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A core–shelled Sb@C nanorod cathode with a graphene aerogel interlayer for high-capacity aluminum ion batteries
Nanoscale ( IF 5.8 ) Pub Date : 2022-06-23 , DOI: 10.1039/d2nr02755k Tongge Li 1 , Haoyu Hu 2 , Tonghui Cai 2 , Xiaoqi Liu 1 , Yixun Wang 1 , Liying Wang 1 , Yu Zhang 1 , Wei Xing 2 , Zifeng Yan 1
Nanoscale ( IF 5.8 ) Pub Date : 2022-06-23 , DOI: 10.1039/d2nr02755k Tongge Li 1 , Haoyu Hu 2 , Tonghui Cai 2 , Xiaoqi Liu 1 , Yixun Wang 1 , Liying Wang 1 , Yu Zhang 1 , Wei Xing 2 , Zifeng Yan 1
Affiliation
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Rechargeable aluminum-ion batteries, RAIBs, as a prime candidate for next-generation batteries, have attracted much attention due to their extremely high anode capacity and good safety. However, the lack of matching high-capacity cathode materials and reasonable design limit their practical development. Herein, core–shelled Sb@C nanorods are prepared by polymer coating and thermal reduction as a metal-based cathode for RAIBs. The carbon shell and graphene aerogel interlayer effectively block the diffusion and shuttling of charging products, thus exhibiting excellent electrochemical performance. This Al–Sb battery delivers an initial discharge capacity of 656 mA h g−1 at 100 mA g−1, a stable discharge voltage of 0.9 V, and excellent cycling stability maintained at 306 mA h g−1 after 500 cycles at 1 A g−1. Serial characterizations are used to monitor the structural changes of Sb in reversible reactions and to determine the configuration of the charged products, showing that the product exists in the form of [SbCl4]+ cations, that is, a five-electron transfer reaction occurs with a very high theoretical capacity (1100 mA h g−1). This study sheds light on the energy storage mechanism of a metallic Sb cathode in RAIBs, and provides new insights into the study of high-capacity cathodes and the rational design of battery structures.
中文翻译：
用于高容量铝离子电池的具有石墨烯气凝胶夹层的核壳 Sb@C 纳米棒阴极
可充电铝离子电池RAIBs作为下一代电池的主要候选者，因其极高的阳极容量和良好的安全性而备受关注。然而，缺乏匹配的高容量正极材料和合理的设计限制了它们的实际发展。在此，核壳 Sb@C 纳米棒是通过聚合物涂层和热还原制备的，作为 RAIB 的金属基阴极。碳壳和石墨烯气凝胶夹层有效地阻挡了充电产物的扩散和穿梭，从而表现出优异的电化学性能。这种 Al-Sb 电池在 100 mA g -1下提供 656 mA hg -1的初始放电容量、0.9 V 的稳定放电电压以及保持在 306 mA hg 的出色循环稳定性-1在 1 A g -1下 500 次循环后。序列表征用于监测Sb在可逆反应中的结构变化并确定带电产物的构型，表明产物以[SbCl 4 ] +阳离子的形式存在，即发生五电子转移反应具有非常高的理论容量（1100 mA hg -1）。本研究揭示了金属锑正极在 RAIBs 中的储能机制，并为高容量正极的研究和电池结构的合理设计提供了新的见解。
更新日期：2022-06-23
中文翻译：
用于高容量铝离子电池的具有石墨烯气凝胶夹层的核壳 Sb@C 纳米棒阴极
可充电铝离子电池RAIBs作为下一代电池的主要候选者，因其极高的阳极容量和良好的安全性而备受关注。然而，缺乏匹配的高容量正极材料和合理的设计限制了它们的实际发展。在此，核壳 Sb@C 纳米棒是通过聚合物涂层和热还原制备的，作为 RAIB 的金属基阴极。碳壳和石墨烯气凝胶夹层有效地阻挡了充电产物的扩散和穿梭，从而表现出优异的电化学性能。这种 Al-Sb 电池在 100 mA g -1下提供 656 mA hg -1的初始放电容量、0.9 V 的稳定放电电压以及保持在 306 mA hg 的出色循环稳定性-1在 1 A g -1下 500 次循环后。序列表征用于监测Sb在可逆反应中的结构变化并确定带电产物的构型，表明产物以[SbCl 4 ] +阳离子的形式存在，即发生五电子转移反应具有非常高的理论容量（1100 mA hg -1）。本研究揭示了金属锑正极在 RAIBs 中的储能机制，并为高容量正极的研究和电池结构的合理设计提供了新的见解。
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