We demonstrate that failure of time-invariance assumption in the modeling of electrochemical systems by equivalent circuits can lead to the formation of low frequency "inductive loops" that manifest themselves as positive imaginary parts of the impedance function. Assuming that the properties of the equivalent circuits change slowly in time we perform an asymptotic analysis and obtain a new integral representation of the impedance function that reduces to the standard one at high frequencies, while exhibiting inductive loops at low frequencies.
Accelerating Electrochemical Impedance Spectroscopy Measurements by Reducing Reliance on Noisy Low-Frequency Data
University of Toronto（多伦多大学）；SEKISUI CHEMICAL CO., LTD（积水化学工业株式会社）；National Research Council Canada（加拿大国家研究委员会）；Schwartz Reisman Institute for Technology and Society（施瓦茨·莱斯曼技术与社会研究所）；Acceleration Consortium, University of Toronto（加速联盟，多伦多大学）；CanmetMATERIALS, Natural Resources Canada（加拿大自然资源部CanmetMATERIALS材料研究中心）；Vector Institute for Artificial Intelligence（向量人工智能研究所）
Molecular interpretability of the bulk electrochemical impedance of concentrated electrolytes
Yusuf Hamied Department of Chemistry, University of Cambridge（剑桥大学尤素夫·哈米德化学系）；Department of Chemistry, Durham University（杜伦大学化学系）；Sorbonne Université, CNRS, Physical Chemistry of Electrolytes and Interfacial Nanosystems (PHENIX)（索邦大学，法国国家科学研究中心，电解质和界面纳米系统物理化学（PHENIX））；Réseau sur le Stockage Electrochimique de l’Energie (RS2E), FR CNRS 3459（电化学储能网络（RS2E），FR CNRS 3459）
Revealing the interfacial kinetic mechanisms in high-entropy doped Na$_3$V$_2$(PO$_4$)$_3$ through electrochemical investigation and distribution of relaxation times
Electrochemical Analysis of Na$_{0.74}$Co$_{1-x}$Nb$_x$O$_2$ ($x=$ 0, 0.05) as Cathode Materials in Sodium-ion Batteries
钠离子电池（SIB）由于钠的大量可用性和低成本而作为能量存储应用的有前途的替代品受到了极大的关注。本文研究了用固相反应法合成的Na $_{0.74}$ Co $_{1-x}$ Nb $_x$ O $_2$（$x=$ 0和0.05样品）的电化学行为。Rietveld精修的X-射线衍射图揭示了六方晶体对称性与P63/mmc空间群。Na $_{0.74}$ Co $_{0.95}$ Nb $_{0.05}$ O $_2$阴极在6 mAg $^{-1}$的电流密度下表现出约91 mAhg $^{-1}$的比容量，而Na $_{0.74}$ CoO $_2$表现出相对低的比容量（在6 mAg $^{-1}$的电流密度下为70 mAhg $^{-1}$）。进行循环伏安法（CV）和电子阻抗谱（EIS）以确定Na的扩散系数，发现其在10 $^{-10}$ cm $^2$ s $^{-1}$的范围内。
Electrochemical performance and diffusion kinetics of a NASICON type Na$_{3.3}$Mn$_{1.2}$Ti$_{0.75}$Mo$_{0.05}$(PO$_4$)$_3$/C cathode for low-cost sodium-ion batteries
