Lithium-ion battery

A lithium-ion battery, negative electrode technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve problems such as capacity fading

Active Publication Date: 2008-10-01
MEDTRONIC INC
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0005] A challenge with conventional Li-ion batteries is that they may exhibit capacity fade during the battery life due to battery aging and cycling

Method used

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Examples

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Embodiment Construction

[0019] According to an exemplary embodiment, there may be provided a battery which may exhibit enhanced resistance to capacity fading during battery life. The battery includes a carbon-containing negative electrode and an electrolyte including one or more additives for reducing the amount of capacity fade experienced by the battery during use. Such batteries may be used in any of a number of applications, including implantable medical devices, that require a relatively constant capacity throughout their useful life.

[0020] Referring to FIG. 2 , a schematic cross-sectional view of a portion of a Li-ion battery 100 is shown, according to an exemplary embodiment. According to an exemplary embodiment, battery 100 is rated between approximately 10 and 1000 milliamp hours (mAh). According to another exemplary embodiment, the battery is rated between approximately 100 and 400 mAh. According to another exemplary embodiment, the battery is an approximately 300mAh battery. Accordin...

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Abstract

A lithium-ion battery (100) includes a positive electrode (110), a negative electrode (120) comprising carbon, and an electrolyte (130) containing a first and second additive. The first additive includes a borane or borate compound that acts as an ion receptor and the second additive includes an alkene capable of reacting on a surface of the negative electrode (120) to form an ionically conductive layer.

Description

Background technique [0001] The present invention relates generally to the field of lithium batteries. In particular, the present invention relates to lithium-ion batteries that are less susceptible to capacity fade over the life of the battery. [0002] A lithium-ion battery comprises a positive current collector (e.g. aluminum such as aluminum foil) and a negative current collector (e.g. copper such as copper foil) on which an active material (e.g. LiCoO 2 ), an active material (for example, a carbonaceous material such as graphite) is provided on the negative current collector. The positive current collector together with the active material provided thereon is called a positive electrode, and the negative current collector and the active material provided thereon are called a negative electrode. [0003] Figure 1 shows a schematic representation of a portion of a conventional Li-ion battery 10 as described above. The battery 10 includes: a positive electrode 20 includin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/40H01M4/02H01M4/58H01M4/587H01M10/0525H01M10/0567H01M10/36
CPCH01M10/0567H01M4/587H01M10/0525A61N1/378Y02E60/10
Inventor E·R·斯科特W·G·霍华德
Owner MEDTRONIC INC
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