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LiNi0.5Mn1.5O4/lithium titanate battery and preparation method thereof

A lithium titanate battery, lithium nickel manganese oxide technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of easy formation of lithium dendrites, battery short circuit, low carbon material platform, etc., to improve comprehensive performance, The effect of improving energy density and good safety performance

Active Publication Date: 2014-03-26
SHANDONG GOLDENCELL ELECTRONICS TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are still some disadvantages in commercial graphite negative lithium-ion batteries, such as lithium dendrites are easy to form during overcharging, causing short circuit of the battery and affecting the safety performance of the battery; SEI film is easy to form, resulting in low initial charge and discharge efficiency and large irreversible capacity; The material platform is low, which can easily cause the electrolyte to decompose, causing safety hazards, etc.
Lithium titanate is a zero-strain material with high potential, which is not easy to produce lithium branch crystals, has better safety performance, and has stronger fast charging and low-temperature charging capabilities. However, due to its high potential, lithium iron phosphate, ternary, lithium manganate, etc. The nominal voltage of the positive electrode system battery is low, only 2.0V~2.5V, and the energy density of the corresponding battery is low

Method used

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  • LiNi0.5Mn1.5O4/lithium titanate battery and preparation method thereof
  • LiNi0.5Mn1.5O4/lithium titanate battery and preparation method thereof

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Embodiment Construction

[0030] Below with regard to specific embodiment, the present invention will be further described:

[0031] A lithium nickel manganese oxide / lithium titanate battery, comprising a positive electrode sheet, a negative electrode sheet, and an electrolyte, the positive electrode sheet comprising a positive electrode aluminum foil current collector and a positive electrode slurry coating coated on its surface, the negative electrode sheet comprising a negative electrode The aluminum foil current collector and the negative electrode slurry coating coated on the surface are characterized in that,

[0032] Positive and negative slurry coatings include the following materials:

[0033] The mass ratio of positive electrode slurry is based on lithium nickel manganese oxide (LiNi 0.5 mn 1.5 o 4 ): conductive carbon Super-p: conductive carbon KS-15: binder PVDF (polyvinylidene fluoride) = 95:1:1:3, solvent is NMP (N-methylpyrrolidone), positive solid content 60%~ 65%;

[0034] The mas...

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Abstract

The invention discloses a LiNi0.5Mn1.5O4 / lithium titanate battery and a preparation method thereof, and the battery has not only relatively high energy density but also favorable cycle performance, safety performance and quick charging and low-temperature charging capabilities. The technical scheme is that the mass ratio of anode slurry is that LiNi0.5Mn1.5O4: conductive carbon Super-p: conductive carbon KS-15: binder PVDF=95:1:1:3, and the solvent is NMP; the mass ratio of cathode slurry is (Li4Ti5O12): conductive carbon Super-p: conductive carbon KS-15: binder PVDF=91:3:2:4, and the solvent os NMP. The invention has the advantages that as lithium titanate which is a zero-strain material and has low probability of generating lithium dendrites serves as the cathode active substance of the battery, the battery has better safety performance, rate performance, low-temperature performance and cycle performance.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and relates to a preparation method of a lithium nickel manganese oxide / lithium titanate battery. Background technique [0002] At present, with the advancement of science and technology and the continuous improvement of human demand for new energy, the performance of lithium-ion batteries is also improving, especially now that new energy vehicles have higher requirements for lithium-ion batteries. To solve its safety problems, it also needs to improve its low temperature and fast charging capabilities. There are still some disadvantages in commercial graphite negative lithium-ion batteries, such as lithium dendrites are easy to form during overcharging, causing short circuit of the battery and affecting the safety performance of the battery; SEI film is easy to form, resulting in low initial charge and discharge efficiency and large irreversible capacity; The material platform is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/505H01M4/525H01M10/0567
CPCY02E60/122H01M4/485H01M4/505H01M4/525H01M10/0525H01M10/0567Y02E60/10
Inventor 关成善宗继月张敬捧王勇郭章飞殷昊曦
Owner SHANDONG GOLDENCELL ELECTRONICS TECH
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