Dual‐Vacancy‐Driven Ion Channel and Locking Effects in LDHs for High‐Rate, Long‐Life Chloride Ion Batteries

ABSTRACT Two‐dimensional (2D) transition‐metal compounds often suffer from the dissolution of active transition metals and structural collapse during electrochemical cycling. Herein, a sequential acid‐base regulation strategy is proposed to construct Zn and Al vacancies within layered double hydroxide (LDH) laminates, yielding a defect‐engineered NiZnFeAl‐V Zn V Al ‐Cl LDH. Benefiting from the synergistic effect of dual vacancies, LDH concurrently achieves “ion channel” and “ion locking” functio