Song Shaole, Liu Runqing, Li Jiexiang, Sun Wei, Yang Yue
School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China.
Engineering Research Center of Ministry of Education for Carbon Emission Reduction in Metal Resource Exploitation and Utilization, Changsha, 410083, China.
ChemSusChem. 2025 Feb 1;18(3):e202401432. doi: 10.1002/cssc.202401432. Epub 2024 Oct 30.
Owing to the rapid increase of lithium iron phosphate (LiFePO) batteries, recycling and regeneration of LiFePO enjoys significances for sustainable development and environmental protection. In this study, an effective regeneration method for spent LiFePO materials and the influence of Al impurity on the electrochemical performance of regenerated LiFePO were studied. Firstly, 99.26 % Fe, 99.52 % P, 99.58 % Li, 59.36 % Al and 20.24 % Cu in spent LiFePO material were leached with 150 g ⋅ L HSO. Subsequently, Al removal and control were achieved by simply adjusting the pH value, and FePO ⋅ 2HO precursors with different Al contents were prepared. Specially, the LiFePO regenerated by FePO ⋅ 2HO precursor containing 0.096 % Al exhibits excellent electrochemical performance with discharge capacity of 145 mAh ⋅ g, 140.5 mAh ⋅ g and 130.9 mAh ⋅ g at the current density of 1 C, 2 C and 5 C, respectively.
由于磷酸铁锂（LiFePO）电池的快速增长，磷酸铁锂的回收和再生对于可持续发展和环境保护具有重要意义。在本研究中，研究了一种有效的废旧磷酸铁锂材料再生方法以及铝杂质对再生磷酸铁锂电化学性能的影响。首先，用150 g·L的HSO浸出废旧磷酸铁锂材料中的99.26%铁、99.52%磷、99.58%锂、59.36%铝和20.24%铜。随后，通过简单调节pH值实现铝的去除和控制，并制备了不同铝含量的FePO·2HO前驱体。特别地，由含0.096%铝的FePO·2HO前驱体再生的磷酸铁锂在1 C、2 C和5 C的电流密度下分别表现出优异的电化学性能，放电容量分别为145 mAh·g、140.5 mAh·g和130.9 mAh·g。
