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Lithium ion battery

A technology of lithium-ion batteries and batteries, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of low working potential ion diffusivity, failure, etc., and achieve the effects of cost reduction, phase purity, and simple preparation methods

Pending Publication Date: 2022-08-02
JIANGSU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, graphite is already close to the theoretical value, and may fail in use, making it difficult to meet the energy demand. Metal germanium has a high theoretical specific capacity (1600mAh·g -1 ), excellent electrical conductivity, low working potential and high ion diffusivity, it is considered as the most promising graphite in Li-ion batteries (372mAh g -1 ) one of the alternatives

Method used

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Examples

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Embodiment 1

[0038] A lithium ion battery includes the following structure: a wound cell assembly, an electrolyte solution impregnating the wound cell assembly, a metal casing for loading the wound cell assembly and the electrolyte, and sealing the metal The sealing cover of the outer casing; the wound cell assembly includes a positive electrode foil, a negative electrode foil, and a separator separating the positive electrode foil and the negative electrode foil; the substrate of the positive electrode foil is a carbon-coated aluminum foil, and the carbon-coated aluminum foil contains a positive electrode active material material, the positive active material is LiCoO 2 / C 3 N 4 composite material; the matrix of the negative electrode foil is copper foil, the copper foil contains negative electrode active material, and the negative electrode active material is Zn 2 GeO 4 Material.

[0039] Among them, the preparation of cathode foil: the cathode active material LiCoO 2 / C 3 N 4 The...

Embodiment 2

[0045] The lithium ion battery of this example is the same as that of Example 1, except that the positive electrode active material LiCoO 2 / C 3 N 4 LiCoO in composites 2 and C 3 N 4 The mass ratio of 20:1 is recorded as LiCoO 2 / C 3 N 4 (5wt%).

[0046] The positive electrode active material of this example has the same XRD diffraction peak position as that of the positive electrode active material of Example 1.

Embodiment 3

[0048] The lithium ion battery of this example is the same as that of Example 1, except that the positive electrode active material LiCoO 2 / C 3 N 4 LiCoO in composites 2 and C 3 N 4 The mass ratio of 5:1 is denoted as LiCoO 2 / C 3 N 4 (20wt%).

[0049] The positive electrode active material of this example has the same XRD diffraction peak position as that of the positive electrode active material of Example 1.

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Abstract

The invention relates to a lithium ion battery, which comprises the following structures: a winding battery cell assembly, electrolyte for impregnating the winding battery cell assembly, a metal shell for loading the winding battery cell assembly and the electrolyte, and a sealing cover for sealing the metal shell, the winding cell assembly comprises a positive electrode foil, a negative electrode foil and a diaphragm for separating the positive electrode foil from the negative electrode foil; the positive electrode foil comprises a positive electrode active material, and the positive electrode active material is a LiCoO2 / C3N4 composite material; the negative electrode foil comprises a negative electrode active substance, the negative electrode active substance is an M2GeO4 material, and M is selected from one or more of Zn, Mn, Co and Cd, specifically one of Zn2GeO4, Mn2GeO4, Co2GeO4 and Zn1. 8Cd0. 2GeO4; the battery provided by the invention has relatively high reversible capacity, relatively good cycle performance and rate capability, and relatively stable fast charging performance.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a lithium ion battery. Background technique [0002] The development of green energy is an important topic at present. Lithium-ion batteries have the advantages of high energy density, long service life and strong endurance, and are widely used in electronic portable devices and electric vehicles. [0003] At present, commercial cathode materials include lithium cobalt oxide, lithium manganate, lithium iron phosphate, and high-nickel ternary lithium batteries. Among them, lithium cobalt oxide has relatively stable cycle performance, lithium manganate has a lower cost, and lithium iron phosphate has better adaptability to large temperature differences. Although lithium cobalt oxide has good chemical stability and large capacity, it has the problems of high price and poor conductivity. Commercial anode materials are mainly graphite, which has the advantages of high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/485H01M4/58H01M10/0525H01M10/0587
CPCH01M10/0525H01M10/0587H01M4/362H01M4/485H01M4/58Y02P70/50
Inventor 宋忠诚邢旭孙丽侠娄正松
Owner JIANGSU UNIV OF TECH
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