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Mixed aquo-lithium ion battery

A lithium-ion battery and hybrid technology, applied in the direction of hybrid capacitors, hybrid capacitor electrodes, hybrid capacitor electrolytes, etc., can solve the problems of difficult to find electrode pair materials, poor cycle performance, poor cycle performance, etc., to achieve low cost and long cycle The effect of life and high power

Active Publication Date: 2005-09-28
ENPOWER ENERGY TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in aqueous solution, when the lithium ion intercalation and deintercalation process reaches a certain potential, hydrogen evolution and oxygen evolution reactions will occur. It is difficult to find electrode pair materials that only undergo lithium ion intercalation and deintercalation without hydrogen evolution and oxygen evolution.
Moreover, the cycle performance of the negative electrode material mentioned in the patent is poor, that is, the cycle performance of the aqueous lithium-ion battery is very poor, and often cannot exceed dozens of cycles.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0021] The positive electrode material adopts spinel type LiMn for commercial lithium-ion batteries 2 O 4 . The composition of the positive electrode is based on LiMn 2 O 4 : carbon black: binder=80:10:10 weight ratio mixed slurry, uniformly coated on the nickel mesh current collector, dried and pressed into electrodes. The negative electrode material is commercial activated carbon, and the slurry ratio is mixed according to activated carbon: conductive agent: binder = 85:5:10, and then evenly coated on the nickel mesh current collector, dried and pressed into electrodes. In this example, the actual capacity of the positive electrode material is 80 mAh / g, the negative electrode is 40 mAh / g, and the single-sided coating amount of the positive electrode is 5 mg / cm 2 , the negative electrode is 10mg / cm 2 . Then, the two electrodes were cut according to the specifications, and assembled into a 2# battery (diameter 14mm * height 50mm), the separator used was that of a commerc...

Embodiment 2

[0023]The cathode material is LiCoO for commercial lithium-ion batteries 2 , and the rest are the same as in Example 1, and the steps and conditions in Example 1 are followed for slurry mixing, electrode coating and battery preparation. The actual capacity of the positive electrode material is 120mAh / g, the negative electrode is 40mAh / g, and the single-side coating amount of the positive electrode is 3.4mg / cm 2 , negative electrode 10mg / cm 2 . In the 0V-1.8V working range, the discharge current is 2C, the capacity is 250mAh, the average working voltage is 1.2V, and the 10C charge and discharge capacity is maintained at 240mAh. After 10,000 cycles, the capacity retention rate can be 87% (see Table 1 for details) .

Embodiment 3

[0025] The cathode material is LiCo for commercial lithium-ion batteries. 1 / 3 Ni 1 / 3 mn 1 / 3 o 2 , and the rest are the same as in Example 1, and the steps and conditions in Example 1 are followed for slurry mixing, electrode coating and battery preparation. The actual capacity of the positive electrode material is 100mAh / g, the negative electrode is 40mAh / g, and the single-side coating amount of the positive electrode is 4mg / cm 2 , negative electrode 10mg / cm 2 . In the 0V-1.8V working range, the discharge current is 1C, the capacity is 230mAh, the average working voltage is 1.0V, and the 10C charge and discharge capacity is maintained at 210mAh. After 10,000 cycles, the capacity retention rate can reach 92% (see Table 1 for details) .

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Abstract

The present invention relates to a new-type high-performance mixed aquo system lithium ion cell. Said invention is characterized by that its positive electrode is made of intercalation compound electrode material containing lithium ion, and its negative electrode is made of the electrode materials of active carbon, mesopore carbon or carbon nano tube, etc, with high specific surface, and its electrolyte adopts aquo system electrolyte containing lithium ion. Said invention has longer circulation life, it is more than ten times that of general secondary cell, and has the features of high power, safety, low cost and free from environmental pollution.

Description

technical field [0001] The invention belongs to the technical field of batteries and capacitors, and in particular relates to a novel high-performance mixed-type aqueous lithium-ion battery. Background technique [0002] With the continuous development of the economy, it will inevitably lead to the depletion of natural resources such as oil and coal, environmental pollution and the aggravation of the global greenhouse effect. Human beings must grasp the balance between the three-in-one "three Es" of economic growth, environmental protection and energy supply. The world's annual energy consumption is now about 8 billion tons of oil, of which 90% are fossil fuels. At the current rate of consumption, it will be depleted in about 100 to 200 years. The comprehensive and efficient development and utilization of new energy, energy-saving technology and environmental protection technology has become a very urgent topic. It is imperative to develop electric vehicles. Countries aro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/145H01G11/06H01G11/62H01M4/48H01M4/50H01M4/52H01M10/24H01M10/36
CPCH01M10/36H01M4/625B82Y30/00H01M4/48H01M12/005H01G11/58Y02E60/13H01G11/62H01G9/038H01M4/50H01G11/06H01M4/52H01G9/145H01G9/155H01M4/621Y02E60/128Y02E60/10H01G11/50H01G11/46H01G11/28H01G11/34
Inventor 夏永姚王永刚
Owner ENPOWER ENERGY TECH CO LTD
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