Compositionally complex doping for zero-strain zero-cobalt layered cathodes

Insulating High-Entropy Ruthenium Oxide as a Highly Efficient Oxygen-Evolving Electrocatalyst in Acid

“…16−18 Moreover, the configurational entropy from multielement mixing provides an additional contribution to the structure stability. 15,17 Inspired by such unique features, the high-entropy approach has been recently devoted to improving the OER activity of metal oxides. [19][20][21]23 For example, Yang et al 20 reported that multielement codoping was conducive to inducing more high-valence Ni 3+ species and thereby promoted the OER activity of highentropy (HE) spinel (Cr 0.2 Mn 0.2 Fe 0.2 Ni 0.2 Zn 0.2 ) 3 O 4 .…”

“…High-entropy oxides (HEOs), defined as five or more near equimolar principal elements randomly distributed in a single-phase lattice, have attracted ever-increasing attention due to their unique physicochemical properties. − For precious-metal oxide catalysts, constructing high-entropy species with nonprecious metals greatly lowers the precious-metal usage. Meanwhile, multiple atoms occupying the equivalent lattice sites can generate lattice distortions and regulate the metal–oxygen covalencies. − Moreover, the configurational entropy from multielement mixing provides an additional contribution to the structure stability. , Inspired by such unique features, the high-entropy approach has been recently devoted to improving the OER activity of metal oxides. − , For example, Yang et al reported that multielement codoping was conducive to inducing more high-valence Ni 3+ species and thereby promoted the OER activity of high-entropy (HE) spinel (Cr 0.2 Mn 0.2 Fe 0.2 Ni 0.2 Zn 0.2 ) 3 O 4 . Tang et al found that the incorporation of multiple atoms activated lattice oxygen sites by facilitating the formation of oxygen vacancies, endowing the HE perovskite La 0.6 Sr 0.4 Co 0.2 Fe 0.2 Mn 0.2 Ni 0.2 Mg 0.2 O 3 with fast OER kinetics.…”

High Entropy Enabling the Reversible Redox Reaction of V4+/V5+ Couple in NASICON‐Type Sodium Ion Cathode

“…[26][27][28][29][30] The increase in conformational entropy could lead to much possible combinations of interaction, which can stabilize the crystal structure and apparently enhance the performance. [31][32][33][34] In this work, we proposed an emerging highentropy NASICON concept based on the Na 3 V 2 (PO 4 ) 3 cathode. As indicated in Figure 1a, five metal ions (Al, Cr, Fe, In, and Ga) were simultaneously incorporated to produce a high-entropy NASICON with a chemical formula of Na 3 VAl 0.2 Cr 0.2 Fe 0.2 In 0.2 Ga 0.2 (PO 4 ) 3 (NVMP).…”

Stabilizing lattice oxygen and interface chemistry of Ni-rich and Co-poor cathodes for high-energy lithium-ion batteries

“…Currently, as a dramatic transformation of energy structure, stable and reliable lithium-ion batteries (LIBs) are craved in various elds, particularly for novel civilian electric vehicles. 1 Cobalt content in cathode materials plays a critical role in the price and performance of LIBs. 2,3 Frustratingly, mining ethics issue (child labor), extremely scarce Co resource threatening the fragile new energy vehicle industry.…”