Adsorbent for extracting lithium from whisker-shaped spinel type magnesium-aluminum oxide lithium ion sieve salt lake and preparation method of adsorbent for extracting lithium from whisker-shaped spinel type magnesium-aluminum oxide lithium ion sieve salt lake

The invention discloses an adsorbent for extracting lithium from a whisker-shaped spinel type magnesium-aluminum oxide lithium ion sieve salt lake and a preparation method of the adsorbent, and belongs to the technical field of materials, the Li < + > saturation adsorption capacity of the adsorbent for extracting lithium from the whisker-shaped spinel type magnesium-aluminum oxide lithium ion sieve salt lake is greater than 50mg/g, and the saturation adsorption capacity is greater than 45mg/g after the adsorbent is recycled for 30 times; the diameter of the adsorbent is 0.5-1 [mu] m, and the adsorbent is in a whisker shape. The adsorbent provided by the invention is more compact in structure, and can effectively avoid the change of the structure of magnesium aluminate spinel caused by the fact that lithium ions thermally migrate into lattice gaps of the magnesium aluminate spinel, thereby further improving the cycling stability of a spinel type magnesium aluminum oxide lithium ion sieve. 本发明公开了一种晶须状尖晶石型镁铝氧化物锂