부산대학교 도서관

The manganese-based spinel adsorbent (HMO) refers to lithium-ion adsorbents derived from the spinellithium manganese oxide (LMO). Two types of lithium ions extraction composite films composed of HMO(HMn2O4 and H1.6Mn1.6O4) are successfully prepared by the blade coating method. Based on the excellentLi+ selectivity of HMO and the outstanding conductivity of conductive carbon black (C), HMO/C films arecarried out to extract lithium by electrochemically switched ion exchange (ESIX) technique. HMO has acertain adsorption capacity for Li+ when the Li+ concentration is close to the actual brine, and the adsorptioncapacity of HMn2O4 and H1.6Mn1.6O4 is 24.56 mg/g and 34.40 mg/g, respectively. HMO showed goodselectivity for Li+ in multiple metal ions solution. The capacity of HMn2O4 and H1.6Mn1.6O4 keep 80% and86% of the initial values after 5 cycles, respectively. The inherent different lithium occupied leads to thedifference of electrical-adsorption abilities between HMn2O4 and H1.6Mn1.6O4. H1.6Mn1.6O4 has a broadapplication prospect in lithium extraction from salt lake brine due to its lower application voltage, largeadsorption capacity and superior stability.