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- W2393539063 abstract "A spinel lithium manganese oxide doped with nickel (LiNi0.05Mn1.95O4) was prepared by a sol-gel method using acetic lithium, nickel and manganese as raw materials. The lithium ion-sieve (denoted as LiNiMn-H) was obtained by acidification of the obtained LiNi0.05Mn1.95O4 with 0.5 mol·L-1 (NH4)2S2O8. After testing, we found that the dissolution ratio of Mn2+ from LiNi0.05Mn1.95O4 during the acid-modification process was only 0.31% (w, mass fraction) and the saturation ion-exchange capacity of LiNiMn-H for Li+ was 5.29 mmol (36.72 mg) Li+/g ion-sieve. The exchange isothermal curves of LiNiMn-H in the H+-Li+ system were measured at 15, 25, 35 and 45 ℃ and the average activity coefficients of the electrolyte were calculated using Pitzer electrolyte solution theory. Other thermodynamic constants, such as the equilibrium constants Ka, △Gm, △Hm, and △Sm, were calculated during the exchange process. We conclude that the equilibrium constants reduce with the increase in temperature and that the selectivity of LiNiMn-H for Li+ is higher than the original ion H+. The exchange process is exothermic and the adsorption process occurs spontaneously (△Gm0)." @default.
- W2393539063 created "2016-06-24" @default.
- W2393539063 creator A5051005272 @default.
- W2393539063 date "2009-01-01" @default.
- W2393539063 modified "2023-09-25" @default.
- W2393539063 title "Synthesis of LiNi_(0.05)Mn_(1.95)O_4 and Its Ion-Exchange Thermodynamics for Li~+" @default.
- W2393539063 hasPublicationYear "2009" @default.
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