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.