Bimetallic hydroxyl fluoride with high‐rate lithium storage performance: Co0.6Zn0.4(OH)F material. (1st June 2022)

• Record Type: Journal Article
• Authors: Liu, Yicen; Zhu, Bing; Liu, Yan‐gai; Zhao, Hang; Wang, Zekun; Wu, Liming; Zhang, Xi; Chen, Jian
• Is Part Of: International journal of energy research. Volume 46:Number 10(2022)
• Page Start: 14534
• Page End: 14545
• Publication Date: 2022-06-01
• Subjects: bimetallic fluoride -- Co0.6Zn0.4(OH)F -- electrochemical characteristics -- LIBs -- nanoneedle; Power resources -- Periodicals; Power (Mechanics) -- Periodicals; Power resources -- Research -- Periodicals; 621.042
• DOI: 10.1002/er.8144
• Languages: English
• ISSNs: 0363-907X

Abstract

Summary: In this study, we synthesized a bimetal hydroxyl fluoride, Co0.6 Zn0.4 (OH)F, with an overlapping nanoneedle structure using a simple hydrothermal method. The synthesized Co0.6 Zn0.4 (OH)F was used as a new electrode material to study its electrochemical performance. Because of the synergy between Co and Zn and the high ionicity of fluorides, the Co0.6 Zn0.4 (OH)F electrode exhibited a discharge capacity of 1355.5 mAh g −1 during the first charging and discharging cycle. After 400 cycles at a current density of 2 A g −1, the Co0.6 Zn0.4 (OH)F electrode showed an excellent specific capacity of 756 mAh g −1 . The Co0.6 Zn0.4 (OH)F electrode also exhibited an excellent capacitance contribution rate, indicating good rate performance. In addition, the hydroxyl and oxygen vacancies in the electrode material promoted the lithium/dilithium reactions. Therefore, Co0.6 Zn0.4 (OH)F is an excellent lithium storage material with high rate; thus, it has a certain potential application value in the future. Abstract : The samples form overlapping nano needle structure, which increases the specific surface area and active center, so that the electrode material has high specific capacity at high current density.