Abstract
Li-Ion Batteries In article number 2203999, Zhenpeng Yao, Chun Zhan, Jun Lu, and co-workers work toward the fabrication of intrinsically safe and high-energy-density 4.5 V-class Li-ion batteries. A sophisticated multifunctional surficial modification implemented by a neat one-step treatment is reported. An oxygen ion conductor introduced to the surface of the cathode restrains the activated surficial lattice oxygen ions by its stable oxygen vacancies, thereby dramatically enhancing battery safety.
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