Cobalt coordination modified double-schiff-base with low solubility as a long-cycle life anode for sodium-ion batteries
Cobalt coordination modified double-schiff-base with low solubility as a long-cycle life anode for sodium-ion batteries作者机构：Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) Renewable Energy Conversion and Storage Center College of Chemistry Nankai University
出 版 物：《Progress in Natural Science:Materials International》 (自然科学进展·国际材料(英文))
年 卷 期：2022年第32卷第4期
页 面：510-516页
核心收录：
学科分类：0808[工学-电气工程] 07[理学] 08[工学] 070304[理学-物理化学(含∶化学物理)] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学]
基 金：financially supported by the MOST (2016YFA0202500) NSFC (51871123) MOE (IRT13R30) 111 Project (B12015)
主 题：Double-Schiff-base Sodium-ion battery Shuttle effects
摘 要：Sodium-ion batteries（SIBs） have been recently considered as an intriguing candidate for next-generation battery systems with their advantages in large-scale energy storage applications. However, the design of electrode materials of SIBs still suffers from severe volume expansion and low capacity caused by the larger ion radius, high redox potential and heavy atom weight of Na. Organic electrode materials with structural flexibility have attracted great attention recently for their potential in alleviating volume expansion. However, most organic electrode materials suffer from dissolution in electrolytes and consequent capacity fading during the long-term cycling process. In this work, a method coordinating with Co2+was applied to solve the shuttle effect of H4salphdc(N, N -phenylene-bis-（salicylideneimine） dicarboxylic acid). By virtue of the Co2+coordination, the Co（H2salphdc）electrode delivered a desirable discharge capacity of 123 m Ah g-1after 1500 cycles at the current density of 200m A g-1, while the H4salphdc electrode exhibited severe capacity fading. Such excellent electrochemical performance can be credited to the Co2+coordination repressing the electrode dissolution and improving the structure stability.
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