NaA型分子筛在废锂电池模拟浸出液中的钴锂金属离子分离和再生应用性能

doi:10.11896/cldb.24090136

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Abstract The utilization of NaA zeolite as an adsorbent for the selective separation and regeneration of Co²⁺ and Li⁺ from a simulated leaching solution of spent lithium-ion batteries has been explored. The selective adsorption behavior and mechanism of the NaA zeolite towards Co²⁺ were investigated. The morphology and structure of the NaA zeolite before and after adsorption were characterized using SEM-EDS, FTIR and XRD techniques. Experimental results indicated that the optimal dosage of NaA zeolite increased with the increase in the initial molar concentration of Co²⁺ and Li⁺ in the mixed solution. Under the condition of an initial molar concentration of 0.05 mol/L for both Co²⁺ and Li⁺, a NaA zeolite dosage of 35 g/L, an initial solution pH of 5, an adsorption temperature of 60 ℃, and the adsorption time was 30 min, the adsorption efficiencies of Co²⁺ and Li⁺ were 95.8% and 2.5%, respectively. This underscores the remarkable ability of NaA zeolite to selectively capture Co²⁺ from the simulated leaching solution, thereby facilitating the effective separation of Co²⁺ and Li⁺. The adsorption behavior of Co²⁺ onto NaA zeolite was found to adhere to the Langmuir isotherm model and pseudo-second-order kinetics, with a maximum adsorption capacity of 108.7 mg/g. The mechanism underlying this process was primarily ion exchange, where Co²⁺ was adsorbed and bound to the surface of the zeolite without altering its morphology or structure. Notably, the separated Li⁺ from the simulated leaching solution and the desorbed Co²⁺ could be successfully regenerated into Li₂CO₃ with a purity of 97.5% and CoCO₃ with a purity of 99.2%, yielding production rates of 95.2% and 96.1%, respectively. This study provides new insights into separation, recovery and reuse of metal ions from spent lithium-ion batteries using NaA zeolite.

Key words： spent lithium-ion battery NaA zeolite cobalt and lithium separation recycling regeneration

Published: 25 November 2025 Online: 2025-11-14

CLC number:

X758

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	LIU Xiangyu
	CHENG Qian
	WANG Yue
	WANG Yongxiang

Cite this article:

LIU Xiangyu,CHENG Qian,WANG Yue, et al. The Application Performance of NaA Zeolite for the Separation and Regeneration of Co²⁺ and Li⁺ from the Simulated Leaching Solution of Spent Lithium-ion Batteries[J]. Materials Reports, 2025, 39(22): 24090136-7.

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https://www.mater-rep.com/EN/10.11896/cldb.24090136 OR https://www.mater-rep.com/EN/Y2025/V39/I22/24090136

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