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Lithium secondary battery

A lithium secondary battery and lithium salt technology, which is applied in secondary batteries, lithium batteries, secondary battery repair/maintenance, etc., can solve the problems of suppressing the oxide layer, which have not yet been realized, achieve large battery capacity, and improve cycle life Characteristics, long life effect

Pending Publication Date: 2021-03-16
LG ENERGY SOLUTION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Although the prior art literature has somewhat ameliorated the problem of oxide layer formation due to lithium metal reactivity by performing a vacuum deposition process during the formation of the lithium anode, the electrode is still exposed to the atmosphere during the battery assembly process. , so fundamental suppression of oxide layer formation has not yet been achieved

Method used

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Examples

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Effect test

Embodiment 1

[0179] Using LiCoO in N-methyl-2-pyrrolidone 2 (LCO) as the positive electrode active material, positive electrode active material: conductive material (super-P): binding agent (PVdF) is mixed with the weight ratio of 95:2.5:2.5, then make the weight ratio relative to LCO be 20% Add L2N(Li 2 NiO 2 ), and the resultant was mixed for 30 minutes using a paste mixer to prepare a positive electrode slurry composition.

[0180] The above-prepared slurry composition was dried at 130 °C for 12 hours on an aluminum foil with a thickness of 20 μm as a positive electrode current collector to prepare a 2 The positive electrode of the load.

[0181] As the negative electrode, copper foil having a thickness of 100 μm was prepared as a negative electrode current collector.

[0182] Between the above-prepared positive electrode and the negative electrode current collector, a polyethylene separator was disposed to prepare an electrode assembly, and the electrode assembly was placed inside ...

Embodiment 2

[0185] In addition to LiN in the preparation of the electrolyte 3 Except that the content of was changed to 5% by weight, an anode-free lithium secondary battery was manufactured in the same manner as in Example 1.

Embodiment 3

[0187] In addition to LiN in the preparation of the electrolyte 3 Except that the content of was changed to 10% by weight, an anode-free lithium secondary battery was produced in the same manner as in Example 1.

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Abstract

The present invention relates to a lithium secondary battery, which is manufactured as an anode-free battery to allow a lithium metal to be formed on an anode current collector by means of charging and employs an electrolyte containing a sacrificial salt. In the lithium secondary battery, a problem due to high reactivity of the lithium metal in the conventional art can be fundamentally solved by forming the lithium metal in a state of being blocked from the atmosphere, and the deterioration in capacity and lifespan characteristics of the battery can be prevented by containing the sacrificial salt in the electrolyte to thereby reduce the consumption of lithium resulting from an irreversible reaction in an anode.

Description

technical field [0001] This application claims based on Korean Patent Application No. 10-2018-0130620 filed with KIPO on October 30, 2018 and Korean Patent Application No. 10-2019-0136866 filed with KIPO on October 30, 2019 The disclosures of these Korean patent applications are hereby incorporated by reference in their entirety for the benefit of priority of No. [0002] The present invention relates to a lithium secondary battery with an anode-free structure using an electrolyte containing a sacrificial salt. Background technique [0003] With the rapid development of electrical, electronic, communication, and computer industries, the demand for high-performance and high-stability secondary batteries has grown rapidly recently. In particular, with the trend of lighter, thinner, smaller and portable batteries and electronic products, weight reduction and miniaturization have also been required for secondary batteries, which are key components. Furthermore, since the deman...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0567H01M10/0568H01M4/13H01M4/04H01M10/44H01M10/052
CPCY02E60/10H01M10/052H01M10/0567H01M10/0568H01M4/0447H01M4/382H01M4/1395H01M4/134H01M4/525H01M4/5825H01M4/485H01M4/505H01M2300/0068H01M4/366H01M4/62H01M2300/0025H01M4/13H01M10/446H01M4/0404H01M4/139H01M10/0565H01M10/44
Inventor 严仁晟权要翰朴恩囧李在宪张民哲孙炳国河性珉
Owner LG ENERGY SOLUTION LTD