首页|Hierarchical micro-nano structure based NiCoAl-LDH nanosheets reinforced by NiCo2S4 on carbon cloth for asymmetric supercapacitor
Hierarchical micro-nano structure based NiCoAl-LDH nanosheets reinforced by NiCo2S4 on carbon cloth for asymmetric supercapacitor
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NSTL
Elsevier
Rational construction of microstructure and successful incorporation of multiple components offer a scalable strategy for applying electrode materials in asymmetric supercapacitors. Herein, a hierarchical hybrid structure of NiCoAl-layered double hydroxide (NCA-LDH) and ternary spinel NiCo2S4 (NCS) on carbon cloth (CC) without binders is obtained through three-step hydrothermal reaction. The NCA-LDH@NCS@CC electrode exhibits outstanding electrochemical performance with 1775F g(-1) at 1 A g(-1). Its capacitance retention is 79.6% when cycles reach 10 000 under 10 A g(-1), benefiting from the hierarchical hybrid structure and improved overall conductivity. A flexible solid-state asymmetric supercapacitor (FSASC) is assembled using NCALDH@NCS@CC and activated carbon coated on carbon cloth (AC@CC ) for positive and negative electrodes, respectively. It possesses 33.13 Wh kg(-1) under 750 W kg(-1), and also maintains a better cycling performance of 71.4% at 1 A g(-1) after 10 000 cycles. Hierarchical hybrid NCA-LDH@NCS@CC electrode provides a favorable and scalable candidate for the development of FSASC device with superior performance.
NSTL
Elsevier
