Mixed aquo-lithium ion battery

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

Active Publication Date: 2007-07-25
北京恩力动力技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 cathode material is spinel-type LiMn for commercial lithium-ion batteries 2 o 4 . Positive electrode composition according to LiMn 2 o 4 : carbon black: binder = 80: 10: 10 weight ratio mixed slurry, evenly coated on the nickel mesh current collector, dried and pressed to form an electrode. Commercial activated carbon is used as the negative electrode material, and the slurry is mixed according to the ratio of activated carbon: conductive agent: binder = 85:5:10, and then evenly coated on the nickel mesh collector, dried and pressed to form an electrode. In this embodiment, the actual capacity of the positive electrode material is 80mAh / g, the negative electrode is 40mAh / g, and the single-side coating amount of the positive electrode is 5mg / cm 2 , the negative pole is 10mh / cm 2 . Then the two electrodes are cut according to the specifications, paired and assembled into a 2# battery (diameter is 14mm * The height is 50mm), the diaphragm used is the diaphragm o...

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 reach 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

A hybrid aqueous battery / supercapacitor electrical storage device, wherein a double layer capacitance is integrated with an intercalated mechanism to form a hybrid system. The lithium-ion intercalated compounds are used as positive electrode material. Activated carbon, mesoporous carbon and carbon and carbon nanotubes, etc. are used as negative electrode material. A lithium-ion containing aqueous solution is used as electrolyte.

Description

technical field [0001] The invention belongs to the technical field of batteries and capacitors, and in particular relates to a novel high-performance hybrid water-based 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 Es" of the trinity of economic growth, environmental protection and energy supply. Now the world's annual energy consumption converted into oil is about 8 billion tons, of which 90% are fossil fuels. According to the current consumption rate, it will be exhausted 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. The development of electric vehicles i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/36H01M4/48H01M4/58H01M10/24H01G9/145H01G11/06H01G11/62H01M4/50H01M4/52
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 北京恩力动力技术有限公司
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