Estimation of cross-characterized EIS parameters of asymmetric supercapacitors based on double-layer machine learning

ZHAO Yibing; LI Yiduo; ZHOU Yuhuan; ZUO Zhihui; WANG Hanbo; WANG Yan; TIAN Yumei; LU Haiyan; LIU Changying

doi:10.19799/j.cnki.2095-4239.2026.0269

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Estimation of cross-characterized EIS parameters of asymmetric supercapacitors based on double-layer machine learning

Special Issue of Key Materials and Devices of Supercapacitors | 更新时间：2026-07-01

- Estimation of cross-characterized EIS parameters of asymmetric supercapacitors based on double-layer machine learning
- Energy Storage Science and Technology Vol. 15, Issue 5, Pages: 1694-1703(2026)
- 作者机构：
  
  1.吉林大学化学学院，吉林长春 130012
  2.吉林大学仪器科学与电气工程学院，吉林长春 130012
- 作者简介：
- 基金信息：
- DOI：10.19799/j.cnki.2095-4239.2026.0269
  CLC： TM 53
- Received：31 March 2026，
  
  Revised：2026-04-14，
  
  Published：28 May 2026
- 稿件说明：
移动端阅览
赵一冰, 李艺多, 周瑜欢, 等. 基于双层机器学习的非对称超级电容器跨表征EIS参数估计[J]. 储能科学与技术, 2026, 15(5): 1694-1703.

ZHAO Yibing, LI Yiduo, ZHOU Yuhuan, et al. Estimation of cross-characterized EIS parameters of asymmetric supercapacitors based on double-layer machine learning[J]. Energy Storage Science and Technology, 2026, 15(5): 1694-1703.
赵一冰, 李艺多, 周瑜欢, 等. 基于双层机器学习的非对称超级电容器跨表征EIS参数估计[J]. 储能科学与技术, 2026, 15(5): 1694-1703. DOI： 10.19799/j.cnki.2095-4239.2026.0269.

ZHAO Yibing, LI Yiduo, ZHOU Yuhuan, et al. Estimation of cross-characterized EIS parameters of asymmetric supercapacitors based on double-layer machine learning[J]. Energy Storage Science and Technology, 2026, 15(5): 1694-1703. DOI： 10.19799/j.cnki.2095-4239.2026.0269.

摘要

电化学阻抗谱（EIS）是表征非对称超级电容器动力学特性的关键技术。然而，在表征高噪声的电极材料时，传统的非线性最小二乘法常因为难以获取准确的阻抗参数初值而导致拟合失准。为解决这一难题，本工作提出了一种基于跨表征融合与双层集成机器学习架构的EIS参数智能辨识方法。该方法深度提取循环伏安与恒流充放电曲线中的物理信息来构建特征矩阵，建立其与EIS关键参数（如内阻、恒相位元件等）之间的可解释映射关系，通过潜变量提取和时序归一化方法对全量特征进行降维和增强，构建XGBoost、随机森林、岭回归、ENR集成的双层机器学习架构进行训练，最终实现高精度的跨表征EIS参数估计。实验结果表明，所提方法的估计结果与直接基于EIS特征的估计结果高度一致，在钴锰基等材料体系中展现出跨材料体系的高度稳定性。本研究不仅为非对称超级电容器的EIS拟合提供可靠的初值估计策略，显著提升了拟合的收敛性与准确度，同时也为高噪声条件下的电化学阻抗参数辨识提供了新思路。

Abstract

Electrochemical impedance spectroscopy (EIS) is a crucial technique for characterizing the dynamic properties of asymmetric supercapacitors. However

for electrode materials with high noise levels

the traditional nonlinear least-squares method often fails to yield accurate fits owing to the difficulty in determining reliable initial impedance parameters. To address this challenge

this study proposes an intelligent EIS parameter identification method based on cross-characterization fusion and a two-layer machine learning architecture. This approach extracts physicochemical information from cyclic voltammetry and constant-current charge-discharge curves to construct a

feature matrix

establishing an interpretable mapping between these features and key EIS parameters (

e.g.

internal resistance and constant phase element parameters). After dimensionality reduction and feature enhancement through latent variable extraction and time-series normalization

a two-layer machine learning architecture integrating XGBoost

random forest

ridge regression

and elastic net regression is developed for training

enabling high-precision cross-characterization-based EIS parameter estimation. Experimental results demonstrate that the predicted parameters closely align with those derived directly from EIS

with high stability across different material systems

including cobalt-manganese-based electrodes. This study provides a reliable strategy for initializing EIS fitting in asymmetric supercapacitors

significantly improving convergence and accuracy

and offers a practical approach for identifying electrochemical impedance parameters under high-noise conditions.

关键词

Keywords

references

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