Angewandte Chemie, Год журнала: 2024, Номер 136(36)

Опубликована: Июнь 17, 2024

Abstract Metal–organic frameworks (MOFs) are considered as a promising candidate for advancing energy storage owing to their intrinsic multi‐channel architecture, high theoretical capacity, and precise adjustability. However, the low conductivity poor structural stability lead unsatisfactory rate cycling performance, greatly hindering practical application. Herein, we propose sea urchin‐like Co‐ZIF‐L superstructure using molecular template induce self‐assembly followed by ion exchange method, which shows improved conductivity, successive channels, stability. The can gradually etch superstructure, leading reconstruction of with three‐dimensional (3D) cross‐linked ultrathin porous nanosheets. Moreover, control Co Ni ratios construct effective micro‐electric field synergistically enhance rapid transfer electrons electrolyte ions, improving CoNi‐ZIF‐L. 6.53 Ni‐ZIF‐L electrode exhibits specific capacity (602 F g −1 at 1 A ) long (95.3 % retention after 4,000 cycles 5 ). Ni‐ZIF‐L//AC asymmetric flexible supercapacitor employing gel also excellent (93.3 4000 This discovery provides valuable insights material selection efficiency improvement.

Язык: Английский