In this work, a zinc (Zn) aminocaproate complex was extracted from expired aminocaproic acid injection by way of one-step facile chemical liquid-phase deposition for the first time, and the morphology, microstructure and electrochemical lithium (Li)-storage performances were also investigated. The results showed that the obtained zinc aminocaproate complex displayed a uniform mint-leaf-like flower morphology with a particle size of 300–500 nm. The reversible discharge specific capacities were 379.1 mAh/g at 100 mA/g and 100.6 mAh/g at 2000 mA/g, indicating high electrochemical lithium-storage performances. Conversion reaction and alloying/dealloying were confirmed to take part in the electrochemical lithium-storage mechanism. Seemingly, orderly hierarchical mint-leaf-like morphology may play an important role in improving the electrochemical lithium-storage capacity of the zinc aminocaproate complex anode. The satisfactory results may open a new path to develop the circular economy of expired waste aminocaproic acid injection which is very important for the environmental protection and sustainable development.

中文翻译：

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薄荷叶状氨基己酸锌的过期氨基己酸注射液回收利用

本工作首次采用一步简便的化学液相沉积法从呼出的氨基己酸注射液中提取氨基己酸锌（Zn）络合物，并对其形貌、微观结构和电化学储锂（Li）性能进行了研究。也进行了调查。结果表明，所得氨基己酸锌配合物呈现出均匀的薄荷叶状花形态，粒径为300-500 nm。可逆放电比容量在 100 mA/g 时为 379.1 mAh/g，在 2000 mA/g 时为 100.6 mAh/g，表明具有较高的电化学储锂性能。证实转化反应和合金化/脱合金参与了电化学储锂机制。似乎，有序的分级薄荷叶状形态可能在提高氨基己酸锌复合负极的电化学储锂容量方面发挥重要作用。令人满意的结果可能为发展过期废氨基己酸注射液循环经济开辟了一条新途径，这对环境保护和可持续发展具有重要意义。