Heterostructure engineering of NiCo layered double hydroxide@NiCo2S4 for solid-state rechargeable zinc-air batteries. (20th January 2023)

• Record Type: Journal Article
• Authors: Lin, Kangdi; Zhou, Zihao; Peng, Chenting; Zhang, Jinlian; Huang, Hongyun; Chen, Meijie; Sun, Ming; Yu, Lin
• Is Part Of: Electrochimica acta. Volume 439(2023)
• Publication Date: 2023-01-20
• Subjects: Heterostructure -- Oxygen evolution reaction -- Oxygen reduction reaction -- Solid-state zinc-air battery; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2022.141546
• Languages: English
• ISSNs: 0013-4686

Abstract

Highlights: The NiCo-LDH@NiCo2 S4 is constructed via heterostructure engineering. Its electronic interaction and energy-level configuration are optimized. Its oxygen catalytic performance exceeds the pure NiCo-LDH and NiCo2 S4 . The corresponding zinc-air batteries deliver high power density and rechargeability. Abstract: Solid-state zinc-air batteries (ZABs) are considered as one of the promising next-generation energy storage devices, serving for artificial intelligence and wearable equipment. Unfortunately, they are less than satisfactory because of the unsatisfactory oxygen catalytic performance on air-electrode and the poor contact with solid-state electrolytes. Heterostructure engineering is one of the effective routes to solve the above problems. Herein, we constructed a bifunctional (oxygen reduction and evolution reactions) NiCo layered double hydroxide@NiCo2 S4 catalyst with well-designed heterointerfaces, which enhanced electronic interaction and optimized energy-level configuration. It delivers fast charge transfer kinetics and enhanced activity and thus achieves an excellent power density of 88.4 mW cm −2 and rechargeability with a high round-trip efficiency of 74.3% in the solid-state ZABs. This work provides deep insights into the structure-activity relationship between heterostructure catalysts and high-performance ZABs. Graphical abstract: Image, graphical abstract