Multiple heteroatom doping is identified as an effective method to realize superior anode materials for lithium-ion batteries (LIBs). In this study, a novel 4-fold interpenetrated dia MOF was synthesized and characterized and then used as a N,S-containing precursor to fabricate a foam-like CoO@N,S-codoped carbon hybrid composite via thermal treatment. In the composites, the outermost foam-like N,S-codoped carbon matrix can effectively buffer the drastic volume variations, enhance electronic conductivity, and prevent CoO nanoparticles from aggregation and pulverization during discharge/charge processes. Consequently, the novel hybrid nanomaterial exhibited excellent electrochemical properties as an anode material for LIBs. The specific capacity can retain a stable value of about 809 mA h g⁻¹ at a current of 1000 mA g⁻¹ within 500 cycles. As a proof-of-concept application, introduction of heteroatoms into MOFs can offer a valid method for doping the as-derived hybrid composites and then enhancing their performance as anodes of LIBs.

中文翻译：

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精心设计的富含N，S的Co-MOF用于锂离子电池的泡沫状CoO @ N，S掺杂碳复合材料

多重杂原子掺杂被认为是实现锂离子电池（LIB）优质阳极材料的有效方法。在这项研究中，合成并表征了一种新型的4倍互穿的dia MOF，然后将其用作含N，S的前体，以通过热处理。在复合材料中，最外层的泡沫状N，S掺杂碳基体可以有效地缓冲剧烈的体积变化，增强电子电导率并防止CoO纳米粒子在放电/充电过程中聚集和粉碎。因此，新型杂化纳米材料作为LIBs的阳极材料表现出优异的电化学性能。在500个循环内，在1000 mA g ^-1的电流下，比容量可保持约809 mA hg ^-1的稳定值。作为概念验证应用，将杂原子引入MOF可以提供一种有效的方法来掺杂衍生的混合复合材料，然后增强其作为LIB阳极的性能。