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Electrolyte formulation

An electrolyte solution and battery technology, applied in electrolytes, circuits, electrical components, etc., can solve the problem of battery capacity consumption

Active Publication Date: 2017-04-19
WILDCAT DISCOVERY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this is not ideal since the irreversible formation of SEI consumes the battery capacity and produces gaseous products

Method used

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  • Electrolyte formulation
  • Electrolyte formulation
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Embodiment Construction

[0014] The following definitions apply to some aspects described according to some embodiments of the invention. These definitions can likewise be extended throughout the text. Each term is further explained and exemplified throughout the specification, figures and examples. Any interpretation of the terms in this specification should take into account the entire description, drawings, and examples presented herein.

[0015] The singular terms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to one object may include multiple objects unless the context clearly dictates otherwise.

[0016] The terms "substantially" and "essentially" refer to a substantial degree or extent. When used in connection with an event or circumstance, the term can refer to the occasion in which the event or circumstance occurs exactly, or the occasion in which the event or circumstance occurs in close approximation, as is typic...

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Abstract

An electrolyte formulation including additive compounds to improve the mechanical stability of the solid-electrolyte interface (SEI) on a silicon anode in a lithium ion battery as compared to a conventional electrolyte formulation. Some electrolyte solutions are formulated to contain no ethylene carbonate.

Description

[0001] Background of the invention [0002] The present invention is in the field of battery technology, and more specifically, electrolyte formulations that address difficulties encountered during the use of silicon anodes in lithium-ion batteries. [0003] Lithium-ion batteries enjoy relatively widespread use, but research continues to improve the energy density, capacity, and cycle life of these batteries. For example, silicon has been used as an anode material to increase the energy density of lithium-ion batteries. Due to the high theoretical capacity of silicon, which is 4200 mAh / g, silicon anodes can provide high energy density for Li-ion batteries. However, the silicon particles that make up the anode can undergo large volume changes during battery cycling. The volume change upon lithiation and delithiation cycling can be as large as about 300%. [0004] Large volume changes of these silicon anode materials may have a negative impact on battery cycle life. Multiple m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0525H01M10/0567H01M4/38H01M4/525H01M4/505
CPCH01M4/386H01M4/505H01M4/525H01M10/0525H01M10/0567H01M10/0569Y02E60/10H01M4/134H01M10/0568H01M2300/0037H01M4/405H01M4/46
Inventor 戴德里·斯特兰德马里萨·考德威尔程岗
Owner WILDCAT DISCOVERY TECH