Non-aqueous electrolyte secondary battery

A non-aqueous electrolyte, secondary battery technology, applied in non-aqueous electrolyte batteries, secondary batteries, secondary battery repair/maintenance, etc. problems such as poor performance, to achieve the effects of excellent operability, reliability, and excellent low-temperature discharge characteristics

Inactive Publication Date: 2018-03-13
杨昌恩
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Existing separators containing fillers have poor adhesion to electrodes due to the presence of fillers protruding from the surface, uneven inter-electrode resistance due to uneven distances between electrodes, and lithium dendrites (dendrites) are likely to occur. , and poor security

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A non-aqueous electrolyte secondary battery, comprising a positive pole, the positive pole adopts a mixture of iron disulfide and an additive compound to improve the pH value, the porosity of the positive pole is preferably not more than 50%, wherein the positive pole contains a binder, and the binder A copolymer of hexafluoropropylene and 1,1-vinylidene fluoride is selected;

[0020] Negative electrode, the negative electrode is composed of a material that can absorb and release lithium or lithium ions, the surface roughness of the above-mentioned negative electrode is below 0.6 mm, the negative electrode is porous, the porosity of the negative electrode is not more than 50%, and the negative electrode is selected from lithium halide. Lithium chloride is preferred in the present embodiment;

[0021] And non-aqueous electrolyte containing supporting electrolyte and phosphazene derivatives.

[0022] Wherein, the mixture of additive compounds for increasing the pH value ...

Embodiment 2

[0024] A non-aqueous electrolyte secondary battery, comprising a positive pole, the positive pole adopts a mixture of iron disulfide and an additive compound to improve the pH value, the porosity of the positive pole is preferably not more than 50%, wherein the positive pole contains a binder, and the binder A copolymer of hexafluoropropylene and 1,1-vinylidene fluoride is selected;

[0025] Negative electrode, the negative electrode is composed of a material that can absorb and release lithium or lithium ions, the surface roughness of the above-mentioned negative electrode is below 0.6 mm, the negative electrode is porous, the porosity of the negative electrode is not more than 50%, and the negative electrode is selected from lithium halide. Lithium chloride is preferred in the present embodiment;

[0026] And non-aqueous electrolyte containing supporting electrolyte and phosphazene derivatives.

[0027] Wherein, the mixture of additive compounds for increasing the pH value ...

Embodiment 3

[0029] A non-aqueous electrolyte secondary battery, comprising a positive pole, the positive pole adopts a mixture of iron disulfide and an additive compound to improve the pH value, the porosity of the positive pole is preferably not more than 50%, wherein the positive pole contains a binder, and the binder A copolymer of hexafluoropropylene and 1,1-vinylidene fluoride is selected;

[0030] Negative electrode, the negative electrode is composed of a material that can absorb and release lithium or lithium ions, the surface roughness of the above-mentioned negative electrode is below 0.6 mm, the negative electrode is porous, the porosity of the negative electrode is not more than 50%, and the negative electrode is selected from lithium halide. Lithium chloride is preferred in the present embodiment;

[0031] And non-aqueous electrolyte containing supporting electrolyte and phosphazene derivatives.

[0032] Wherein, the mixture of additive compounds for increasing the pH value ...

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Abstract

The invention relates to the technical field of a battery electrolyte, in particular to a non-aqueous electrolyte secondary battery. The non-aqueous electrolyte secondary battery comprises a positiveelectrode, a negative electrode and a non-aqueous electrolyte, wherein the positive electrode employs a mixture of iron disulfide and an additive compound for improving a pH value, the porosity of thepositive electrode is preferably not large than 50%, the negative electrode comprises a material capable of absorbing and releasing lithium or lithium ions, the surface roughness of the negative electrode is 0.6 millimeter or below, the negative electrode is porous, and the porosity of the negative electrode is not larger than 50%, and the non-aqueous electrolyte is used for supporting an electrolyte and a phosphonitrile derivative. The non-aqueous electrolyte secondary battery is excellent in low-temperature discharging characteristic, excellent in operability in production process on a large scale, high in reliability and excellent in discharging characteristic.

Description

technical field [0001] The invention relates to the technical field of battery electrolyte, in particular to a non-aqueous electrolyte secondary battery. Background technique [0002] Lithium battery electrolyte is the carrier of ion transmission in the battery. It is generally composed of lithium salt and organic solvent. Organic solvent (such as ethanol) or new ionic liquid (N-methylimidazole) is used as the electrolyte solution. [0003] Lithium-ion secondary batteries differ from metal lithium secondary batteries in that their positive and negative electrode materials use intercalation compounds that can reversibly intercalate and deintercalate lithium ions. These intercalation compounds have one-dimensional, two-dimensional or three-dimensional channels for lithium ion intercalation and deintercalation, and their own skeleton structures remain unchanged during lithium intercalation and deintercalation. At present, the positive electrode materials of practical lithium-i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/052H01M4/136H01M4/62H01M4/36H01M4/58H01M10/0566H01M10/42
CPCH01M4/136H01M4/362H01M4/5815H01M4/582H01M4/62H01M10/052H01M10/0566H01M10/4235Y02E60/10
Inventor 杨昌恩
Owner 杨昌恩
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