A bipolar ion diode consists of two positively and negatively charged surfaces that show the distribution of specific ions under different applied voltages. One of the most important electrokinetic phenomena occurring in bipolar nanopores is ionic current rectification (ICR). ICR in nanopores occur when, by applying a voltage to both ends of a nanochannel, the system exhibits non-linear current-voltage behavior or diode-like behavior, in other words, ionic current occurs in a specific direction. In modeling bipolar soft nanochannels, it is usually assumed that the properties of the soft layer and the electrolyte are the same, which is not true for soft layers with high charge densities. In the present work, the effect of sharp and wide aperture radius of nanochannels on ionic current rectification in bipolar nanochannels by coating polyelectrolytic layer with conical geometry in different values of soft layer lengths was studied. For this purpose, by adopting a numerical calculation approach Finite element, Poisson-Nernst-Planck and Navier-Stokes equations were solved for steady-state by considering different permeability values, diffusion coefficient, and dynamic viscosity for polyelectrolyte and electrolyte In general, it can be concluded that the bipolar conical nanopore has a higher ICR than the cylinder geometry with the same average radius If the junction is at the tip of the nanopore. For example, when the mole concentration was equal to $c_0=50\text{mM}$, the ICR for the bipolar conical nanopore with a soft layer with an optimal junction at the tip of the nanopore reached 45, while in the bipolar cylindrical nanopore at best (the optimal junction in the middle of the nanopore) reached 25.

双极离子二极管由两个带正电和带负电的表面组成，它们显示了特定离子在不同施加电压下的分布。双极纳米孔中最重要的电动现象之一是离子电流整流（ICR）。当通过向纳米通道的两端施加电压，系统表现出非线性的电流-电压行为或类似二极管的行为，即离子电流在特定方向上发生时，就会发生纳米孔中的 ICR。在对双极软纳米通道进行建模时，通常假设软层和电解质的性质相同，但对于具有高电荷密度的软层而言，情况并非如此。在目前的工作中，通过在不同软层长度值下涂覆具有锥形几何形状的聚电解质层，研究了纳米通道的尖锐和宽孔径半径对双极纳米通道中离子电流整流的影响。为此，采用数值计算方法，有限元、Poisson-Nernst-Planck 和 Navier-Stokes 方程通过考虑聚电解质和电解质的不同渗透率值、扩散系数和动态粘度来求解稳态。一般来说，它可以可以得出结论，如果结位于纳米孔的尖端，则双极锥形纳米孔比具有相同平均半径的圆柱几何形状具有更高的 ICR。例如，当摩尔浓度等于 采用数值计算方法 有限元、Poisson-Nernst-Planck 和 Navier-Stokes 方程通过考虑聚电解质和电解质的不同渗透率值、扩散系数和动态粘度求解稳态。如果接头位于纳米孔的尖端，则双极锥形纳米孔具有比具有相同平均半径的圆柱几何形状更高的 ICR。例如，当摩尔浓度等于 采用数值计算方法 有限元、Poisson-Nernst-Planck 和 Navier-Stokes 方程通过考虑聚电解质和电解质的不同渗透率值、扩散系数和动态粘度求解稳态。如果接头位于纳米孔的尖端，则双极锥形纳米孔具有比具有相同平均半径的圆柱几何形状更高的 ICR。例如，当摩尔浓度等于 可以得出结论，如果接头位于纳米孔的尖端，则双极锥形纳米孔比具有相同平均半径的圆柱几何形状具有更高的 ICR。例如，当摩尔浓度等于 可以得出结论，如果接头位于纳米孔的尖端，则双极锥形纳米孔比具有相同平均半径的圆柱几何形状具有更高的 ICR。例如，当摩尔浓度等于$C_0=50\text{毫米}$, 具有软层的双极锥形纳米孔的 ICR 达到了 45, 而在双极圆柱形纳米孔中, 最好的 (纳米孔中间的最佳连接) 达到了 25。