LITHIUM-ION BATTERY, BATTERY MODULE, BATTERY PACK, AND POWER CONSUMPTION APPARATUS
A lithium-ion battery includes a negative electrode including a current collector, a lithiophilic layer, a main body layer, and a lithiophobic layer laminated in sequence. A ratio of a discharge negative electrode capacity to a discharge positive electrode capacity of the lithium-ion battery is less than 1.
1 . A lithium-ion battery, comprising:
a negative electrode, comprising a current collector, a lithiophilic layer, a main body layer, and a lithiophobic layer laminated in sequence;
wherein a ratio of a discharge negative electrode capacity to a discharge positive electrode capacity of the lithium-ion battery is less than 1.
2 . The lithium-ion battery according to claim 1 , wherein:
a material of the lithiophilic layer comprises a doped and modified carbon material;
the carbon material is at least one of artificial graphite, natural graphite, carbon nanotubes, carbon fibers, meso-carbon microbeads, graphene, and graphene oxide;
a doping element in the doped and modified carbon material is at least one of O, N, S, B, P, F, Cl, Br, and I; and
an amount of the doping element is 0.2-2 wt. %, calculated based on a weight of the doped and modified carbon material.
3 . The lithium-ion battery according to claim 1 , wherein a material of the main body layer comprises at least one of natural graphite, artificial graphite, meso-carbon microbeads, soft carbon, or hard carbon.
4 . The lithium-ion battery according to claim 1 , wherein a material of the lithiophobic layer comprises a carbon material without functional groups or defects, and the carbon material is at least one of artificial graphite, natural graphite, carbon nanotubes, carbon fibers, meso-carbon microbeads, and graphene.
5 . The lithium-ion battery according to claim 1 , wherein a thickness of the lithiophilic layer is in a range of 0.2-15 μm.
6 . The lithium-ion battery according to claim 1 , wherein a thickness of the main body layer is in a range of 80-200 μm.
7 . The lithium-ion battery according to claim 1 , wherein a thickness of the lithiophobic layer is in a range of 0.2-15 μm.
8 . A battery module, comprising the lithium-ion battery according to claim 1 .
9 . A battery pack, comprising the battery module according to claim 8 .
10 . A power consumption apparatus, comprising the lithium-ion battery according to claim 1 .