Zinc vacancy modulated quaternary metallic oxynitride GeZn1.7ON1.8: as a high-performance anode for lithium-ion storage. Issue 42 (23rd September 2022)

• Record Type: Journal Article
• Authors: Yao, Jinli; Ma, Fukun; Wang, Yan-Jie; Zuo, Yinzhe; Yan, Wei
• Is Part Of: RSC advances. Volume 12:Issue 42(2022)
• Page Start: 27072
• Page End: 27081
• Publication Date: 2022-09-23
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/d2ra04622a
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Zn-defected GeZn1.7 ON1.8 (GeZn1.7− x ON1.8 ) was successfully synthesized by a simple ammoniation and acid etching method. This well-designed Zn cation-deficient GeZn1.7− x ON1.8 anode shows enhanced lithium-ion storage performance. Abstract : The development of alternative anode materials to achieve high lithium-ion storage performance is crucial for the next-generation lithium-ion batteries (LIBs). In this study, a new anode material, Zn-defected GeZn1.7 ON1.8 (GeZn1.7− x ON1.8 ), was rationally designed and successfully synthesized by a simple ammoniation and acid etching method. The introduced zinc vacancy can increase the capacity by more than 100%, originating from the additional space for the lithium-ion insertion. This GeZn1.7− x ON1.8 particle anode delivers a high capacity (868 mA h g −1 at 0.1 A g −1 after 200 cycles) and ultralong cyclic stability (2000 cycles at 1.0 A g −1 with a maintained capacity of 458.6 mA h g −1 ). Electrochemical kinetic analysis corroborates the enhanced pseudocapacitive contribution and lithium-ion reaction kinetics in the GeZn1.7− x ON1.8 particle anode. Furthermore, X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analyses at different electrochemical reaction states confirm the reversible intercalation lithium-ion storage mechanism of this GeZn1.7− x ON1.8 particle anode. This study offers a new vision toward designing high-performance quaternary metallic oxynitride-based materials for large-scale energy storage applications.