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Metal-organic frameworks for nanoconfinement of chlorine in rechargeable lithium-chlorine batteries
Joule ( IF 39.8 ) Pub Date : 2023-03-15 , DOI: 10.1016/j.joule.2023.02.010
Yan Xu, Long Jiao, Jiale Ma, Pan Zhang, Yongfu Tang, Lingmei Liu, Ying Liu, Honghe Ding, Jifei Sun, Mingming Wang, Zhenyu Li, Hai-Long Jiang, Wei Chen

Metal-organic frameworks (MOFs) with functional groups are developed for the nanoconfinement of chlorine by chemisorption in a rechargeable Li-Cl2 battery. Predicted by theoretical calculations, highly porous MOF functionalized with –NH2 groups, namely UiO-66-NH2, is screened out as a model to apply in the Li-Cl2 battery. The Li-Cl2 battery using NH2-functionalized MOF (Li-Cl2@MOF) demonstrates high specific capacities of up to 2,000 mAh/g and is highly stable for 500 cycles under a specific capacity of 1,000 mAh/g at room temperature. It also exhibits superior low-temperature performance, displaying a high voltage of 3.5 V and a Coulombic efficiency (CE) of 99.7% with 300 stable cycles under a capacity of 1,000 mAh/g at −25°C. Furthermore, the Li-Cl2@MOF cell exhibits a high areal capacity of 4.4 mAh/cm2 in coin cells and a CE of 99% for over 120 cycles in large-scale pouch cells. This work provides opportunities for the promising application of functionalized MOFs as cathodes in rechargeable Li-Cl2 batteries.



中文翻译:

用于可充电锂氯电池中氯纳米限制的金属有机框架

开发了具有官能团的金属有机骨架 (MOF),用于通过化学吸附在可充电 Li-Cl 2电池中对氯进行纳米限制。通过理论计算预测,筛选出具有-NH 2基团功能化的高多孔MOF,即UiO-66-NH 2作为模型应用于Li-Cl 2电池。使用NH 2功能化MOF(Li- Cl 2@MOF) 表现出高达 2,000 mAh/g 的高比容量,并且在室温下以 1,000 mAh/g 的比容量循环 500 次时高度稳定。它还具有出色的低温性能,在-25°C 下,在 1,000 mAh/g 的容量下,显示出 3.5 V 的高电压和 99.7% 的库仑效率 (CE) 以及 300 次稳定循环。此外,Li-Cl 2 @MOF 电池在纽扣电池中表现出 4.4 mAh/cm 2的高面积容量,在大型软包电池中表现出超过 120 个循环的 99% 的 CE。这项工作为功能化 MOF 作为可充电 Li-Cl 2电池中的阴极的有前途的应用提供了机会。

更新日期:2023-03-15
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