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Negative electrode for lithium secondary battery, method of manufacturing the same, and lithium secondary battery employing the same

A technology for lithium secondary batteries and negative electrodes, which is applied in the field of lithium secondary batteries and negative electrodes for lithium secondary batteries, can solve the problems of deterioration of battery performance, reduction of reversibility of charging and discharging, etc.

Inactive Publication Date: 2012-10-31
SAMSUNG ELECTRONICS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, when lithium metal is used as the anode, there are problems of lowering charge and discharge reversibility through dendrite growth on the surface of the lithium metal anode during charge and discharge; and increasing surface resistance and making the reaction uniform by reacting with the liquid electrolyte. The reversibility of charging and discharging is reduced due to the deterioration of the performance
[0004] In addition, chemicals eluting from the positive electrode or reaction products of the positive electrode with the electrolyte, or the reaction of the positive active material with the negative electrode, can degrade the performance of the battery

Method used

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  • Negative electrode for lithium secondary battery, method of manufacturing the same, and lithium secondary battery employing the same
  • Negative electrode for lithium secondary battery, method of manufacturing the same, and lithium secondary battery employing the same
  • Negative electrode for lithium secondary battery, method of manufacturing the same, and lithium secondary battery employing the same

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preparation example Construction

[0110] The preparation of the lithium ion conductive porous layer may include (a) mixing and sintering ceramic precursors to obtain ceramic powder; and (b) pressing and sintering the ceramic powder to prepare the lithium ion conductive porous ceramic layer.

[0111] (a) The mixing and sintering of ceramic precursors to obtain ceramic powder may include, for example, grinding the ceramic precursors by a mortar, ball mill, or the like for mixing.

[0112] The ceramic precursor may include a lithium salt and two or more oxides, nitrates, carbonates, hydroxides, or oxides of phosphorus of an element selected from the group consisting of alkali metals, alkaline earth metals, lanthanum metals, Al, Ga, Zr, Ti, Ge, Co, W, Mo, Si, Sn, Mn, Ni, Fe, Cr, As, Nb and Ta.

[0113] The ceramic precursor may include, for example, Li 2 CO 3 , Al(NO 3 ) 3 、TiO 2 , SiO 2 、GeO 2 , Al(PO 3 ) 3 , Nb 2 o 5 、 Ta 2 o 5 Wait.

[0114] The ceramic precursor may further include NH 4 h 2 PO ...

Embodiment 1

[0286] Embodiment 1: the manufacture of organic-inorganic hybrid protective layer

[0287] 71.72g Li 2 CO 3 , 127.79g TiO 2 , 150.05g Al(NO 3 ) 3 and 345.08 g NH 4 h 2 PO 4 Grind and mix in a mortar, and heat the mixture in an electric furnace at about 1100° C. for 2 hours. Subsequently, 200 mg of the resultant was ground, manufactured into a film having a thickness of about 100 μm by using a doctor blade, and then heated again at about 1100° C. for 1 hour to manufacture a lithium ion conductive porous ceramic layer. The Li-ion conductive porous ceramic layer was identified as Li 1.4 Ti 1.6 Al 0.4 P 3 o 12 .

[0288] 100 mg of the lithium ion conductive porous ceramic layer was immersed in about 1 ml of THF solution including 2.16 mg of 1,3-phenylenediamine and 6.81 mg of 2,2-bis(4-glycidyloxyphenyl)propane, The solvent was removed by heating under vacuum at about 80° C. for 2 hours, and then dried in a vacuum oven at about 150° C. for 24 hours to fabricate an ...

Embodiment 2

[0289] Embodiment 2: the manufacture of organic-inorganic hybrid protective layer

[0290] Add 1.02g Al 2 o 3 To fabricate a lithium ion conductive porous ceramic layer, and fabricate an organic-inorganic hybrid protective layer in the same manner as in Example 1, except that the lithium ion conductive porous ceramic layer is Li 1.4 Ti 1.6 Al 0.42 P 3 o 12.03 outside.

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Abstract

A negative electrode for a lithium secondary battery that includes an organic-inorganic hybrid protective layer where the lithium ion conductivity of a polymer included in the organic-inorganic hybrid protective layer is about 10 -4 S / cm or less, a method of manufacturing the same, and a lithium secondary battery employing the same.

Description

technical field [0001] The present disclosure relates to a negative electrode for a lithium secondary battery, a manufacturing method thereof, and a lithium secondary battery using the same, and more particularly, to a negative electrode for a lithium secondary battery including an organic-inorganic hybrid (hybrid) protective layer , a manufacturing method thereof, and a lithium secondary battery using the same. Background technique [0002] The lithium metal anode has a theoretical capacity of about 3860 mAh / g. The theoretical capacity of the lithium metal negative electrode is about 10 times higher than that of the graphite negative electrode typically used in current lithium secondary batteries, which is about 372 mAh / g. Lithium metal anodes have attracted attention as anodes for next-generation lithium secondary batteries. [0003] However, when lithium metal is used as the anode, there are problems of lowering charge and discharge reversibility through dendrite growth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/13H01M4/139H01M10/0525
CPCH01M2300/0065H01M12/08H01M10/0566H01M10/0565Y02E60/128H01M10/0525H01M10/0562Y02E60/122Y02E60/10H01M4/13H01M10/052H01M4/38H01M4/139Y02P70/50
Inventor 林东民李东埈武田保雄山本治今西诚之
Owner SAMSUNG ELECTRONICS CO LTD
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