CAJ | 학술논문

测定 AlCl3-BMIC 离子液体(摩尔比2:1)电导率与 Na+含量的关系,采用循环伏安法研究不同 Na+含量离子液体的电化学性能,并通过恒电流电沉积考察 Na+含量对槽电压、电流效率、沉积层形貌及电沉积铝纯度的影响.结果表明:随着 Na+含量增加,离子液体的电导率和铝电还原峰值电流密度降低,交换电流密度增加,传递系数基本保持不变;而且铝沉积的电流效率降低、能耗增加.此外,当离子液体中 Na+含量低于0.2 g/L 时,对铝沉积层形貌影响不大,当 Na+含量增加到0.5 g/L 时,沉积层变得平整致密,颗粒减小,但进一步增加 Na+含量,颗粒又逐渐长大.离子液体中 Na+的存在对铝沉积层的纯度影响很小,即使 Na+含量高达2.0 g/L,铝沉积层中 Na含量也非常低.
측정 AlCl3-BMIC 리자액체(마이비2:1)전도솔여 Na+함량적관계,채용순배복안법연구불동 Na+함량리자액체적전화학성능,병통과항전류전침적고찰 Na+함량대조전압、전류효솔、침적층형모급전침적려순도적영향.결과표명:수착 Na+함량증가,리자액체적전도솔화려전환원봉치전류밀도강저,교환전류밀도증가,전체계수기본보지불변;이차려침적적전류효솔강저、능모증가.차외,당리자액체중 Na+함량저우0.2 g/L 시,대려침적층형모영향불대,당 Na+함량증가도0.5 g/L 시,침적층변득평정치밀,과립감소,단진일보증가 Na+함량,과립우축점장대.리자액체중 Na+적존재대려침적층적순도영향흔소,즉사 Na+함량고체2.0 g/L,려침적층중 Na함량야비상저.
The electrical conductivities of AlCl3-BMIC (mole ratio of AlCl3 to BMIC being 2:1) ionic liquids were measured as a function of the Na+ content. The effect of Na+ content on electrochemical characteristics of ionic liquid was investigated by the cyclic voltammetry. Constant current deposition experiments were used to study the effect of Na+content on the cell voltage, current efficiency, surface morphology and purity of aluminum electrodeposits. The results show that the electrical conductivities of ionic liquid and the cathodic peak current density decrease, the exchange current density increases, and the transfer coefficient basically remains unchanged with the increase of Na+ content in the ionic liquid. Constant current deposition experiments show that the current efficiency decreases and the energy consumption increases with the increase of Na+ content. The presence of Na+ only has minimal effect on the surface morphology of the aluminum deposits when Na+ content is below 0.2 g/L. Aluminum deposits become more compact, and the grain size decreases as the Na+ content increases up to 0.5 g/L, but further increasing Na+ content, aluminum deposits are still compact, but the grain size increases. The purity of aluminum deposits is not virtually affected by Na+ content in ionic liquid electrolytes. The Na content of the aluminum deposits is very low even though the Na+ content is up to 2 g/L.