Advanced Science, Год журнала: 2023, Номер 10(23)

Опубликована: Июнь 4, 2023

The fast OH- transfer between hydroxide layers is the key to enhancing charge storage efficiency of layered double hydroxides (LDH)-based supercapacitors (SCs). Constructing interlayer reactive sites in LDH much expected but still a huge challenge. In this work, CdS nano-dots (NDs) are introduced interlayers ultra-thin NiFe-LDH (denoted CdSinter. -NiFe-LDH), promoting ions flow for higher redox activity. excellent performance not only due enlarged layer spacing (from 0.70 0.81 nm) also stems from anchored units and undamaged original structure LDH, which contribute improvement diffusion coefficient (1.6 × 10-8 cm2 s-1 ) electrochemical active area (601 mF cm-2 better than that NDs on surface (2.1 10-9 350 ). champion -NiFe-LDH electrode displays high capacitance 3330.0 F g-1 at 1 A retention 90.9% 10 , with (1966.6 Moreover, assembled asymmetric SCs (ASC) device demonstrate an outstanding energy density/power density (121.56 Wh kg-1 /754.5 W

Язык: Английский