ANODE PLATE OF LITHIUM-ION BATTERY AND APPLICATION THEREOF
The present disclosure provides an anode plate of a lithium-ion battery and application thereof. The anode plate comprises a current collector, an anode active material layer, and a specially designed lithium-precipitation inhibiting layer. The anode plate of the present disclosure can effectively avoid the lithium precipitation on a surface of the anode plate in an economical and simple way, and meanwhile effectively reduce a capacity ratio of an anode to a cathode, and improve the initial coulombic efficiency, cycle life, energy density, and safety of the lithium-ion battery.
1 . An anode plate for a lithium-ion battery, wherein the anode plate comprises:
i) a current collector;
ii) an anode active material layer located on at least one surface of the current collector; and
iii) a lithium-precipitation inhibiting layer located on the anode active material layer, wherein the lithium-precipitation inhibiting layer contains at least one of following lithium-precipitation inhibiting materials: LiNi x Co y Mn z Fe w O 2 , LiMPO 4 , and Li 4 Ti 5 O 12 , where 0≤x≤1, 0≤y≤1, 0≤z≤1, 0≤w≤1, and x+y+z+w=1, and M is selected from Fe, Co, Ni, Mn or a combination thereof.
2 . The anode plate according to claim 1 , wherein the lithium-precipitation inhibiting layer contains at least one of the following lithium-precipitation inhibiting materials: LiNi 0.85 Co 0.075 Mn 0.075 O 2 , LiNi 0.8 Co 0.1 Mn 0.1 O 2 , LiNi 0.7 Co 0.15 Mn 0.15 O 2 , LiNi 0.6 Co 0.2 Mn 0.2 O 2 , LiNi 0.5 Co 0.2 Mn 0.3 O 2 , LiNi 1/3 Co 1/3 Mn 1/3 O 2 , LiCoO 2 , LiNiO 2 , LiMnO 2 , LiFeO 2 , LiFePO 4 , LiCoPO 4 , LiNiPO 4 , LiMnPO 4 , and Li 4 Ti 5 O 12 .
3 . The anode plate according to claim 1 , wherein the lithium-precipitation inhibiting layer contains no conductive material.
4 . The anode plate according to claim 3 , wherein the lithium-precipitation inhibiting layer contains no carbon-based conductive material.
5 . The anode plate according to claim 1 , wherein the lithium-precipitation inhibiting layer comprises lithium-precipitation inhibiting material and one or more binders.
6 . The anode plate according to claim 1 , wherein the lithium-precipitation inhibiting layer has a thickness of 1.8-20 microns; the anode active material layer has a thickness of 30-340 microns, and the thickness of the lithium-precipitation inhibiting layer is 0.018-0.2 times that of the anode active material layer.
7 . The anode plate according to claim 1 , wherein the lithium-precipitation inhibiting layer has a thickness of 2.3-15 microns; the anode active material layer has a thickness of 55-260 microns, and the thickness of the lithium-precipitation inhibiting layer is 0.023-0.11 times that of the anode active material layer.
8 . The anode plate according to claim 1 , wherein a potential difference between the lithium-precipitation inhibiting layer and the anode active material layer is 1-4 volts.
9 . A lithium-ion battery, which comprises a cathode plate, an electrolyte, and the anode plate according to claim 1 .
10 . The lithium-ion battery according to claim 9 , wherein a capacity ratio of the anode plate and the cathode plate is 1.07 to 1.01.
11 . A method of inhibiting lithium precipitation on a surface of an anode plate in a lithium-ion battery, wherein the method comprises:
providing an anode plate, wherein the anode plate comprises a current collector and an anode active material layer located on at least one surface of the current collector; and
providing a lithium-precipitation inhibiting layer on a surface of the anode active material layer, wherein the lithium-precipitation inhibiting layer contains at least one of following materials: LiNi x Co y Mn z Fe w O 2 , LiMPO 4 , Li 2 M 2 O 4 and Li 4 Ti 5 O 12 , where 0≤x≤1, 0≤y≤1, 0≤z≤1, 0≤w≤1, and x+y+z+w=1, and M is selected from Fe, Co, Ni, Mn or a combination thereof.
12 . A battery module, comprising the lithium-ion battery according to claim 9 .
13 . A battery pack, comprising the battery module according to claim 12 .
14 . A power consumption device, which comprises at least one of the lithium-ion battery according to claim 9 .
15 . A power consumption device, which comprises the battery module according to claim 12 .
16 . A power consumption device, which comprises the battery pack according to claim 13 .