Photothermal-enhanced ion transport for efficient electrochemical lithium extraction at low temperatures

Wang，Ziquan1; Chen，Zengye1; Li，Yongliang1; Ren，Xiangzhong1; Xiong，Xunhui2; Lu，Zhouguang3; Deng，Libo1

2024-12-01

10.1016/j.nanoen.2024.110249

Nano Energy   影响因子和分区

2211-2855

The demand for lithium (Li) resources is booming due to the widespread applications of Li-ion batteries recently. Electrochemically extracting lithium from brines is a promising approach to address the shortage of Li resources. However, when working at low temperatures, which are inevitable in frigid salt lakes, the performance is severely deteriorated due to depressed transport kinetics. Herein, we addressed this issue by constructing a new electrochemical lithium extraction system using polypyrrole-coated FePO as the electrode material, which exhibits superior performance at low temperatures due to photothermal effect of polypyrrole. At an ambient temperature of 5 °C and irradiated with sunlight, this system achieved a lithium intercalation capacity of 5.84 mmol g (2.72 times higher than that without solar irradiation) at an extraction rate of 5.92 mmol g h from a 15 mM LiCl solution, and a selectivity of 124 towards Li over Mg. After 5000 cycles of continuous operation, the system still retained 81 % of its initial capacity at a current density of 50 A m. The proposed photothermal-enhanced electrochemical lithium extraction system has great application potential for lithium extraction from brine at low-temperature regions.

Electrochemical lithium extraction FePO4 Photothermal effect Temperature effect

英语

其他

2-s2.0-85203644709

Scopus

1.College of Chemistry and Environmental Engineering,Shenzhen University,Shenzhen,518060,China
2.School of Environment and Energy,Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials,South China University of Technology,Guangzhou,510640,China
3.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Wang，Ziquan,Chen，Zengye,Li，Yongliang,et al. Photothermal-enhanced ion transport for efficient electrochemical lithium extraction at low temperatures[J]. Nano Energy,2024,131.

Wang，Ziquan.,Chen，Zengye.,Li，Yongliang.,Ren，Xiangzhong.,Xiong，Xunhui.,...&Deng，Libo.(2024).Photothermal-enhanced ion transport for efficient electrochemical lithium extraction at low temperatures.Nano Energy,131.

Wang，Ziquan,et al."Photothermal-enhanced ion transport for efficient electrochemical lithium extraction at low temperatures".Nano Energy 131(2024).