Electrolyte for lithium secondary battery and lithium secondary battery comprising same
A lithium secondary battery and electrolyte technology, applied in secondary batteries, secondary battery repair/maintenance, lithium batteries, etc., can solve the problem of accelerating the side reaction between the electrolyte and the electrode, increasing the thickness of the electrode and the internal resistance of the battery, etc. question
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[0136] Comparative example 2 and comparative example 3
[0137] In addition to adding the compounds represented by chemical formula 6 (Comparative Example 2) and chemical formula 7 (Comparative Example 3) in an amount of 1% by weight based on the total weight of electrolyte, the lithium secondary battery sample was manufactured by the same method as comparative example 1.
[0138] [chemical formula 6]
[0139]
[0140] [chemical formula 7]
[0141]
Example
[0142] Examples 1 to 4
[0143]In addition to adding a compound represented by chemical formula 8 (embodiment 1), chemical formula 9 (embodiment 2), chemical formula 10 (embodiment 3) or chemical formula 11 (embodiment 4) in an amount of 1% by weight based on the total weight of electrolyte, a lithium secondary cell sample was manufactured by the same method as comparative example 1.
[0144] [chemical formula 8]
[0145]
[0146] [chemical formula 9]
[0147]
[0148] [chemical formula 10]
[0149]
[0150] [chemical formula 11]
[0151]
Example
[0152] Examples 5 to 8
[0153] In addition to adding the compound represented by chemical formula 8 in the amount of 0.5 wt% (embodiment 5), 0.4 wt% (embodiment 6), 3 wt% (embodiment 7) and 4 wt% (embodiment 8) based on the total weight of electrolyte, the lithium secondary battery sample was manufactured by the same method as comparative example 1.
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