Decoupling Accurate Electrochemical Behaviors for High-Capacity Electrodes via Reviving Three-Electrode Vehicles

Nan Qin; Liming Jin; Guangguang XingQiang WuJunsheng ZhengCunman ZhangZonghai ChenJim P. Zheng

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Decoupling Accurate Electrochemical Behaviors for High-Capacity Electrodes via Reviving Three-Electrode Vehicles

机译：Decoupling Accurate Electrochemical Behaviors for High-Capacity Electrodes via Reviving Three-Electrode Vehicles

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Developing high-capacity electrodes requires the evaluation of electrochemicalbehaviors with an increasing current density. Currently, the currentdensity for evaluation of high-capacity electrodes has reached a newstage where the polarization at the lithium counter electrode has become atechnical barrier for the accurate evaluation of battery electrodes, resultingin severe performance and mechanism mischaracterizations. Here, theaccurate electrochemical behavior for high-capacity electrodes via a singlechannelthree-electrode vehicle is decoupled, by which the impact of lithiumcounter electrode is minimized. The testing high-capacity graphite electrodeis capable of delivering an excellent rate capability with 81.7% capacityretention at 0.3 C, as well as stable cycling performance retaining 97.5%practical reversible capacity after 225 cycles, much higher than the graphiteelectrode tested with traditional half-cell testing vehicle but in close agreementwith the results obtained from a well-matched full cell, reflectingaccurate electrochemical performance evaluations of high-capacity electrodes.Moreover, detailed electrochemical mechanisms of impedance anddiffusion properties for working electrodes are also successfully decoupledindividually. This work uncovers the mismatch between traditional evaluationconfiguration and increasing testing current density and provides aguideline for accurate electrochemical evaluation for ever-increasing highcapacityelectrodes, which is of great significance for high-energy lithium orother alkali-metal ion batteries.

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来源
《Advanced energy materials》 |2023年第11期|2204077.1-2204077.10|共10页
作者
Nan Qin; Liming Jin; Guangguang XingQiang WuJunsheng ZhengCunman ZhangZonghai ChenJim P. Zheng;
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作者单位

Clean Energy Automotive Engineering Center and Schoolof Automotive StudiesTongji University4800 Cao’an Road, Shanghai 201804, China;

High Performance Materials InstituteFlorida State UniversityTallahassee, FL 32310, USA;

Chemical Sciences and Engineering DivisionArgonne National LaboratoryLemont, IL 60439, USADepartment of Electrical EngineeringUniversity at BuffaloThe State University of New YorkBuffalo, NY 14260, USA;

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正文语种英语
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accurate electrochemical behaviors; high-capacity electrodes; lithium-ion batteries; three-electrode configuration;

Decoupling Accurate Electrochemical Behaviors for High-Capacity Electrodes via Reviving Three-Electrode Vehicles

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