Aging in First and Second Life of G/LFP 18650 Cells: Diagnosis and Evolution of the State of Health of the Cell and the Negative Electrode under Cycling

IF 4.6 4区化学 Q2 ELECTROCHEMISTRY

Batteries Pub Date : 2024-04-18 DOI:10.3390/batteries10040137

William Wheeler, Pascal Venet, Yann Bultel, A. Sari, Elie Riviere

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引用次数: 0

Abstract

Second-life applications for lithium-ion batteries offer the industry opportunities to defer recycling costs, enhance economic value, and reduce environmental impacts. An accurate prognosis of the remaining useful life (RUL) is essential for ensuring effective second-life operation. Diagnosis is a necessary step for the establishment of a reliable prognosis, based on the aging modes involved in a cell. This paper introduces a method for characterizing specific aging phenomenon in Graphite/Lithium Iron Phosphate (G/LFP) cells. This method aims to identify aging related to the loss of active material at the negative electrode (LAMNE). The identification and tracking of the state of health (SoH) are based on Incremental Capacity Analysis (ICA) and Differential Voltage Analysis (DVA) peak-tracking techniques. The remaining capacity of the electrode is thus evaluated based on these diagnostic results, using a model derived from half-cell electrode characterization. The method is used on a G/LFP cell in the format 18650, with a nominal capacity of 1.1 Ah, aged from its pristine state to 40% of state of health.

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G/LFP 18650 电池第一次和第二次寿命中的老化：电池和负极在循环过程中的健康状况诊断与演变

锂离子电池的二次寿命应用为业界提供了推迟回收成本、提高经济价值和减少环境影响的机会。准确预测剩余使用寿命（RUL）对于确保有效的二次寿命运行至关重要。根据电池的老化模式进行诊断是建立可靠预报的必要步骤。本文介绍了一种表征石墨/磷酸铁锂（G/LFP）电池特定老化现象的方法。该方法旨在识别与负极（LAMNE）活性材料损失有关的老化。健康状态 (SoH) 的识别和跟踪基于增量容量分析 (ICA) 和差分电压分析 (DVA) 峰值跟踪技术。根据这些诊断结果，利用半电池电极特性分析得出的模型，对电极的剩余容量进行评估。该方法用于标称容量为 1.1 Ah 的 18650 型 G/LFP 电池，该电池已从原始状态老化至 40% 的健康状态。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Batteries Energy-Energy Engineering and Power Technology

CiteScore

4.00

自引率

15.00%

发文量

217

审稿时长

7 weeks