Abstract An easy and facile hydrothermal method is presented to synthesize hybrid materials of hollow mesoporous Zn0.76Co0.24S nanospheres anchored on reduced graphene oxide (rGO) sheets (Zn0.76Co0.24S@N/S-rGO), in which the obtained Zn0.76Co0.24S nanospheres are composed of numerous nanoparticles. Being evaluated as anode materials for lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs), the Zn0.76Co0.24S@N/S-rGO composites exhibited a high reversible capacity of 804 and 605 mA h g−1 at the current density of 1 A g−1 after 500 cycles for LIBs and SIBs, respectively. The excellent electrochemical performance of Zn0.76Co0.24S@N/S-rGO composites originates from the synergistic effect between hollow Zn0.76Co0.24S nanospheres and reduction graphene, as well as the void spaces between the neighbouring nanoparticles of Zn0.76Co0.24S providing large contact areas with electrolyte and buffer zone to accommodate the volume variation during the cycling process.

中文翻译：

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将 Zn0.76Co0.24S 与 S 掺杂的石墨烯结合作为锂离子和钠离子电池的高性能负极材料

摘要 提出了一种简单易行的水热法合成中空介孔 Zn0.76Co0.24S 纳米球的杂化材料，其锚定在还原氧化石墨烯 (rGO) 片 (Zn0.76Co0.24S@N/S-rGO) 上，其中获得的 Zn0 .76Co0.24S 纳米球由许多纳米粒子组成。作为锂离子电池（LIBs）和钠离子电池（SIBs）的负极材料，Zn0.76Co0.24S@N/S-rGO 复合材料表现出 804 和 605 mA hg-1 的高可逆容量LIBs 和 SIBs 在 500 次循环后的电流密度分别为 1 A g-1。Zn0.76Co0.24S@N/S-rGO复合材料优异的电化学性能源于中空Zn0.76Co0.24S纳米球与还原石墨烯之间的协同作用，以及相邻的Zn0.76Co0纳米颗粒之间的空隙空间。