Effect of Na+ on Li extraction from brine using LiFePO4/FePO4 electrodes
2014; Elsevier BV; Volume: 146; Linguagem: Inglês
10.1016/j.hydromet.2014.03.010
ISSN1879-1158
AutoresXuheng Liu, Xingyu Chen, Zhongwei Zhao, Xinxing Liang,
Tópico(s)Advanced Battery Materials and Technologies
ResumoLiFePO4/FePO4 electrodes are used to extract Li from brine. The root cause of the negative influences of Na+ on the intercalation/deintercalation of Li+ is found by means of electrochemical analysis. The side-effect of Na+ on the extraction of Li can be eliminated by controlling the electrolytic voltage to less than 0.3 V, and the electrode exhibits excellent cycle performance under this condition. When the electrolytic voltage is 0.25 V, the concentration of Li+ in solution reaches 432 mg · L− 1 after 10 electrolytic cycles, and the average Li+ capacity of the electrode reaches 38.6 mg · g− 1 LiFePO4.
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