodes for Highly Durable and Ultrafast Cycling of Organic Sodium‐Ion Batteries

“…The coating layer can significantly reduce the interface resistance and provide more channels for Na + diffusion, thereby elevating the kinetics of PTCD. [ 54 ] Among the three metal oxides, Ti‐PTCD exhibited considerably improved capacity retention at high current rates compared to pristine PTCD. The rate performance of PTCD increases in the following order: pristine < ZnO < Al 2 O 3 < TiO 2 .…”