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Thin-film lithium battery and preparation method thereof

A lithium battery and thin film technology, applied in the field of thin film lithium battery and its preparation, can solve the problems of inflexibility and inability to prepare battery thin films, and achieve the effects of reducing stress, improving reliability and good electrical performance

Inactive Publication Date: 2014-03-26
TIANJIN LISHEN BATTERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The main substrates of existing thin-film ion batteries are silicon substrates and stainless steel substrates. The main disadvantage is that they are not bendable and cannot be made into flexible battery films.

Method used

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  • Thin-film lithium battery and preparation method thereof

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Embodiment

[0031] Such as figure 1 Shown is a thin-film lithium battery, including a protective case and a substrate, the protective case is provided with a positive electrode, a negative electrode and an electrolyte, and the substrate is a flexible material substrate.

[0032] The flexible material substrate is a flexible substrate made of polyethylene terephthalate.

[0033] The titanium dioxide interface layer is sputtered on the flexible material substrate, and the main purpose of sputtering the titanium dioxide is to play the role of a buffer layer, which can reduce the stress generated in the thin film battery.

[0034] The thickness range of the titanium dioxide interface layer is 200nm-500nm.

[0035] The above-mentioned preparation method of a thin film lithium battery is characterized in that the following steps are carried out in sequence:

[0036] (1) Prepare a flexible material as a substrate, and use a titanium target to coat it on the substrate of a flexible plate under ...

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Abstract

The invention discloses a thin-film lithium battery, which comprises a protective shell and a substrate, an anode, a cathode and electrolyte are arranged in the protective shell, the substrate is a flexible material substrate, and a titanium dioxide interface layer is sputtered on the flexible material substrate. Compared with the prior art, the thin-film lithium battery has the advantages that: because flexible material is used as the substrate material, besides the advantages of the thin-film batteries, the battery also has the characteristic of flexibility, and consequently, the battery can be used not only in miniature devices but also in conventional products. Meanwhile, the thin-film lithium battery avoids the problems of leakage, low active substance proportion and the like in conventional lithium ion batteries, and the reliability of the battery is greatly enhanced. The titanium dioxide interface layer added in the thin-film lithium ion battery can effectively decrease the stress between the interface pattern layers of the battery, so the electrical properties of the battery can be better exerted.

Description

technical field [0001] The invention relates to the technical field of thin-film lithium batteries, in particular to a thin-film lithium battery using a flexible composite material as a substrate and a preparation method thereof. Background technique [0002] With the development of the electronics industry, many microelectronic devices currently require micro-power supplies that can integrate low-current outputs, such as: micro-implantation medical equipment (cardiac pacemaker, neurostimulator and drug delivery system), CMOS-based integrated circuits, bank anti-theft Tracking systems, electronic anti-theft protection, miniature gas sensors, miniature coulomb counters, smart security cards, flat curve wireless asset tracking identification, electronic record tracking systems, and any miniature device that requires an ultra-thin, lightweight, high-energy power supply. Thin-film secondary lithium-ion battery is the latest field of lithium-ion battery development, and its thick...

Claims

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Application Information

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IPC IPC(8): H01M10/0525H01M2/10H01M2/16H01M10/058H01M50/105H01M50/14H01M50/431
CPCY02E60/122H01M10/0525H01M10/058H01M50/116Y02E60/10Y02P70/50
Inventor 王俊明阳晓霞冯辉陈欣
Owner TIANJIN LISHEN BATTERY
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