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Ferrotitanium battery

A battery and ferro-titanium technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve problems such as unsatisfactory cycle performance and poor safety, and achieve excellent cycle performance, low cost, and excellent performance

Inactive Publication Date: 2010-12-08
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a titanium-iron battery in order to overcome the disadvantages of poor safety and unsatisfactory cycle performance of the current lithium-ion battery

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] In addition to the active material of the negative electrode is Li 4 Ti 5 o 12 1. The current collector of the negative electrode is aluminum foil, and other materials and processes are the same as in Comparative Example 1. After being assembled into a lithium-ion battery, the charge-discharge cycle is carried out between 1.0-2.4V at 1C at room temperature, and the average discharge voltage is 2.0V. After 2000 cycles, the capacity retention rate is 98.1%. Put the fully charged lithium-ion battery in an oven at 85°C, and there is no obvious expansion after 20 hours.

Embodiment 2

[0020] In addition to the active material of the negative electrode is Li 4 al 0.15 Ti 4.85 o 11 F, other materials and processes are the same as Comparative Example 2. After being assembled into a lithium-ion battery, the charge-discharge cycle is carried out between 1.0-2.4V at 1C at room temperature, and the average discharge voltage is 2.0V. After 2000 cycles, the capacity retention rate is 99.0%. Put the fully charged lithium-ion battery in an oven at 85°C, and there is no obvious expansion after 20 hours.

Embodiment 3

[0022] In addition to the active material of the negative electrode is carbon-coated Li 4 al 0.25 Ti 4.75 o 12 , The positive active material is 1wt% carbon-coated LiFePO 4 , The electrolyte is impregnated with 1mol / l LiPF 6 Except for the polyacrylonitrile of the EC / DEC / DMC (volume ratio 1:1:1) solution, other materials and processes were the same as in Comparative Example 2. After being assembled into a lithium-ion battery, the charge-discharge cycle is carried out between 1.0-2.4V at 1C at room temperature, and the average discharge voltage is 2.0V. After 2000 cycles, the capacity retention rate is 99.5%. Put the fully charged lithium-ion battery in an oven at 85°C, and there is no obvious expansion after 20 hours.

[0023] Through the comparison between the above comparative examples and the examples, it can be seen that the ferrotitanium battery of the present invention has very high safety performance, excellent cycle performance, and can prevent gas swelling and fi...

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PUM

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Abstract

The invention belongs to the technical field of batteries, and relates to a ferrotitanium battery. The cathode of the ferrotitanium battery contains a Li-Ti-O active material with a spinel structure, while the anode contains a Li-Fe-P-O active material with an olivine structure. The ferrotitanium battery has the advantages of high safety performance, excellent cycle performance, no gas bulging or explosion, environmental protection, no pollution, high operability, high reproducibility, stable quality and high reliability of the obtained product, and readily available raw material resources of electrode active materials.

Description

technical field [0001] The invention belongs to the field of battery technology, and relates to a titanium-iron battery. More specifically, the invention relates to a Li-Ti-O active material with a spinel structure in the negative electrode and Li-Fe-P-O with an olivine structure in the positive electrode. Active materials for titanium-iron batteries. Background technique [0002] As we all know, lithium-ion batteries have the characteristics of high energy density, high specific power, good cycle performance, no memory effect, and no pollution (Wu Yuping, Dai Xiaobing, Ma Junqi, Cheng Yujiang. "Lithium-ion Batteries-Application and Practice". Beijing : Chemical Industry Press, 2004; Wu Yuping, Zhang Hanping, Wu Feng, Li Zhaohui, "Polymer Lithium-ion Batteries", Beijing: Chemical Industry Press, 2007), so their development is very rapid. However, since lithium-ion batteries use graphite or other carbon materials as the negative electrode, lithium is easy to form dendrites d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/36H01M4/36H01M4/58H01M4/62C01G23/00C01B25/45H01M10/40
CPCY02E60/10
Inventor 张鹏杨黎春施轶吴宇平
Owner FUDAN UNIV
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