High‐Entropy Li‐Rich Layered Cathodes with Negligible Voltage Decay through Migration Retardation Effect DOI
Shuyu Zhou,

Junhong Liao,

Wentao Zhang

и другие.

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Май 24, 2025

Abstract The development of advanced Li‐ and Mn‐rich layered cathodes (LRO) is essential for high‐energy lithium‐ion batteries (LIBs). However, LRO exhibits large voltage hysteresis rapid decay with irreversible TM migration upon prolonged cycling. Given that high‐entropy oxides have expanded the potential retarding harmful phase transition regulating site energies, therefore a Li 1.17 Mn 0.50 Ni 0.12 Co Mg 0.03 Cu 0.02 Ti Nb O 2 cathode synthesized (HELRO) LIBs in present study, demonstrated significantly improved retention energy output. In addition, this work unveils sluggish degradation superlattice local structure HELRO during long charge–discharge cycles explains “migration retardation effect.” higher configurational entropy contributes to barriers in‐plane, out‐of‐plane, continuous migrations due synergistic ionic–covalent enhancement Mn─O bonds. This provides new insights understanding improvement mechanisms high demonstrates feasibility suppressing long‐standing by design combining covalent ionic elements.

Язык: Английский

High‐Entropy Li‐Rich Layered Cathodes with Negligible Voltage Decay through Migration Retardation Effect DOI
Shuyu Zhou,

Junhong Liao,

Wentao Zhang

и другие.

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Май 24, 2025

Abstract The development of advanced Li‐ and Mn‐rich layered cathodes (LRO) is essential for high‐energy lithium‐ion batteries (LIBs). However, LRO exhibits large voltage hysteresis rapid decay with irreversible TM migration upon prolonged cycling. Given that high‐entropy oxides have expanded the potential retarding harmful phase transition regulating site energies, therefore a Li 1.17 Mn 0.50 Ni 0.12 Co Mg 0.03 Cu 0.02 Ti Nb O 2 cathode synthesized (HELRO) LIBs in present study, demonstrated significantly improved retention energy output. In addition, this work unveils sluggish degradation superlattice local structure HELRO during long charge–discharge cycles explains “migration retardation effect.” higher configurational entropy contributes to barriers in‐plane, out‐of‐plane, continuous migrations due synergistic ionic–covalent enhancement Mn─O bonds. This provides new insights understanding improvement mechanisms high demonstrates feasibility suppressing long‐standing by design combining covalent ionic elements.

Язык: Английский

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