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Electrochemically Exfoliated Phosphorene–Graphene Hybrid for Sodium‐Ion Batteries
Small Methods ( IF 10.7 ) Pub Date : 2018-10-15 , DOI: 10.1002/smtd.201800328 Honglei Shuai 1 , Peng Ge 1 , Wanwan Hong 1 , Sijie Li 1 , Jiugang Hu 2 , Hongshuai Hou 1 , Guoqiang Zou 1 , Xiaobo Ji 1
Small Methods ( IF 10.7 ) Pub Date : 2018-10-15 , DOI: 10.1002/smtd.201800328 Honglei Shuai 1 , Peng Ge 1 , Wanwan Hong 1 , Sijie Li 1 , Jiugang Hu 2 , Hongshuai Hou 1 , Guoqiang Zou 1 , Xiaobo Ji 1
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Black phosphorus, an attractive anode material for sodium‐ion batteries (SIBs), has aroused grand attention because of its high theoretical capacity. Nevertheless, its practical exploration is limited by large volume swelling, followed by rapid capacity decaying. Herein, both large‐area few‐layer phosphorene and low‐defect graphene are obtained by electrochemical exfoliation. The sandwich‐structured phosphorene–graphene hybrid with the simultaneous introduction of PC and POC bonds through chemical activation is employed to heighten the performance of SIBs, leading to a high specific capacity of 2311 mA h g−1 (based on the mass of phosphorene) at 0.1 A g−1 with a capacity retention of 83.9% after 100 loops, which can be ascribed to the flexible space of graphene layers that alleviates the volumetric expansion of phosphorene. Moreover, the stable chemical bonds as the bridge for electrons transferring can immobilize phosphorene and protect phosphorene from cracking during the sodiation/desodiation process. Expectedly, the anode exhibits excellent cycle performance of 200 loops with retained capacities of 1582.6 and 1120.6 mA h g−1 at 1 and 5 A g−1, respectively. Therefore, this electrochemical approach provides a guide for the preparation of other sandwiched 2D materials, which can be applied in high‐performance energy‐storage devices.
中文翻译：
钠离子电池用电化学剥脱的磷-石墨烯杂化物
黑磷是钠离子电池（SIB）的一种有吸引力的负极材料，由于其理论容量高而引起了广泛的关注。然而，它的实际探索受到大体积膨胀，随后容量快速衰减的限制。在这里，大面积的几层phosphor和低缺陷的石墨烯都是通过电化学剥落获得的。夹层结构的磷杂环己烯的混合与同时引入P的 C和P ö 通过化学激活键被用来提高SIB的性能，从而导致2311毫安Hg的高比容量C -1（基于磷的质量）在0.1 A g -1100次循环后的容量保持率为83.9％，这可以归因于石墨烯层的柔性空间，可减轻磷光体的体积膨胀。此外，稳定的化学键作为电子转移的桥可以在磷化/脱氮过程中固定磷，并保护磷免于破裂。预期地，阳极表现出200个回路的出色循环性能，在1和5 A g -1时的保留容量分别为1582.6和1120.6 mA hg -1。因此，这种电化学方法为其他夹层2D材料的制备提供了指南，这些材料可用于高性能储能设备中。
更新日期：2018-10-15
中文翻译：
钠离子电池用电化学剥脱的磷-石墨烯杂化物
黑磷是钠离子电池（SIB）的一种有吸引力的负极材料，由于其理论容量高而引起了广泛的关注。然而，它的实际探索受到大体积膨胀，随后容量快速衰减的限制。在这里，大面积的几层phosphor和低缺陷的石墨烯都是通过电化学剥落获得的。夹层结构的磷杂环己烯的混合与同时引入P的 C和P ö 通过化学激活键被用来提高SIB的性能，从而导致2311毫安Hg的高比容量C -1（基于磷的质量）在0.1 A g -1100次循环后的容量保持率为83.9％，这可以归因于石墨烯层的柔性空间，可减轻磷光体的体积膨胀。此外，稳定的化学键作为电子转移的桥可以在磷化/脱氮过程中固定磷，并保护磷免于破裂。预期地，阳极表现出200个回路的出色循环性能，在1和5 A g -1时的保留容量分别为1582.6和1120.6 mA hg -1。因此，这种电化学方法为其他夹层2D材料的制备提供了指南，这些材料可用于高性能储能设备中。
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