锂离子电池以其高能量密度、合理的材料成本和较绿色的环保特性,已经成为电动汽车和电子产品等便携式动力装置的重要能源,但目前常用的镍钴锰三元正极材料(NCM)在电化学性能方面存在一定的缺陷。本文主要研究了Ba2+的掺杂对LiNi0.8Co0.1Mn0.1O2材料性能的影响。采用X射线衍射(XRD)分析了样品的相结构和结晶性,通过扫描电子显微镜(SEM)和透射电子显微镜(TEM)以及X射线能量色散光谱仪(EDS),对样品的形貌和元素组成进行了表征分析。通过电化学性能测试,我们发现Ba2+掺杂能够有效提升三元正极材料的比容量和循环稳定性,为改善三元正极材料提供了新的思路与依据。Lithium-ion batteries are characterized by their high energy density, reasonable material cost, and environmentally friendly features, and have become important energy sources for portable power devices like electric vehicles and electronics. However, the commonly used nickel-cobalt-manganese (NCM) ternary cathode materials have certain deficiencies in electrochemical performance. This study mainly investigates the effect of Ba2+ doping on the performance of LiNi0.8Co0.1Mn0.1O2 materials. The phase structure and crystallinity of the samples were analyzed using X-ray diffraction (XRD). Scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray energy dispersive spectroscopy (EDS) were employed to characterize the morphology and elemental composition of the samples. Through electrochemical performance testing, we found that Ba2+ doping effectively enhances the specific capacity and cycling stability of the ternary cathode materials, providing new insights and evidence for improving their performance.
文章研发了一种准确、快捷、方便测定钡离子的差分脉冲伏安法:在加入5 mg/L Hg离子和0.02 M KCl的酸性电解质溶液中,采用差分脉冲伏安法分析技术,在玻碳电极上完成钡离子的富集和测定。研究富集电位、富集时间、扫描速率等差分脉冲伏安法参数对测量的影响。结果表明,通过对差分脉冲参数和测量体系的优化,可实现痕量钡离子的定量分析。该方法检测限LOD=1.72μg/L,定量检测下限LOQ=5.7μg/L。该方法与ICP-MS的样品检测结果对比分析显示,二者之间不存在显著性差异。该方法可广泛用于地表水、地下水和海水等水质钡的准确检测,该方法结合上海科泽K301-HM在线监测仪器,可实时在线监控水中钡离子。
