Lithium battery with multiple network structures

A technology of network structure and lithium battery, applied in secondary battery, non-aqueous electrolyte battery, electrolyte battery manufacturing, etc., to avoid pulverization, reduce volume expansion, inhibit or weaken the effect of lithium dendrite growth

Inactive Publication Date: 2019-01-01
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, the patent is mainly aimed at the negative electrode active material, and the cyclic polymer involved is actually a linear cellulose polymer, so the interpenetration mentioned is actually a semi-interpenetrating form in the strict sense, and the semi-interpenetrating form is not Composed of cross-linked polymers and linear polymers, its mechanical properties need to be further improved

Method used

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  • Lithium battery with multiple network structures
  • Lithium battery with multiple network structures
  • Lithium battery with multiple network structures

Examples

Experimental program
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Effect test

Embodiment 1

[0027] In this example, see figure 1 and figure 2 , a lithium battery with a multiple network structure, including an electrolyte, a positive electrode, a negative electrode and a separator, the polymer of the multiple network structure exists in the electrolyte, the positive electrode, the negative electrode, the interface between the electrolyte and the positive electrode, the electrolyte and the positive electrode in an interpenetrating or semi-interpenetrating form The interface between the negative electrodes forms an interpenetrating or semi-interpenetrating microstructure through the binder composition.

[0028] The positive electrode is lithium cobalt oxide (LiCoO 2 ): acetylene black: the mass parts ratio of vinylidene fluoride (PVDF) is 80:10:10;

[0029] The negative electrode is a lithium metal negative electrode; the separator is a polyethylene separator, and the thickness of the separator is 14 μm;

[0030] LiPF in electrolyte 6 The concentration of (lithium...

Embodiment 2

[0035] This embodiment is basically the same as Embodiment 1, and the special features are:

[0036] In this embodiment, a lithium battery with a multiple network structure includes an electrolyte, a positive electrode, a negative electrode, and a separator, and polymers with a multiple network structure exist in the electrolyte, positive electrode, negative electrode, electrolyte, and positive electrode in an interpenetrating or semi-interpenetrating form. The interface between the electrolyte and the negative electrode forms an interpenetrating or semi-interpenetrating microstructure through the adhesive composition.

[0037] The positive electrode is lithium cobalt oxide (LiCoO 2 ): acetylene black: the mass parts ratio of vinylidene fluoride (PVDF) is 80:10:10;

[0038] The negative electrode is a lithium metal negative electrode; the separator is a polyethylene separator, and the thickness of the separator is 14 μm;

[0039] LiPF in electrolyte 6 The concentration of (...

Embodiment 3

[0044] This embodiment is basically the same as the previous embodiment, and the special features are:

[0045] In this embodiment, a lithium battery with a multiple network structure includes an electrolyte, a positive electrode, a negative electrode, and a separator, and polymers with a multiple network structure exist in the electrolyte, positive electrode, negative electrode, electrolyte, and positive electrode in an interpenetrating or semi-interpenetrating form. The interface between the electrolyte and the negative electrode forms an interpenetrating or semi-interpenetrating microstructure through the adhesive composition.

[0046] The positive electrode is lithium cobalt oxide (LiCoO 2 ): acetylene black: the mass parts ratio of vinylidene fluoride (PVDF) is 80:10:10;

[0047] The negative electrode is a lithium metal negative electrode; the separator is a layer-by-layer self-assembled ZrO2 / POSS nanoscale organic-inorganic hybrid modified polyethylene separator, and t...

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Abstract

The invention discloses a lithium battery with multiple network structures, multiple network structures are constructed in situ between a positive electrode and a negative electrode, between an electrolyte and the positive electrode, and between the electrolyte and the negative electrode in an interpenetration or semi-interpeneration form, the multi-network structure can effectively prevent liquidleakage due to the use of a liquid electrolyte, contributing to stabilization of an electrode, the electrode is avoided from structure collapse, pulverization and separation from the current collector due to the volume change of the electrode, the interface performance between the electrolyte and electrode is improved, enhance the effective migration and diffusion of lithium ions between electrolyte, electrolyte and electrode as well as inside electrode, restrain or weaken the generation and growth of lithium dendrites, so as to improve the battery performance and safety performance of a lithium battery system.

Description

technical field [0001] The invention relates to a lithium battery, in particular to a lithium battery with a network microstructure material, which is applied in the technical field of batteries. Background technique [0002] Lithium batteries have been commercialized by Sony Corporation since 1991, because of their high output power, relatively high energy density, small self-discharge phenomenon, wide operating temperature window, high voltage, no memory effect and relatively friendly environment, etc. It has gradually been applied in the fields of electric vehicles, large-scale energy storage, smart grid and aerospace, and occupies a large market share. At present, traditional commercial lithium batteries mainly use electrolytes, which are generally organic liquid electrolytes. The liquid electrolyte has a potential safety hazard of leakage during the working process of the lithium battery and may even cause an explosion; at the same time, the liquid electrolyte is prone...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/058H01M10/0525H01M10/0565
CPCH01M10/0525H01M10/0565H01M10/058Y02E60/10Y02P70/50
Inventor 袁帅邱郑富施利毅王竹仪
Owner SHANGHAI UNIV
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