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ZIF-Derived Carbon Nanoframes as a Polysulfide Anchor and Conversion Mediator for High-Performance Lithium–Sulfur Cells
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2021-04-28 , DOI: 10.1021/acsami.1c04194
Rui Wang 1, 2 , Wei Tang 3 , Manqin Tang 1 , Qian Wu 1 , Jing Li 1
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2021-04-28 , DOI: 10.1021/acsami.1c04194
Rui Wang 1, 2 , Wei Tang 3 , Manqin Tang 1 , Qian Wu 1 , Jing Li 1
Affiliation
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Improving the redox kinetics of sulfur species, while suppressing the “shuttle effects” to achieve stable cycling under high sulfur loading is an inevitable problem for lithium–sulfur (Li–S) cells to commercialization. Herein, the three-dimensional Zn, Co, and N codoped carbon nanoframe (3DZCN-C) was successfully synthesized by calcining precursor which protected by mesoporous SiO2 and was used as cathode host for the first time to improve the performance of Li–S cells. Combining the merits of strong lithium polysulfides (LiPSs) anchoring and accelerating the conversion kinetics of sulfur species, 3DZCN-C effectively inhibit the shuttling of LiPSs and achieves excellent cyclability with capacity fading rate of 0.03% per cycle over 1000 cycles. Furthermore, the Li–S pouch cell has been assembled and has been shown to operate reliably with high energy density (>300 Wh kg–1) even under a high sulfur loading of 10 mg cm–2. This work provides a simple and effective way for the promotion and commercial application of Li–S cells.
中文翻译:
ZIF衍生的碳纳米框架作为高性能锂硫电池的聚硫锚和转化介体
锂-硫(Li-S)电池商业化的过程中,改善硫物质的氧化还原动力学,同时抑制“穿梭效应”以在高硫负荷下实现稳定的循环是一个不可避免的问题。本文中,通过煅烧介孔SiO 2保护的前驱体成功合成了三维Zn,Co和N共掺杂碳纳米框架(3DZCN-C)。并首次用作阴极主体,以改善Li–S电池的性能。3DZCN-C结合了强大的多硫化锂(LiPS)锚固和加速硫物质转化动力学的优点,有效抑制了LiPS的穿梭并实现了出色的可循环性,在1000次循环中每循环的容量衰减率为0.03%。此外,Li–S袋式电池已经组装好,并且显示出即使在10 mg cm –2的高硫负荷下也能以高能量密度(> 300 Wh kg –1)可靠地运行。这项工作为Li-S细胞的推广和商业应用提供了一种简单有效的方法。
更新日期:2021-05-12
中文翻译:
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ZIF衍生的碳纳米框架作为高性能锂硫电池的聚硫锚和转化介体
锂-硫(Li-S)电池商业化的过程中,改善硫物质的氧化还原动力学,同时抑制“穿梭效应”以在高硫负荷下实现稳定的循环是一个不可避免的问题。本文中,通过煅烧介孔SiO 2保护的前驱体成功合成了三维Zn,Co和N共掺杂碳纳米框架(3DZCN-C)。并首次用作阴极主体,以改善Li–S电池的性能。3DZCN-C结合了强大的多硫化锂(LiPS)锚固和加速硫物质转化动力学的优点,有效抑制了LiPS的穿梭并实现了出色的可循环性,在1000次循环中每循环的容量衰减率为0.03%。此外,Li–S袋式电池已经组装好,并且显示出即使在10 mg cm –2的高硫负荷下也能以高能量密度(> 300 Wh kg –1)可靠地运行。这项工作为Li-S细胞的推广和商业应用提供了一种简单有效的方法。