Jia Bingxin, Liu Wenhui, Yao Chan, Xie Wei, Xu Yanhong
Key Laboratory of Preparation and Applications of Environmental Friendly Materials, Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education (Jilin Normal University), Ministry of Education, Changchun, China.
Chem Commun (Camb). 2024 Jun 18;60(50):6435-6438. doi: 10.1039/d4cc01678e.
Herein, a covalent organic framework (SO-COF) containing sulfonic acid groups has been developed on the surface of alumina by a one-step method, labeled as SO-COF@AlO. The experimental results show that SO-COF@AlO can effectively inhibit the shuttle effect of soluble lithium polysulfide (LiPSs) in LSBs after loading the active material sulfur, and exhibits better cycling behavior than the initial polymer SO-COF. The initial discharge specific capacity of this electrode material at 0.05C is as high as 1141 mA h g, and the capacity can be maintained at 466 mA h g after 500 cycles with a capacity decay rate of 0.08% per cycle.
在此，通过一步法在氧化铝表面制备了一种含磺酸基团的共价有机框架（SO-COF），标记为SO-COF@AlO。实验结果表明，负载活性物质硫后，SO-COF@AlO能有效抑制锂硫电池中可溶性多硫化锂（LiPSs）的穿梭效应，并且比初始聚合物SO-COF表现出更好的循环性能。该电极材料在0.05C下的初始放电比容量高达1141 mA h g，500次循环后容量可维持在466 mA h g，容量衰减率为每循环0.08%。
