Decoupling the air sensitivity of Na-layered oxides

• 成果类型: Article
• 署名作者: Yang, Yang; Wang, Zaifa; Du, Congcong; Wang, Bowen; Li, Xinyan; Wu, Siyuan; Li, Xiaowei; Zhang, Xiao; Wang, Xubin; Niu, Yaoshen; Ding, Feixiang; Rong, Xiaohui; Lu, Yaxiang; Zhang, Nian; Xu, Juping; Xiao, Ruijuan; Zhang, Qinghua; Wang, Xuefeng; Yin, Wen; Zhao, Junmei; Chen, Liquan; Huang, Jianyu; Hu, Yong-Sheng
• 署名单位: Chinese Academy of Sciences; Institute of Physics, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Yanshan University; Institute of Process Engineering, CAS; Chinese Academy of Sciences; Chinese Academy of Sciences; Chinese Academy of Sciences; Shanghai Institute of Microsystem & Information Technology, CAS; Chinese Academy of Sciences; Institute of High Energy Physics, CAS
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-12022
• DOI: 10.1126/science.adm9223
• 发表日期: 2024-08-16
• 页码: 744-752
• 关键词: cathode materials; ion batteries; lithium; nani1/3fe1/3mn1/3o2; insertion; storage; ni

摘要

Air sensitivity remains a substantial barrier to the commercialization of sodium (Na)-layered oxides (NLOs). This problem has puzzled the community for decades because of the complexity of interactions between air components and their impact on both bulk and surfaces of NLOs. We show here that water vapor plays a pivotal role in initiating destructive acid and oxidative degradations of NLOs only when coupled with carbon dioxide or oxygen, respectively. Quantification analysis revealed that reducing the defined cation competition coefficient (eta), which integrates the effects of ionic potential and sodium content, and increasing the particle size can enhance the resistance to acid attack, whereas using high-potential redox couples can eliminate oxidative degradation. These findings elucidate the underlying air deterioration mechanisms and rationalize the design of air-stable NLOs.