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Simplifying and Optimizing Li4SiO4 Preparation from Spent LiFePO4 Batteries with Enhanced CO2 Adsorption
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2023-09-10 , DOI: 10.1021/acssuschemeng.3c03695
Jiaqi Ruan 1 , Yichao Tong 1 , Jingyu Ran 1 , Changlei Qin 1
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2023-09-10 , DOI: 10.1021/acssuschemeng.3c03695
Jiaqi Ruan 1 , Yichao Tong 1 , Jingyu Ran 1 , Changlei Qin 1
Affiliation
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A large amount of spent lithium batteries, especially lithium iron phosphate (LiFePO4), is discarded due to their limited lifespan and poses a great threat to the environment. At the same time, the potential application of Li4SiO4, an efficient high-temperature CO2 sorbent, is largely limited by the high cost of lithium resources. Thus, the preparation of Li4SiO4 from spent LiFePO4 batteries has great potential for achieving waste recycling and reducing CO2 capture costs. However, the process of recycling spent LiFePO4 batteries to synthesize Li4SiO4 sorbents still needs to be well investigated. This work proposes to simplify the preparation scheme by combing precipitation, Na doping, and synthesis processes and further optimizing the key variables of pH, Na2CO3 ratio, and heating rate. An optimal condition is determined to be pH = 9, Na2CO3 ratio = 11 wt %, and heating rate = 5 °C/min, and the sorbent prepared shows a superior stable CO2 capacity of 0.24 g/g in 80 adsorption/desorption cycles. The work develops an effective Li4SiO4 preparation scheme from spent LiFePO4 batteries with largely enhanced CO2 adsorption performance and reduced cost and could achieve a win–win situation in waste recycling and CO2 mitigation.
中文翻译：
利用增强的 CO2 吸附简化和优化废 LiFePO4 电池的 Li4SiO4 制备
大量废旧锂电池，尤其是磷酸铁锂(LiFePO 4 )由于寿命有限而被丢弃，对环境造成极大威胁。同时，Li 4 SiO 4这种高效的高温CO 2吸附剂的潜在应用在很大程度上受到锂资源成本高的限制。因此，从废旧LiFePO 4电池制备Li 4 SiO 4在实现废物回收和降低CO 2捕获成本方面具有巨大潜力。然而，回收废旧LiFePO 4电池合成Li 4 SiO 4的过程吸附剂仍需深入研究。本工作提出通过结合沉淀、Na掺杂和合成工艺并进一步优化pH、Na 2 CO 3比例和加热速率的关键变量来简化制备方案。确定最佳条件为pH=9、Na 2 CO 3比例=11 wt%、升温速率=5℃/min，所制备的吸附剂在80次吸附中表现出优异的稳定CO 2容量为0.24 g/g。 /解吸循环。该工作开发了一种有效的Li 4 SiO 4制备方案，由废LiFePO 4电池制成，并大幅增强了CO 2吸附性能和降低成本，可以实现废物回收和CO 2减排的双赢。
更新日期：2023-09-10
中文翻译：
利用增强的 CO2 吸附简化和优化废 LiFePO4 电池的 Li4SiO4 制备
大量废旧锂电池，尤其是磷酸铁锂(LiFePO 4 )由于寿命有限而被丢弃，对环境造成极大威胁。同时，Li 4 SiO 4这种高效的高温CO 2吸附剂的潜在应用在很大程度上受到锂资源成本高的限制。因此，从废旧LiFePO 4电池制备Li 4 SiO 4在实现废物回收和降低CO 2捕获成本方面具有巨大潜力。然而，回收废旧LiFePO 4电池合成Li 4 SiO 4的过程吸附剂仍需深入研究。本工作提出通过结合沉淀、Na掺杂和合成工艺并进一步优化pH、Na 2 CO 3比例和加热速率的关键变量来简化制备方案。确定最佳条件为pH=9、Na 2 CO 3比例=11 wt%、升温速率=5℃/min，所制备的吸附剂在80次吸附中表现出优异的稳定CO 2容量为0.24 g/g。 /解吸循环。该工作开发了一种有效的Li 4 SiO 4制备方案，由废LiFePO 4电池制成，并大幅增强了CO 2吸附性能和降低成本，可以实现废物回收和CO 2减排的双赢。
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