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Hybrid solid-liquid electrolyte lithium storage battery

A lithium battery and solid-state electrolyte technology, applied in the direction of non-aqueous electrolyte battery, electrolyte battery manufacturing, lithium battery, etc., can solve problems such as lithium battery safety hazards, lithium battery short circuit, etc., achieve excellent mechanical strength, ensure normal use, and improve safety Effects on Performance and Battery Performance

Inactive Publication Date: 2019-05-17
ZHEJIANG FUNLITHIUM NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, although the diaphragm has a good supporting effect, if the diaphragm is pierced or hit by a foreign object such as a steel needle and ruptures, the liquid electrolyte in the lithium battery will fill the ruptured part of the diaphragm, so that the positive and negative electrodes inside the lithium battery interact with each other. Connected, resulting in a short circuit of the lithium battery, so the lithium battery has certain safety hazards

Method used

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  • Hybrid solid-liquid electrolyte lithium storage battery

Examples

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Embodiment 1

[0061] see figure 2 , a method for preparing a mixed solid-liquid electrolyte lithium storage battery, comprising the following steps:

[0062] ① Preparation of buffer gel

[0063] Prepare the buffer rubber for forming the first buffer rubber layer 32 and the second buffer rubber layer 33, and the composition of the first buffer rubber layer 32 and the second buffer rubber layer 33 is the same, specifically: weighed according to the weight ratio of 5:1 Take 5g of the buffer rubber layer lithium salt LiTFSI and 1g of the buffer rubber layer additive PEO, dissolve the two in 114g of acetonitrile to form an organic polymer electrolyte gel with a solid content of 5%, then add the buffer rubber layer inorganic solid electrolyte LLTO, mix and disperse Form corresponding buffer glue, wherein the weight of the inorganic solid electrolyte of the buffer glue layer respectively accounts for 40% of the weight of the corresponding electrolyte buffer glue.

[0064] ② Preparation of solid...

Embodiment 2

[0077] The difference from Example 1 is that in the preparation of the buffer glue in this embodiment, the buffer glue layer additive is PEO, only the buffer glue layer lithium salt is added in the second buffer glue layer 33, and the buffer glue layer lithium salt For LiTFSI, weigh 5g of the buffer rubber layer lithium salt LiTFSI and 10g of the buffer rubber layer additive PEO in acetonitrile according to a weight ratio of 5:10 to form an organic polymer electrolyte gel with a solid content of 10%; the buffer rubber layer inorganic solid electrolyte For LAGP, in the formed electrolyte buffer gel, the weight of the inorganic solid electrolyte of the buffer gel layer accounts for 60% of the weight of the corresponding electrolyte buffer gel.

[0078] In the preparation of the solid electrolyte masterbatch, the core layer inorganic solid electrolyte is LAGP, the electrolyte polymer is PAA, and the electrolyte additive is stearic acid, and the weight of the core layer inorganic s...

Embodiment 3

[0084] The difference from Example 1 is that in the preparation of the buffer glue in this embodiment, the buffer glue layer additive is PEC, and the buffer glue layer lithium salt is LiBOB, which weighs 10g of the buffer glue layer lithium in a weight ratio of 1:1. The salt LiBOB and the buffer layer additive PEC are dissolved in water to form an organic polymer electrolyte gel with a solid content of 10%. The buffer layer inorganic solid electrolyte is LATP. In the formed electrolyte buffer gel, the weight of the buffer layer inorganic solid electrolyte is respectively Accounting for 20% of the weight of the corresponding electrolyte buffer gel.

[0085] In the preparation of solid electrolyte masterbatch, the core layer inorganic solid electrolyte is a mixture of LATP and LLTO with a weight ratio of 1:1, the electrolyte polymer is PMMA, the electrolyte additive is paraffin, and the core layer inorganic solid electrolyte LATP, electrolyte polymer PMMA The weight ratio of par...

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Abstract

The invention belongs to the technical field of a solid-state lithium battery, and particularly discloses a hybrid solid-liquid electrolyte lithium storage battery. The lithium storage battery comprises a positive electrode plate, a negative electrode plate and a composite solid-state electrolyte piece, wherein the composite solid-state electrolyte piece is arranged between the positive electrodeplate and the negative electrode plate and comprises a solid-state electrolyte core layer and buffer glue layers, the buffer glue layers are arranged at two sides of the solid-state electrolyte core layer, the solid-state electrolyte core layer is formed by mainly mixing core layer inorganic solid-state electrolyte, an electrolyte polymer and an electrolyte additive, and each buffer glue layer isformed by mainly mixing a buffer glue layer inorganic solid-state electrolyte, a buffer glue layer lithium salt and a buffer glue layer additive. During fabrication of the lithium storage battery, a co-extrusion technology and a rolling technology are combined, primary processing and formation are achieved, the lithium storage battery has the characteristics of high production efficiency and is simple and convenient to operate, and the fabricated lithium storage battery has relatively high electric cycle property and safety.

Description

technical field [0001] The invention belongs to the technical field of lithium storage batteries, in particular to a mixed solid-liquid electrolyte lithium storage battery. Background technique [0002] In the mixed solid-liquid electrolyte lithium battery, the solid electrolyte is the main electrolyte component, and the liquid electrolyte supplements the solid electrolyte. Compared with the traditional liquid lithium battery, the mixed solid-liquid electrolyte lithium battery has high energy density, good mechanical properties, and safety. Good sex and other advantages. After using a mixed solid-liquid electrolyte, lithium batteries can directly use metallic lithium as the negative electrode, which significantly increases the energy density of the battery. At the same time, the solid electrolyte film can also inhibit the formation of lithium dendrites, which significantly improves the safety performance of lithium batteries. [0003] At present, there are three main types ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/052H01M10/0562H01M10/0565H01M10/0567H01M10/058
CPCH01M10/0565H01M10/052H01M10/0567H01M10/058H01M10/0562H01M2300/0068H01M2300/0091H01M2300/0094H01M2300/0082H01M10/0568Y02E60/10Y02P70/50H01M10/056H01M10/0585H01M2300/0025H01M10/0525
Inventor 许晓雄丁超张永龙张赞赞
Owner ZHEJIANG FUNLITHIUM NEW ENERGY TECH CO LTD
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