石墨负极孔径对锂离子电池性能的影响

恩 周

doi:10.12345/dlynyqy.v4i10.43832

研究文章

石墨负极孔径对锂离子电池性能的影响

恩周

4 卷, 10 期 (2026) 页码 75-79 开放存取

摘要

针对石墨负极嵌入/脱出动力学受限问题，本研究采用水蒸气–石墨高温气相刻蚀策略，调控温度构建不同孔径分布的刻蚀石墨负极，结合SEM、拉曼、孔径分布及电化学测试解析结构–性能关系。800 °C、20 mL·min-¹下制备的ZNG-800-20倍率与循环性能最优：扣式电池1C容量较对照提升88.6%，软包电池DCR及−20 °C可逆容量显著改善，长循环未因缺陷而恶化。适度深度孔洞增多了嵌入边缘位点与去溶剂化位点，降低传质与电荷转移阻力；适中缺陷密度抑制过量界面副反应，实现动力学增强与界面稳定的协同。

关键词

人造石墨；锂离子电池；快充性能；孔径分布；负极材料

参考

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