锂离子电池具有高吸碘性的共价有机框架：释放危险废物的潜力,ACS Materials Letters

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锂离子电池具有高吸碘性的共价有机框架：释放危险废物的潜力
ACS Materials Letters ( IF 9.6 ) Pub Date : 2023-08-09 , DOI: 10.1021/acsmaterialslett.3c00443
Satyam Saurabh _{1,

2} , Samraj Mollick ₂ , Yogeshwar D. More ₂ , Abhik Banerjee ₃ , Sahel Fajal ₂ , Nikhil Kumar ₃ , Mandar M. Shirolkar ₄ , Satishchandra B. Ogale _{1,

3} , Sujit K. Ghosh ₂

Affiliation

危险废物的管理是全球迫在眉睫的问题，而改善此类废物的斗争还远未结束，因为工业化和人口的快速增长不断产生危险废物。由于缺乏适当的方法和来自水相和气相的材料，同时捕获此类危险废物并在可持续能源应用中同时利用仍然是材料领域的最终愿望。在此，设计了一种新的具有成本效益且可扩展的路线来合成用于碘螯合的强大的共价有机框架（COF-TCO）。由此产生的吸附剂可以选择性地从水中捕获超过 98% 的痕量 I ₃^–并具有优异的分配系数 ( K_d ∼ 10 ⁴ mL/g)，显示出对碘的强亲和力。^{4.92 gg –1}的高吸收能力在气相中观察到了这种现象，并且在多种水系统中都实现了高效的性能，包括饮用水、湖水、河水和海水。广泛的实验引导计算研究揭示了超高的碘选择性带来了随之而来的机制理解。重要的是，捕获碘的 COF-TCO 用于锂离子电池应用，当针对锂金属阳极进行测试时，它表现出 120 mAh/g 的适度比容量。危险和废物积累的阴极材料结合了安全性和可持续性，可以帮助扩大锂碘电池用于实际储能的可行性。

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Covalent Organic Framework Featuring High Iodine Uptake for Li-Ion Battery: Unlocking the Potential of Hazardous Waste

Management of hazardous waste is a pressing global concern, and the battle to ameliorate such waste is far from over, since it is continuously generated by the rapid growth of industrialization and the human population. Simultaneous capture of such hazardous waste and concurrent utilization in a sustainable energy application still remain the ultimate aspiration in the material field due to lack of appropriate methodology and materials from both water and the vapor phase. Herein, a new cost-effective and scalable route has been designed to synthesize a robust covalent organic framework (COF-TCO) that has been employed for iodine sequestration. The resulting adsorbent selectively captures over 98% of a trace amount of I₃^– from water with an excellent distribution coefficient (K_d ∼ 10⁴ mL/g), revealing a strong affinity toward iodine. The high uptake capacity of 4.92 gg^–1 was observed in the vapor phase, and efficient performance was achieved over a wide range of water systems, including potable water, lake water, river water, and seawater. Extensive experimentally guided computational studies revealed ultrahigh iodine selectivity brings out the attendant mechanistic understanding. Importantly, the iodine-captured COF-TCO was utilized for Li-ion battery applications, and it exhibited a modest specific capacity of 120 mAh/g, when tested against a lithium metal anode. The viability of scaling up lithium–iodine batteries for practical energy storage can be aided by hazardous and waste accumulated cathode materials combining safety and sustainability.

更新日期：2023-08-09

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