Understanding the Impedance Response of Lithium Polysulfide Symmetric Cells

Lithium–sulfur (Li–S) batteries are highly considered for next‐generation energy storage due to their ultrahigh theoretical energy density of 2600 Wh kg−1. The conversion reactions between lithium polysulfides (LiPSs) constitute the core process in working Li–S batteries. Electrochemical impedance s...

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Autores principales:	Yun-Wei Song, Yan-Qi Peng, Meng Zhao, Yang Lu, Jia-Ning Liu, Bo-Quan Li, Qiang Zhang
Formato:	article
Lenguaje:	EN
Publicado:	Wiley-VCH 2021
Materias:	electrochemical impedance spectroscopy equivalent circuits lithium polysulfides lithium–sulfur batteries symmetric cells Materials of engineering and construction. Mechanics of materials TA401-492
Acceso en línea:	https://doaj.org/article/e7a22d5a7aeb48b28e60737a7443af5b
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spelling	oai:doaj.org-article:e7a22d5a7aeb48b28e60737a7443af5b2021-11-16T03:55:58ZUnderstanding the Impedance Response of Lithium Polysulfide Symmetric Cells2688-404610.1002/smsc.202100042https://doaj.org/article/e7a22d5a7aeb48b28e60737a7443af5b2021-11-01T00:00:00Zhttps://doi.org/10.1002/smsc.202100042https://doaj.org/toc/2688-4046Lithium–sulfur (Li–S) batteries are highly considered for next‐generation energy storage due to their ultrahigh theoretical energy density of 2600 Wh kg−1. The conversion reactions between lithium polysulfides (LiPSs) constitute the core process in working Li–S batteries. Electrochemical impedance spectroscopy (EIS) analysis of LiPS symmetric cells is an effective tool to provide detailed information on the LiPS conversion reactions and direct further kinetic promotion. However, reasonable interpretation of the EIS responses is so far insufficiently addressed without a well‐defined equivalent circuit. Herein, a systematic analysis on the EIS responses of LiPS symmetric cells is conducted to provide a comprehensible equivalent circuit. Interfacial contact, surface reaction, and diffusion are decoupled according to their respective characteristic frequency using the distribution of relaxation time analysis method. A well‐defined equivalent circuit is proposed to accurately fit the experimental EIS responses, unambiguously interpret key parameters, and be feasible with a wide range of experimental conditions. This work presents the methodology of understanding the EIS responses of LiPS symmetric cells and inspires analogous analysis on vital electrochemical processes.Yun-Wei SongYan-Qi PengMeng ZhaoYang LuJia-Ning LiuBo-Quan LiQiang ZhangWiley-VCHarticleelectrochemical impedance spectroscopyequivalent circuitslithium polysulfideslithium–sulfur batteriessymmetric cellsMaterials of engineering and construction. Mechanics of materialsTA401-492ENSmall Science, Vol 1, Iss 11, Pp n/a-n/a (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	electrochemical impedance spectroscopy equivalent circuits lithium polysulfides lithium–sulfur batteries symmetric cells Materials of engineering and construction. Mechanics of materials TA401-492
spellingShingle	electrochemical impedance spectroscopy equivalent circuits lithium polysulfides lithium–sulfur batteries symmetric cells Materials of engineering and construction. Mechanics of materials TA401-492 Yun-Wei Song Yan-Qi Peng Meng Zhao Yang Lu Jia-Ning Liu Bo-Quan Li Qiang Zhang Understanding the Impedance Response of Lithium Polysulfide Symmetric Cells
description	Lithium–sulfur (Li–S) batteries are highly considered for next‐generation energy storage due to their ultrahigh theoretical energy density of 2600 Wh kg−1. The conversion reactions between lithium polysulfides (LiPSs) constitute the core process in working Li–S batteries. Electrochemical impedance spectroscopy (EIS) analysis of LiPS symmetric cells is an effective tool to provide detailed information on the LiPS conversion reactions and direct further kinetic promotion. However, reasonable interpretation of the EIS responses is so far insufficiently addressed without a well‐defined equivalent circuit. Herein, a systematic analysis on the EIS responses of LiPS symmetric cells is conducted to provide a comprehensible equivalent circuit. Interfacial contact, surface reaction, and diffusion are decoupled according to their respective characteristic frequency using the distribution of relaxation time analysis method. A well‐defined equivalent circuit is proposed to accurately fit the experimental EIS responses, unambiguously interpret key parameters, and be feasible with a wide range of experimental conditions. This work presents the methodology of understanding the EIS responses of LiPS symmetric cells and inspires analogous analysis on vital electrochemical processes.
format	article
author	Yun-Wei Song Yan-Qi Peng Meng Zhao Yang Lu Jia-Ning Liu Bo-Quan Li Qiang Zhang
author_facet	Yun-Wei Song Yan-Qi Peng Meng Zhao Yang Lu Jia-Ning Liu Bo-Quan Li Qiang Zhang
author_sort	Yun-Wei Song
title	Understanding the Impedance Response of Lithium Polysulfide Symmetric Cells
title_short	Understanding the Impedance Response of Lithium Polysulfide Symmetric Cells
title_full	Understanding the Impedance Response of Lithium Polysulfide Symmetric Cells
title_fullStr	Understanding the Impedance Response of Lithium Polysulfide Symmetric Cells
title_full_unstemmed	Understanding the Impedance Response of Lithium Polysulfide Symmetric Cells
title_sort	understanding the impedance response of lithium polysulfide symmetric cells
publisher	Wiley-VCH
publishDate	2021
url	https://doaj.org/article/e7a22d5a7aeb48b28e60737a7443af5b
work_keys_str_mv	AT yunweisong understandingtheimpedanceresponseoflithiumpolysulfidesymmetriccells AT yanqipeng understandingtheimpedanceresponseoflithiumpolysulfidesymmetriccells AT mengzhao understandingtheimpedanceresponseoflithiumpolysulfidesymmetriccells AT yanglu understandingtheimpedanceresponseoflithiumpolysulfidesymmetriccells AT jianingliu understandingtheimpedanceresponseoflithiumpolysulfidesymmetriccells AT boquanli understandingtheimpedanceresponseoflithiumpolysulfidesymmetriccells AT qiangzhang understandingtheimpedanceresponseoflithiumpolysulfidesymmetriccells
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Understanding the Impedance Response of Lithium Polysulfide Symmetric Cells

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