All-solid-state battery containing nano-solid electrolyte and method of manufacturing the same

A technology of all-solid-state batteries and solid electrolytes, applied in the manufacture of electrolyte batteries, solid electrolytes, non-aqueous electrolyte batteries, etc., can solve problems such as increasing discharge capacity, reducing interface resistance, and reducing conductivity

Active Publication Date: 2016-09-21
HYUNDAI MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] However, despite such advantages, all-solid-state lithium-ion rechargeable batteries may have a disadvantage in that they are difficult to commercialize due to low battery performance
Such a lithium ion rechargeable battery may have the effect of reducing the interface resistance and increasing the discharge capacity, but may also have problems in that the method of forming the porous body is cumbersome and due to the organic polymer used to form the porous body such as carboxymethyl Cellulose-based (CMC) and Styrene Butadiene Rubber (SBR) enable lower conductivity

Method used

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  • All-solid-state battery containing nano-solid electrolyte and method of manufacturing the same
  • All-solid-state battery containing nano-solid electrolyte and method of manufacturing the same
  • All-solid-state battery containing nano-solid electrolyte and method of manufacturing the same

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Embodiment 1

[0052] Example 1: Manufacture of an all-solid-state battery comprising a nano-solid electrolyte

[0053] 1. Fabrication of solid electrolyte

[0054] To fabricate stacks for all-solid-state batteries, a solid electrolyte is first prepared. By mixing Li at a molar ratio of 75:25 2 S (Alfa, 99.9%) (amorphous sulfide solid electrolyte) and P 2 S 5 Starting powder (Aldrich, 99%), followed by high-energy mechanical milling for 20 hours, to obtain a solid electrolyte. Because the sulfide-based solid electrolyte reacts with moisture, the above process was performed in a glove box under a nitrogen atmosphere to avoid contact with moisture in the air, and then heat-treated at a temperature of 230°C that can precipitate a metastable electrolyte with high ionic conductivity Amorphous solid electrolyte synthesized by milling method for 3 hours to become solid electrolyte in glass-ceramic state.

[0055] 2. Preparation of composite cathode slurry

[0056] Thoroughly mix lithium cob...

Embodiment 2

[0069] Example 2: When the ratio of polymer gel electrolyte and nano solid electrolyte is different

[0070] An all-solid-state battery was manufactured in the same manner as in Example 1, except that the polymer gel electrolyte and the nanoscale solid electrolyte (75Li 2 S·25P 2 S 5 ).

[0071] The all-solid-state battery was tested for evaluation in the same manner as the all-solid-state battery of the present invention. The results show that when the polymer gel electrolyte and the nanoscale solid electrolyte are mixed at a ratio of 15:85 by weight, the discharge capacity is 135mAh / g (average value of five times), while the all-solid-state battery of this embodiment The discharge capacity is 77mAh / g.

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Abstract

Provided is an all-solid-state battery containing a nano-solid electrolyte which has excellent stability and enhanced battery performance and can be manufactured without changing an existing process, and a method of manufacturing the same. Due to substantially improved battery performance, as well as having excellent safety, the all-solid-state battery containing a nano-solid electrolyte may be widely used and further contribute to industrial development such as electric vehicles in which medium and large lithium ion rechargeable batteries are used.

Description

[0001] References to related applications [0002] This application is based on and claims the benefit of priority from Korean Patent Application No. 10-2015-0032390 filed with the Korean Intellectual Property Office on March 9, 2015, the entire contents of which are hereby incorporated by reference. technical field [0003] The present invention relates to an all-solid-state battery comprising a nano-solid electrolyte (electrolyte), which may have improved stability and enhanced performance, and which may be fabricated without changing the process. Background technique [0004] Lithium-ion rechargeable batteries, originally distributed by Sony Corporation in the 1990s, have been developed at a rapid pace and, in particular, have become essential components in portable devices such as smartphones and notebook computers. According to the development of small lithium-ion rechargeable batteries, recently, the market of medium and large rechargeable batteries has grown regularly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0562H01M10/052
CPCH01M10/052H01M10/0562H01M4/13H01M4/382H01M4/525H01M4/623H01M4/625H01M10/0525H01M10/056H01M10/058H01M10/44H01M2300/0068H01M2300/0085H01M2300/0088Y02E60/10Y02P70/50H01M4/049H01M10/0565H01M2300/0082H01M4/485H01M4/505H01M4/587H01M2220/20Y02T10/70
Inventor 李尚宪郑竝早尹龙燮金敬洙闵泓锡
Owner HYUNDAI MOTOR CO LTD
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