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Lithium cell having an alkaline-earth metal carboxylate separator

A metal carboxylate and lithium battery technology, applied in the field of positive electrodes, to achieve the effect of increasing life and improving safety characteristics

Pending Publication Date: 2016-03-23
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Other separators made of high-melting point polymers, such as polyimide separators, although more thermally and mechanically stable than polyolefin separators in the case of high-capacity batteries such as Amine separators are also not always sufficiently inherently safe in case of mechanical or thermal stress

Method used

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  • Lithium cell having an alkaline-earth metal carboxylate separator
  • Lithium cell having an alkaline-earth metal carboxylate separator
  • Lithium cell having an alkaline-earth metal carboxylate separator

Examples

Experimental program
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Embodiment

[0099] 1. Fabrication of Reference Cell with Uncoated PE Separator (Variant A)

[0100] Ten lithium-ion batteries were mass-produced, each having a 25 μm thick polyethylene separator (PE separator).

[0101] Here, the positive electrode contains lithium cobalt oxide (LiCoO 2 ) and lithium nickel cobalt manganese oxide (LiNi 0.33 co 0.33 mn 0.33 o 2 ), and the negative electrode contains synthetic graphite (MCMB6-28, Osaka Gas Corporation, Japan). The nominal capacity is 40Ah. The battery's 100% state of charge (English: StateofCharge: SOC) is 4.20V.

[0102] 2. Fabrication of batteries according to the invention: Ca(CH-based 3 COO) 2 PE separator of protective layer (variation B)

[0103] Mass production of ten Li-ion batteries each with a 25 μm thick polyethylene separator (PE separator) coated on both sides with 5 μm thick calcium acetate (Ca(CH 3 COO) 2 ) of the protective layer.

[0104] The positive electrode contains lithium cobalt oxide (LiCoO 2 ) and lithi...

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Abstract

The present invention relates to a lithium cell (10), comprising a negative electrode (11) and a positive electrode (12). In order to increase the safety and service life of the cell (10), the cell (10) comprises at least one porous protective layer (13) arranged between the negative electrode (11) and the positive electrode (12), which protective layer (13) comprises at least one alkaline-earth metal carboxylate. The invention further relates to a separator (14), a negative electrode (11), and a positive electrode (12) for a lithium cell (10) that have such a protective layer (13).

Description

technical field [0001] The present invention relates to a lithium battery, a separator, and a negative electrode and a positive electrode for the lithium battery. Background technique [0002] Lithium-ion technology is destined for a wide application field of applications. Lithium-ion batteries, also known as lithium-polymer batteries (or lithium-ion polymer batteries), are especially characterized by a high energy density and specific energy as well as a very low self-discharge, especially if they have an aluminum composite film encapsulation. Lithium-ion batteries have at least one negative electrode (anode) and a positive electrode (cathode) into which lithium ions can be swapped in or out reversibly; this is also known as intercalation or deintercalation. Lithium hexafluorophosphate (LiPF 6 ). [0003] Due to the high energy density of lithium-ion batteries both by weight and by capacity, high intrinsic safety or intrinsic safety (English: Intrinsic Safety) in lithium...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/16H01M10/052H01M10/42H01M50/417H01M50/426H01M50/431H01M50/451H01M50/457
CPCH01M10/052H01M10/0525H01M10/4235Y02E60/10H01M50/431H01M50/446H01M50/46H01M50/417H01M50/451H01M50/457H01M50/426Y02T10/70
Inventor T.韦尔勒F.埃贝勒C.I.武尔姆荻原秀树
Owner ROBERT BOSCH GMBH