Energy storage battery and production method thereof

An energy storage battery and electrolyte technology, which is applied in the manufacture of electrolyte batteries, secondary batteries, battery electrodes, etc., can solve the problems of serious self-discharge, unevenness, high price, etc., to improve specific energy, increase specific energy, and improve safety effect

Inactive Publication Date: 2018-05-29
ZHEJIANG FOREVER NEW ENERGY TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the polysulfides produced during the charging and discharging process of lithium-sulfur batteries can diffuse to the surface of metal lithium and react with it, making it more serious in self-discharge, and also causing irreversible loss of active material sulfur, and making the surface of metal lithium rough. uneven current distribution
[0005] He Ping (CN105261792A) proposed to use lithium-rich manganese-rich positive electrode and nano-Si negative electrode to assemble the battery. Although nano-Si negative electrode can effectively avoid the adverse effects brought by graphite negative electrode and reduce the volume change during charge and discharge, the preparation of nano-Si material The process is complicated and expensive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The present invention provides an energy storage battery. The energy storage battery includes a positive electrode, a negative electrode, an electrolyte and a separator, the electrolyte is filled between the positive electrode and the negative electrode, and the separator is located between the positive electrode and the negative electrode. The positive electrode uses an active compound containing lithium as the positive electrode active material, and the negative electrode uses sulfur element as the negative electrode active material.

[0048] In a preferred embodiment, the positive electrode uses a high-voltage lithium-ion battery positive electrode material as the positive electrode active material, and the negative electrode uses a lithium-sulfur battery positive electrode material as the negative electrode active material.

[0049] The positive active material is LiCoO 2 、LiNi x co y mn z o 2 、xLi 2 MnO 3 ·(1-x)LiMO 2 , LiMn 2 o 4 、LiNi 0.5 mn 1.5 o 4 、...

Embodiment 2

[0058] The preparation method of the energy storage battery of the present invention comprises:

[0059] Positive electrode preparation: Dissolve polyvinylidene fluoride in an appropriate amount of N-methylpyrrolidone to form a uniform solution; then add positive electrode active material LiNi to the uniform solution 0.5 mn 1.5 o 4 , conductive agent acetylene black and dispersant polyaniline, stir until uniform slurry, then apply the slurry on the aluminum foil, and dry to obtain the positive electrode of the battery; wherein LiNi 0.5 mn 1.5 o 4 The mass ratio of acetylene black, polyvinylidene fluoride and polyaniline is 8:1:0.6:0.4, and the thickness of the slurry coated on the aluminum foil is 95 μm. It should be noted that, in this embodiment, the positive electrode active material adopts LiNi 0.5 mn 1.5 o 4 , in other embodiments, the positive electrode active material can also be LiCoO 2 、LiNi x co y mn z o 2 、xLi 2 MnO 3 ·(1-x)LiMO 2 , LiMn 2 o 4 、LiMP...

Embodiment 3

[0065] The preparation method of the energy storage battery of the present invention comprises:

[0066] Positive electrode preparation: Dissolve polyvinylidene fluoride in an appropriate amount of N-methylpyrrolidone to form a uniform solution; then add positive electrode active material LiNi to the uniform solution 0.5 mn 1.5 o 4 , conductive agent acetylene black and dispersant polyaniline, stir until uniform slurry, then apply the slurry on the aluminum foil, and dry to obtain the positive electrode of the battery; wherein LiNi 0.5 mn 1.5 o 4 The mass ratio of acetylene black, polyvinylidene fluoride and polyaniline is 9.8:2:1:1, and the thickness of the slurry coated on the aluminum foil is 200 μm. It should be noted that, in this embodiment, the positive electrode active material adopts LiNi 0.5 mn 1.5 o 4 , in other embodiments, the positive electrode active material can also be LiCoO 2 、LiNi x co y mn z o 2 、xLi 2 MnO 3 ·(1-x)LiMO 2 , LiMn 2 o 4 、LiMPO...

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Abstract

The invention provides an energy storage battery and a production method thereof. The energy storage battery comprises a positive pole, a negative pole, electrolyte and a diaphragm; the electrolyte fills spacing between the positive pole and the negative pole; the diaphragm is arranged between the positive pole and the negative pole; the positive pole includes a lithium-bearing active compound asa positive active material; the negative pole includes sulfur as a negative active material. The energy storage battery and the production method thereof have the advantages that battery safety can beimproved and battery specific energy can be greatly increased.

Description

technical field [0001] The invention relates to the field of batteries, in particular to an energy storage battery and a preparation method thereof. Background technique [0002] With the gradual depletion of oil resources and the environmental pollution caused by vehicle exhaust emissions, new energy vehicles have become the main development direction of future vehicles and become a research hotspot in the industry. As the core component of new energy vehicles, energy storage batteries have received more and more attention. In order to better meet the needs of users and solve the problem of mileage anxiety, it is inevitable to develop batteries with higher specific energy to extend the cruising range of vehicles. [0003] At present, the main energy storage batteries used in new energy vehicles are lithium-ion batteries, of which graphite is widely used as the negative electrode material, but graphite is expensive, the discharge specific capacity is only 372mAh / g, and its ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0525H01M4/13H01M4/38H01M4/139H01M10/058
CPCH01M4/13H01M4/139H01M4/38H01M10/0525H01M10/058Y02E60/10Y02P70/50
Inventor 张芳芳赵亚刘桐桐杨冬生翟博刘俊军
Owner ZHEJIANG FOREVER NEW ENERGY TECH CO LTD
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