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Chemical power supply

A technology of chemical power supply and electrolyte, which is applied to electrochemical generators, circuits, capacitors, etc., can solve the problems of increasing the potential range of chemical power supply and increasing internal resistance, and achieve good cycle performance, long cycle life, and high Effects on safety and cycle performance

Inactive Publication Date: 2012-12-26
SHANGHAI AOWEI TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to propose a chemical power source mixed with a lithium titanate-based lithium-ion battery and a supercapacitor. The chemical power source has higher power density and better life performance, and simultaneously solves the problem of flatulence and The problem of increasing internal resistance and increasing the potential range of the chemical power supply

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Positive electrode: 100 parts of lithium iron phosphate, 0 parts of activated carbon.

[0037] Negative electrode: Lithium titanate was not pretreated.

[0038] Negative and positive capacity ratio: 1.05.

Embodiment 2

[0040] Positive electrode: 100 parts of lithium iron phosphate, 0 parts of activated carbon.

[0041] Negative electrode: Lithium titanate is pretreated so that the state of charge of lithium titanate is 30% SOC.

[0042] Negative and positive capacity ratio: 1.8.

Embodiment 3

[0044] Positive electrode: 100 parts of lithium iron phosphate, 0 parts of activated carbon.

[0045] Negative electrode: Lithium titanate is pretreated so that the state of charge of lithium titanate is 30% SOC.

[0046] Negative to positive capacity ratio: 2.2.

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Abstract

The invention provides a chemical power supply. The chemical power supply comprises an anode, a cathode, an isolation film and electrolyte, and is characterized by being formed by mixing a lithium ion battery and the inner part of a super capacitor, wherein the cathode is subjected to the pre-doping lithium process, so that the SOC (State of Charge) of the cathode is 30%. According to the chemical power supply, particularly the lithium titanate-based chemical power supply provided by the invention, not only is high-multiplying power charging and discharging performance good, also the cycle service life is long, the internal resistance can not be increased, and the gas expansion can be occur after the long-term use of the chemical power supply, the safety is high, and the circulation performance and the power performance are good, so that the chemical power supply has wide application field.

Description

technical field [0001] The invention relates to the field of chemical power sources, in particular to a lithium titanate-based lithium ion battery and a supercapacitor internal hybrid chemical power source. Background technique [0002] Lithium titanate (Li 4 Ti 5 o 12 ) is a new type of anode material for lithium-ion batteries, and its biggest feature is "zero strain". The so-called "zero strain" means that the crystal lattice constant and volume change are very small when inserting or extracting lithium ions. In the charge and discharge cycle, this "zero strain" can avoid the structural damage caused by the back and forth expansion and contraction of the electrode material, thereby improving the cycle life of the electrode, reducing the specific capacity fading caused by the cycle, and also has very good durability. Overcharge and overdischarge characteristics; so lithium titanate is also an excellent battery material. However, due to its low electrical conductivity a...

Claims

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Application Information

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IPC IPC(8): H01M4/131H01M10/0525H01G9/28
CPCY02E60/122Y02E60/13Y02E60/10
Inventor 曹小卫吴明霞黄廷立安仲勋杨恩东
Owner SHANGHAI AOWEI TECH DEV
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