Электронный каталог

Статья

Ivanets, A.
Effect of Al*3*+/Mn*3*+ Isovalent Substitution on Physico-Chemical Properties of Li*+ Adsorbents Based on Li&sub(1.33)Al&sub(x)Mn&sub(1.67-x)O&sub(4)(х = 0.1-0.9) / A.Ivanets, V.A.Altynov, I.I.Vinogradov, [a.o.]. – Text : electronic // Ceramics International. – 2026. – Vol. 52, No. 22. – P. 39752-39761. – URL: https://doi.org/10.1016/j.ceramint.2026.06.423. – Bibliogr.: 30.

Lithium-ion sieves based on Li–Mn spinels suffer from limited structural stability due to the Jahn–Teller effect. With a view to mitigating this drawback, this study adopted isovalent substitution of Mn&sup(3+) with Al&sup(3+) ions in the crystal lattice of Li&sub(1.33)Mn&sub(1.67)O&sub(4). This substitution enhances stability during adsorption/desorption reactions by forming stronger Al-O bonds than Mn-O bonds in the spinel framework. Our research revealed that Li&sub(1.33)Al&sub(0.9)Mn&sub(0.77)О&sub(4) exhibited negligible manganese leaching (0.8 wt%), significantly lower than the unsubstituted Li&sub(1.33)Mn&sub(1.67)O&sub(4) sample. Furthermore, Li&sub(1.33)Al&sub(0.3)Mn&sub(1.37)О&sub(4) exhibited manganese leaching of 2.3 wt% and an adsorption capacity of 9.3 mmol/g, compared with higher leaching and lower capacity for the unsubstituted Li&sub(1.33)Mn&sub(1.67)O&sub(4). To further optimize the material for application, alginate beads with Li&sub(1.33)Al&sub(0.3)Mn&sub(1.37)О&sub(4) were synthesized, with a sorption capacity of 4.1 mmol/g. The findings indicate the potential for Al&sup(3+) substitution as an approach to both structural stability and improvement in adsorption performance in lithium-ion sieves, paving the way for their broader application in lithium recovery procedures from aqueous solutions such as salt lakes or seawater.



Спец.(статьи,препринты) = С 45 а - Термодинамические величины элементов и соединений
Спец.(статьи,препринты) = С 44 б - Разделение химических элементов экстракционными и ионообменными методами
ОИЯИ = ОИЯИ (JINR)2026