Hongsheng Jia*, Zhimeng Zhang, Siqi Li, Miao Han, Yuanlong E, Chunbo Liu*, Qingshuang Wang* and Wanqiang Liu,
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引用次数: 0
摘要
由于锂资源的不断枯竭和有机电解质存在燃烧、爆炸等安全隐患,开发一种适应社会发展和进步的能量积累系统迫在眉睫。使用水性电解质的锌离子电池具有安全性高、成本低、环境友好等优点,是替代锂离子电池的下一代理想储能系统。在锌离子电池正极材料中,锰基材料和碳材料分别占据主要地位。其中,锰酸镍(NiMn2O4)纳米片和碳纳米管(CNTs)作为活性材料受到广泛关注。CNT 可提供电子导电通道,而 NiMn2O4 纳米片则为电化学反应提供了更多的活性点。具有多孔结构的碳外壳还能改善电子传输和离子传导过程,因此镍锰酸盐/碳纳米管(NiMn2O4/CNTs)纳米复合材料在 0.2 A g-1 的电流密度下获得了 333.6 mAh g-1 的高比电容。在 0.5 A g-1 的电流密度下循环 500 次后,比容量达到 73.6 mAh g-1,表明该材料具有优异的综合电化学性能。镍锰氧化物/碳纳米管纳米复合材料的结构设计与电化学活化相结合的协同策略可为其他锰基阴极材料提供参考。
NiMn2O4 Nanosheet/Carbon Nanotube Composites for Aqueous Zinc-Ion Batteries
Due to the continuous depletion of lithium resources and the security risks of organic electrolytes such as combustion and explosion, there is an imminent requirement to develop a type of energy accumulation system to adapt to the progression and progress of society. Zinc-ion batteries using aqueous electrolyte have the advantages of high safety, low cost, and environmental friendliness, which make them an ideal alternative to lithium-ion batteries as a next-generation energy storage system. Among the zinc-ion battery cathode materials, manganese-based materials and carbon materials occupy the main positions, respectively. Among them, nickel manganate (NiMn2O4) nanosheets and carbon nanotubes (CNTs) as active materials have received extensive attention. The CNTs could provide electronic conductive channels and NiMn2O4 nanosheets supply more active points for electrochemical reactions. The carbon shell with a porous structure also improves the electron transport and ionic conduction processes, so that the nickel manganate/carbon nanotube (NiMn2O4/CNTs) nanocomposites obtained a high specific capacitance of 333.6 mAh g–1 at a current density of 0.2 A g–1. After 500 cycles at a current density of 0.5 A g–1 led to a high specific capacity of 73.6 mAh g–1, it was shown that the material exhibits excellent comprehensive electrochemical properties. This synergistic strategy of combining structural design and electrochemical activation in NiMn2O4/CNTs nanocomposites can be a reference for other manganese-based cathode materials.
期刊介绍:
ACS Applied Nano Materials is an interdisciplinary journal publishing original research covering all aspects of engineering, chemistry, physics and biology relevant to applications of nanomaterials. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important applications of nanomaterials.