Three-dimensional porous substrate material for negative electrode of lithium metal battery as well as preparation method and application of three-dimensional porous substrate material
A lithium metal battery, three-dimensional porous technology, applied in nanotechnology for materials and surface science, battery electrodes, lithium batteries, etc., can solve the problems of battery safety and electrical cycle instability, and achieve high mechanical flexibility and excellent electrical conductivity permanent, easy-to-composite effects
Pending Publication Date: 2022-05-17
HARBIN NORMAL UNIVERSITY
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Problems solved by technology
[0004] The present invention aims at battery safety problems caused by the dendrite growth of metal lithium negative electrodes in metal lithium batteries and the instability of electric cycles in the cycle process, and provides a three-dimensional porous base material for lithium metal battery negative electrodes and a preparation method thereof and application
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specific Embodiment approach 1
[0040] Specific Embodiment 1: In this embodiment, a three-dimensional porous base material for lithium metal battery negative electrode is composed of metal foam and metal carbon / nitride; the metal carbon / nitride is Mxenes, and the chemical formula is M n+1 x n T x , wherein M is a transition metal element, X is C or N; n=1, 2 or 3, and T is O, OH or F.
specific Embodiment approach 2
[0041] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the heat transfer coefficient of the foamed metal: > 6w / (m 2 k), mechanical strength: ≥2.5MPa, tensile strength: 5-18Kpa, pore diameter: 0.1-10mm, porosity: 60-98%, through-porosity: ≥98, bulk density: 0.5-1.5g / cm 3 , PPI (number of holes per inch): 5-130. Other steps are the same as in the first embodiment.
specific Embodiment approach 3
[0042] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the metal foam is Cu foam, Ni foam, NiCrFe foam, ZnCu foam, NiCu foam, NiCrW foam or NiFe foam. Other steps are the same as those in Embodiment 1 or 2.
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Abstract
The invention discloses a three-dimensional porous substrate material for a lithium metal battery negative electrode and a preparation method and application thereof, and relates to a three-dimensional porous substrate material and a preparation method and application thereof. The invention aims to solve the problems of battery safety and instability of electric circulation caused by dendritic crystal growth of a metal lithium negative electrode in a metal lithium battery in a circulation process. The invention discloses a three-dimensional porous substrate material for a lithium metal battery negative electrode. The three-dimensional porous substrate material consists of foam metal and metal carbon/nitride. The method comprises the following steps: 1, pretreating foam metal; 2, preparing a two-dimensional MXenes nano material; and 3, preparing the three-dimensional porous substrate material. The three-dimensional porous substrate material for the negative electrode of the lithium metal battery is used as a substrate material of the negative electrode of the lithium metal battery. The three-dimensional porous substrate material for the negative electrode of the lithium metal battery has huge application potential in the lithium metal battery. The three-dimensional porous substrate material for the negative electrode of the lithium metal battery can be obtained.
Description
technical field [0001] The invention relates to a three-dimensional porous substrate material and its preparation method and application. Background technique [0002] Today's portable electronic devices, electric vehicles, large power grids, etc. have increasingly high demands on the energy density of batteries. Lithium-ion battery is by far the most mature and widely used secondary battery system. Although lithium-ion batteries have obvious advantages over traditional lead-acid batteries and nickel-metal hydride batteries. However, its low energy density can no longer meet people's increasing demands for high energy density, low cost, and miniaturization of power equipment. Graphite, as a common anode material in lithium-ion batteries, has a relatively low specific capacity (370m Ahg -1 ), after recent years of development, it has approached its theoretical energy density limit, and it is difficult to further increase the battery energy density. In contrast, metallic l...
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IPC IPC(8): H01M4/36H01M4/38H01M4/58H01M10/052B82Y30/00B82Y40/00
CPCH01M4/362H01M4/38H01M4/58H01M10/052B82Y30/00B82Y40/00H01M2004/027Y02E60/10
Inventor 武立立张喜田马新志卢会清张利源
Owner HARBIN NORMAL UNIVERSITY
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