Journal of Sustainable Metallurgy
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2024
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IF 2.5
Yang Yi,Ouyang Lun-ao,He Yapeng,He Puqiang,Tu Jian,Huang Hui,Guo Zhongcheng
The hydrometallurgical recycling of spent lead-acid battery has received extensive attention benefitting from its features of cleanability and process controllability, but the process still suffers from significant challenges of huge chemical consumption and low economic efficiency. Here, a sustainable green approach that enables closed-loop recovery of leaching reagent NH 4 Ac to obtain high-purity PbO powder from discarded lead paste is proposed. The process includes dissolution, chemical transformation, carbonization, and calcination stages. Under the optimal leaching condition of NH 4 Ac concentration 4.5 mol L –1 , H 2 O 2 /PbO 2 molar ratio 1.5, reaction temperature 40 °C, and time 60 min, the leaching ratio of lead reaches as high as 99.35%. The exceptionally high concentration of NH 4 Ac to dissolve PbSO 4 phases than theoretical ratio could be attributed to the distribution state of Pb substances. With (NH 4 ) 2 CO 3 as carbonizing agent, above 99.9% of lead could be precipitated as PbCO 3 products when the molar ratio CO 3 2– /Pb is 1.2. High-purity β-PbO powder is subsequently achieved from the thermal decomposition of PbCO 3 precursor, where the effect of calcination temperature and atmosphere on the chemical compositions are examined. Economic analysis reveals the economic feasibility and profits of the recycling approach. The process produces high-purity PbCO 3 and PbO products enabling leaching reagents NH 4 Ac reuse, providing a practicable solution for sustainable recovery of lead from waste lead paste. Graphical
研究领域:
环境科学
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冶金工程
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高影响因子
ACS Applied Energy Materials
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2024
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IF 5.4
Boyuan Yang,Wangshu Xu,Shu Tang,Wanfei Shi,Jingjing Dong,Hao Liu,Jie Xing,Huiying Hao
Stability is a crucial factor in the commercialization of perovskite solar cells (PSCs). CsPbBr3 PSCs, despite being less efficient than organic–inorganic hybrid PSCs, have a significant advantage in terms of stability. This makes them have promising potential for commercialization. In this study, high-quality all-inorganic CsPbBr3 perovskite films were prepared by using a multistep method in ambient air conditions. The crystalline quality of the CsPbBr3 films was improved by adding an appropriate amount of ammonium acetate (NH4Ac) to the PbBr2 precursor solution. Finally, carbon-based hole transport layer-free CsPbBr3 PSCs were fabricated by selecting NH4Ac-optimized light-absorbing layers and carbon electrodes that have a good commercialization prospect. Compared with control devices, the NH4Ac-optimized CsPbBr3 cell devices significantly improved in both efficiency and stability. The photoelectric conversion efficiency increased from 7.80% to 9.68%. This study provides an effective strategy for the preparation of high-quality films by using a multistep method and is also of great significance in promoting the commercialization of PSCs.
研究领域:
材料科学
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太阳能技术
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DOI
高影响因子
APPLIED SURFACE SCIENCE
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2022
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IF 7.392
Tingting Zhong,Kunpeng Tang,Wangshu Xu,Lei Shi,Jingjing Dong,Hao Liu,Jie Xing,Huiying Hao
Carbon-based all-inorganic perovskite solar cells (PSCs) have attracted tremendous attention due to the higher intrinsic stability, which is beneficial to lower fabrication costs and further commercial applications. Furthermore, for the purpose of promoting the industrialization of PSCs, it is crucial to explore preparation methods in ambient air condition. Herein, ammonium acetate (NH 4 Ac) is added into the antisolvent for the first time in carbon-based all-inorganic PSCs under the full ambient air condition. It could improve the quality of perovskite films by adjusting the nucleation density and utilizing intermediate phase to retard crystallization. By regulating the concentrations of NH 4 Ac, the perovskite films with dense and pinhole-free, large grain size, few grain boundaries and less defects are finally formed. Ultimately, the optimal device achieved a high efficiency of 15.43%, which is a new record value for carbon-based all-inorganic PSCs.
研究领域:
材料科学
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能源技术
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DOI
高影响因子
CRYSTENGCOMM
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2026
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IF 2.4
Pengfei Ouyang,Weiwei Li,Dingshan Zheng,Nian Cheng,Han Pan
All-inorganic CsPbBr3 perovskite solar cells exhibit excellent humidity and thermal stability compared with organic-inorganic hybrid perovskite solar cells. However, the proposed two-step spin-coating method for fabricating CsPbBr3 film using highly concentrated CsBr/H2O solution in the second step is prone to result in CsPbBr3 film with high defect density, which greatly limits the performance of CsPbBr3 perovskite solar cells. In this study, appropriate amount of NH4Ac is used as additive in the CsBr/H2O solution. The interaction of NH4Ac with CsPbBr3 could contribute to smooth and densified CsPbBr3 perovskite films with suppressed defect density. When carbon electrode based CsPbBr3 perovskite solar cells are fabricated, an optimized photovoltaic conversion efficiency of 8.77% is achieved using 0.50 mg mL-1 NH4Ac in CsBr/H2O solution, which is 23.35% higher than that of the reference perovskite solar cell (champion PCE = 7.11%). Furthermore, the optimized CsPbBr3 perovskite solar cell exhibits better long-term stability, which can maintain more than 85% of its initial efficiency after being placed for 30 days at an ambient temperature of 25 °C and a relative humidity of 30%~40%.
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高影响因子
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