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Preparation method of lithium ion battery electrolyte solution

A technology of electrolyte solution and lithium-ion battery, which is applied in the manufacture of electrolyte batteries, electrolytes, non-aqueous electrolyte batteries, etc., can solve the problems of poor long-term cycle performance and low specific capacity, and achieve improved overall performance, reduced battery internal resistance, and good battery life. Effect of Overcharge Resistance

Inactive Publication Date: 2015-09-23
ZHANGJIAGANG SMARTGRID FANGHUA ELECTRICAL ENERGY STORAGE RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide a lithium-ion battery electrolyte solution and its preparation method to solve the problems of low specific capacity and poor long-term cycle performance of manganese-based positive electrode materials such as lithium manganate and lithium-rich manganese

Method used

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  • Preparation method of lithium ion battery electrolyte solution
  • Preparation method of lithium ion battery electrolyte solution

Examples

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Effect test

Embodiment 1

[0022] In a dry glove box filled with high purity argon (H 2 O2 6 , After removing water), weigh 1.0 mole; zinc salt Zn (BF 4 ) 2 (After removing water), weigh 1.0 mole; cationic salt type additive Mg(BF 4 ) 2 (After removing water), weigh 0.01 mole; cationic salt type additive NaClO 4 (After removing water), weigh 0.01 mole; cationic salt type additive KClO 4 (After removing water), weigh out 0.01 mole. Take 800 ml of the above mixed solvent, add the 800 ml of the mixed solvent according to the weighed amounts of various salts, stir and dissolve thoroughly, and then add the mixed solvent to make the volume to 1000 ml. That is, the lithium ion battery electrolyte solution of the present invention is obtained, which can be used in organic lithium ion batteries using lithium manganate or lithium-rich manganese-based materials as the positive electrode (the negative electrode is metal zinc or zinc intercalation / extraction materials).

Embodiment 2

[0024] In a dry glove box filled with high purity argon (H 2 O2 6 , After removing water), weigh 1.0 mole; sodium hexafluorophosphate (NaPF 6 , After removing water), weigh 1.0 mole; cationic salt type additive Mg (BF 4 ) 2 (After removing water), weigh 0.01 mole; cationic salt type additive Mn(ClO 4 ) 2 (After removing water), weigh 0.01 mole; cationic salt type additive KClO 4 (After removing water), weigh out 0.01 mole. Take 800 ml of the above mixed solvent, add the 800 ml of the mixed solvent according to the weighed amounts of various salts, stir and dissolve thoroughly, and then add the mixed solvent to make the volume to 1000 ml. That is, the lithium ion battery electrolyte solution of the present invention is obtained, which can be used in organic lithium ion batteries using lithium manganate or lithium-rich manganese-based materials as the positive electrode (the negative electrode is metal sodium or sodium insertion / extraction materials).

Embodiment 3

[0026] In a dry glove box filled with high purity argon (H 2 O2 6 , After removing water), weigh 1.0 mole; cationic salt type additive sodium hexafluorophosphate (NaPF 6 , After removing water), weigh 0.01 mole; cationic salt type additive Mg (BF 4 ) 2 (After removing water), weigh 0.01 mole; cationic salt type additive Mn(ClO 4 ) 2 (After removing water), weigh 0.01 mole; cationic salt type additive KClO 4 (After removing water), weigh out 0.01 mole. Take 800 ml of the above mixed solvent, add the 800 ml of the mixed solvent according to the weighed amounts of various salts, stir and dissolve thoroughly, and then add the mixed solvent to make the volume to 1000 ml. That is, the lithium ion battery electrolyte solution of the present invention is obtained, which can be used in an organic lithium ion battery using lithium manganate or lithium-rich manganese-based materials as the positive electrode (the negative electrode is metal lithium or lithium insertion / extraction materials)...

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Abstract

The invention discloses a lithium ion battery electrolyte solution and a preparation method thereof. The solvent of the lithium ion battery electrolyte can be water or an organic solvent, and contains lithium salt and an additive; the content of the additive accounts for 0.01% to 20% of the total weight of the electrolyte lithium salt; and the lithium ion battery electrolyte is particularly suitable for a water system or organic system lithium ion battery using a lithium manganese oxide or lithium-rich manganese based material as a cathode. The special electrolyte salt additive is introduced, so that comprehensive performance of the electrolyte is improved, the specific discharge capacity of the lithium ion battery using the lithium manganese oxide or lithium-rich manganese based material as the cathode is obviously increased, high coulombic efficiency and long cycle stability are maintained, and the internal resistance of the battery is reduced to a certain extent. Moreover, the lithium ion battery electrolyte can enable the lithium ion battery using the lithium manganese oxide or lithium-rich manganese based material as the cathode to be of good overcharging performance.

Description

Technical field [0001] The invention belongs to the field of electrochemical engineering and industrial devices, and belongs to the aspect of lithium ion battery electrolytes, and more specifically relates to a preparation method of lithium ion battery electrolyte solution, which is used for using lithium manganese oxide, lithium-rich manganese-based materials, etc. as positive electrodes Lithium Ion Battery. Background technique [0002] So far, small-capacity organic lithium-ion batteries have a good industrialization foundation. In recent years, safe and inexpensive water-based lithium-ion batteries have also received widespread attention. Most of the electrode materials for water-based lithium-ion batteries are based on the research of organic lithium-ion battery materials, combined with the characteristics of water-based electrolytes to introduce and improve. Among the many cathode materials for lithium-ion batteries, spinel LiMn 2 O 4 It has the ideal main body for lithiu...

Claims

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Application Information

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IPC IPC(8): H01M10/058H01M10/0567
CPCH01M10/0567H01M10/058H01M2300/00Y02E60/10Y02P70/50
Inventor 杨裕生文越华申亚举程杰潘君丽赵平曹高萍
Owner ZHANGJIAGANG SMARTGRID FANGHUA ELECTRICAL ENERGY STORAGE RES INST
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