Статья

Sonochemical synthesis of battery-type ZnCo2O4 electrode material with huge specific surface area for advanced hybrid supercapacitors

Hongyan SunSchool of Materials Science and Engineering, North University of China, Taiyuan 030051, ChinaMiao YuSchool of Materials Science and Engineering, North University of China, Taiyuan 030051, ChinaGaojuan WangSchool of Materials Science and Engineering, North University of China, Taiyuan 030051, ChinaXinxin HanSchool of Materials Science and Engineering, North University of China, Taiyuan 030051, ChinaYulin WangSchool of Materials Science and Engineering, North University of China, Taiyuan 030051, ChinaZheyu ZhangSchool of Materials Science and Engineering, North University of China, Taiyuan 030051, ChinaChunwang LuoSchool of Materials Science and Engineering, North University of China, Taiyuan 030051, ChinaXiaohong LiuSchool of Energy and Power Engineering, North University of China, Taiyuan 030051, ChinaChunju XuSchool of Materials Science and Engineering, North University of China, Taiyuan 030051, ChinaHuiyu ChenSchool of Materials Science and Engineering, North University of China, Taiyuan 030051, China

2023en

ABI

Аннотация

Sonochemistry is a novel and efficient method for the synthesis of electrode materials within micro-/nano-scale. In this work, the ZnCo 2 O 4 nanoparticles (NPs) and chain-like ZnCo 2 O 4 nanostructures , namely ZnCo 2 O 4 –7.5 and ZnCo 2 O 4 –9.5, were sonochemically prepared by controlling the pH value of reaction system combined with an extra calcination . The ZnCo 2 O 4 –7.5 NPs exhibited a larger specific surface area (SSA) of 148.77 m 2 g −1 , and presented better electrochemical properties such as a high specific capacity ( C s ) of 331.2C g −1 under 2 A g −1 along with 82.5 % rate performance at 10 A g −1 . As for the ZnCo 2 O 4 –9.5 nanostructure , it delivered an inferior C s of 274.8C g −1 and showed a moderate rate capability with 75.6 % capacity retention, accordingly. The hybrid supercapacitor (HSC) device was assembled using such ZnCo 2 O 4 –7.5 NPs (ZnCo 2 O 4 –9.5 nanostructure) as cathode and activated carbon (AC) as anode to explore the application potential in the field of electrochemical energy storage . After 7000 cycles at the current density of 8 A g −1 , both ZnCo 2 O 4 –7.5//AC and ZnCo 2 O 4 –9.5//AC HSCs showed outstanding cyclic stabilities with 100.4 % and 105.1 % of initial capacity retention, respectively. Meanwhile, the ZnCo 2 O 4 –7.5//AC HSC delivered a high energy density ( E d ) of 38.1 W h kg −1 at the power density ( P d ) of 1002.0 W kg −1 , and it could still hold 26.3 W h kg −1 at the higher P d of 9136.5 W kg −1 . In contrast, the ZnCo 2 O 4 –9.5//AC HSC presented a slightly inferior E d of 36.8 W h kg −1 at 1104.7 W kg −1 . The both types of ZnCo 2 O 4 –7.5 and ZnCo 2 O 4 –9.5 electrode materials demonstrate excellent electrochemical property, and they can be expected to show brilliant application potential in the field of electrochemical energy storage & conversion when served as electrode materials for high-performance hybrid supercapacitors . ZnCo 2 O 4 nanostructures with large specific surface area were prepared via an initial sonochemical method with an extra annealing treatment. These ZnCo 2 O 4 materials exhibited battery-type electrochemical response with a huge capacity of 331.2C g −1 at 2 A g −1 in 2 M of KOH electrolyte. The assembled ZnCo 2 O 4 nanoparticles//AC hybrid supercapacitor delivered a high energy density of 38.1 W h kg −1 at the power density of 1002.0 W kg −1 . • ZnCo 2 O 4 nanostructures with large surface area were sonochemically prepared. • A high specific capacity of 331.2C g −1 at 2 A g −1 was delivered. • No capacity decay over 7000 cycles at a high current density of 8 A g −1 . • The HSC device delivered an energy density of 38.1 W h kg −1 at 1002.0 W kg −1 .

Перевод пока недоступен

Идентификаторы

DOI: 10.1016/j.est.2023.109780

Цитирования и источники

Цитирований: 2Использованных источников: 0

Показатели — AkademScholar