Lg Energy Solution, Ltd.

Lg Chem, Ltd

Sa Rah Kim

Dong Hui Kim

Kwang Ho Yoo

Dong Jun Lee

Sung Soo Yoon

Jeong Ae Yoon

Su Jeong Kim

Ji Yeon Kim

Hyun Woo Park

Kyung Oh Kim

Su Hee Lee

A method of preparing a secondary battery including pre-lithiating an electrode assembly including an electrode structure including a plurality of electrodes and a plurality of separators, and a metal substrate. The plurality of electrodes and the plurality of separators are alternatingly stacked. The pre-lithiating includes supplying lithium ions from one of the plurality of positive electrodes to one of the plurality of negative electrodes up to a state of charge (SOC) of A % by electrically connecting one of the plurality of positive electrodes and one of the plurality of negative electrodes and applying a first current, supplying lithium ions from the metal substrate to the positive electrodes up to B % of capacity of the positive electrodes by electrically connecting the metal substrate and the positive electrodes and applying a second current, after applying the first current, and resting the electrode assembly, after applying the second current.

Method of preparing secondary battery

A method of preparing a secondary battery which includes pre-lithiating an electrode assembly which includes an electrode structure including a plurality of electrodes and a plurality of separators, and a metal substrate. The plurality of electrodes and the plurality of separators are alternatingly stacked. The metal substrate is present on an outermost surface of the electrode structure in a direction in which the electrode and the separator are stacked. Each positive electrode and negative electrode are spaced apart from each other with one separator of the plurality of separators disposed therebetween. The pre-lithiating includes applying a first current by electrically connecting one of the plurality of positive electrodes and one of the plurality of negative electrodes, and applying a second current by electrically connecting the metal substrate and one of the plurality of positive electrodes, after applying the first current.

The present application relates to a gel polymer electrolyte, a method for producing a gel polymer electrolyte, and an electrochromic device comprising the same. As the gel polymer electrolyte comprises a block copolymer, the present application can simultaneously satisfy high ionic conductivity, low turbidity and adhesiveness.

Gel polymer electrolyte, electrochromic device comprising the same and production method thereof

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Daejeon, South Korea

Sa Rah Kim