| abstract |
The present invention relates to a lithium-containing negative electrode of a secondary battery, and belongs to the field of electrochemistry. According to the present invention, a novel lithium-containing material is adopted as a negative electrode of a lithium secondary battery, and has two phases, wherein the one phase is a rectangular skeleton of a lithium-boron compound Li7B6 or Li5B4, the other phase is a free metal lithium or a lithium alloy, and the free metal lithium or lithium alloy is distributed in the porous Li7B6 or Li5B4 skeleton having stable physical property; and the lithium-boron compound skeleton presents a fiber network structure, the active free metal lithium or lithium alloy exists in the porous structure, the size of the free metal lithium or lithium alloy becomes small, the specific surface area is increased, the stable SEI membrane can be rapidly formed in the electrolyte, the current density on the lithium surface is actually decreased due to the high specific surface area during electrochemical deposition, and the occurrence of the non-uniform deposition is reduced, such that the generation of the lithium dendrite can be reduced or avoided by adopting the lithium-containing as the secondary lithium battery negative electrode. |