Buğday Nesrin, Wang Haoji, Hong Ningyun, Zhang Baichao, Deng Wentao, Zou Guoqiang, Hou Hongshuai, Yaşar Sedat, Ji Xiaobo
Faculty of Science and Art, Department of Chemistry, İnönü University, Malatya, 44280, Turkey.
College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, China.
Small. 2024 Nov;20(44):e2403736. doi: 10.1002/smll.202403736. Epub 2024 Jul 11.
Transition metal selenides (TMSs) are receiving considerable interest as improved anode materials for sodium-ion batteries (SIBs) and lithium-ion batteries (LIBs) due to their considerable theoretical capacity and excellent redox reversibility. Herein, ZIF-12 (zeolitic imidazolate framework) structure is used for the synthesis of CuSe/CoSe@NPC anode material by pyrolysis of ZIF-12/Se mixture. When CuSe/CoSe@NPC composite is utilized as an anode electrode material in LIB and SIB half cells, the material demonstrates excellent electrochemical performance and remarkable cycle stability with retaining high capacities. In LIB and SIB half cells, the CuSe/CoSe@NPC anode material shows the ultralong lifespan at 2000 mAg, retaining a capacity of 543 mAhg after 750 cycles, and retaining a capacity of 251 mAhg after 200 cycles at 100 mAg, respectively. The porous structure of the CuSe/CoSe@NPC anode material can not only effectively tolerate the volume expansion of the electrode during discharging and charging, but also facilitate the penetration of electrolyte and efficiently prevents the clustering of active particles. In situ X-ray difraction (XRD) analysis results reveal the high potential of CuSe/CoSe@NPC composite in building efficient LIBs and SIBs due to reversible conversion reactions of CuSe/CoSe@NPC for lithium-ion and sodium-ion storage.
过渡金属硒化物（TMSs）因其可观的理论容量和出色的氧化还原可逆性，作为钠离子电池（SIBs）和锂离子电池（LIBs）性能更优的负极材料而备受关注。在此，通过对ZIF-12/Se混合物进行热解，利用ZIF-12（沸石咪唑酯骨架）结构合成了CuSe/CoSe@NPC负极材料。当将CuSe/CoSe@NPC复合材料用作LIB和SIB半电池中的负极电极材料时，该材料展现出优异的电化学性能和出色的循环稳定性，并能保持高容量。在LIB和SIB半电池中，CuSe/CoSe@NPC负极材料在2000 mAg下表现出超长寿命，在750次循环后保持543 mAhg的容量，在100 mAg下200次循环后分别保持251 mAhg的容量。CuSe/CoSe@NPC负极材料的多孔结构不仅能有效耐受电极在充放电过程中的体积膨胀，还能促进电解质的渗透并有效防止活性颗粒的聚集。原位X射线衍射（XRD）分析结果表明，由于CuSe/CoSe@NPC在锂离子和钠离子存储方面的可逆转化反应，其在构建高效LIBs和SIBs方面具有很大潜力。
