The invention discloses a three-dimensional self-supported 
lithium-loving carrier-packaged 
metal lithium composite negative 
electrode and a preparation method thereof. The three-dimensional self-supported 
lithium-loving carrier-packaged 
metal lithium composite negative 
electrode comprises the following steps of 1) carbonizing 
melamine foam in an 
inertia atmosphere to obtain a 
nitrogen-rich lithium-loving three-dimensional self-supported carrier; and 2) packaging 
metal lithium in holes of the three-dimensional self-supported carrier to obtain the metal lithium composite negative 
electrode. Carbon 
sponge obtained by 
carbonization of 
melamine foam is used as a metal lithium carrier, and the metal lithium composite negative electrode has effects of guiding metal lithium to be uniformly deposited and preventing 
dendrite from being generated. 
Lithium-loving functional groups are uniformly arranged on the carrier, a lithium-loving 
coating layer is deposited on a hole surface of the carrier, the lithium-loving performance of the carrier is improved, the 
volume change of the metal 
lithium electrode during the circulation process is effectively buffered, moreover, the lithium-loving functional groups uniformly arranged on the three-dimensional carrier are used as active sites for metal lithium deposition, the 
nucleation over-potential is reduced, uniform 
nucleation of metal lithium can be effectively controlled, so that the 
dendrite generation is prevented.