Technical Information Magazine 202101-02 Evaluation of Electrochemical Properties and Disassembly Analysis

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last updated：Mar 24, 2025

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The technical information magazine The TRC News provides the latest information on analytical techniques that are useful for research and development, solving production troubles, and quality control.

**Abstract** From non-destructive electrochemical characterization using full cells of lithium-ion batteries (LIB), we inferred degradation factors. Furthermore, we dismantled the batteries to conduct chemical analysis, undertaking qualitative and quantitative analysis of the electrode degradation state. We proposed a degradation analysis method for graphite/SiO composite anodes at our hosted "5th Battery Users Meeting" (June 2019). This paper introduces a case study evaluating the changes in battery characteristics observed after cycle degradation tests using prototype cells with graphite/SiO composite anodes, which are expected to be high-capacity next-generation materials. **Table of Contents** 1. Introduction 2. Electrochemical characterization of prototype cells 3. Analysis of factors causing capacity imbalance between positive and negative electrodes 4. Degradation analysis of negative electrode active material (Region 2) 5. Conclusion

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Technical Information Magazine The TRC News "Clarification of the Causes of Cycle Degradation of Graphite/SiO Composite Anodes in Lithium-Ion Batteries through Electrochemical Property Evaluation and Disassembly Analysis" 【Abstract】 By inferring degradation factors from non-destructive electrochemical property evaluations using full cells of lithium-ion batteries (LIB), and further conducting chemical analysis after disassembling the batteries, we undertook qualitative and quantitative analyses of the electrode degradation state. We proposed a degradation analysis method for graphite/SiO composite anodes at our hosted "5th Battery Users Meeting" (June 2019). This paper introduces evaluation cases of battery characteristic changes observed after cycle degradation tests using graphite/SiO composite anodes, which are expected to be high-capacity next-generation materials. 【Table of Contents】 1. Introduction 2. Electrochemical Property Evaluation of Prototype Cells 3. Analysis of Factors Causing Capacity Imbalance between Positive and Negative Electrodes 4. Degradation Analysis of Negative Electrode Active Material (Region 2) 5. Conclusion 【Figures and Tables】 Table 1: Configuration of Prototype Laminated Cells Table 2: Electrochemical Test Conditions Figures 1 to 15: Charge and discharge characteristics of cells, positive and negative electrodes; Cross-sectional SEM images of discharged negative electrodes, elemental distribution via SEM-EDX maps of SiO particles, ion distribution of active material particles.