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Battery

A battery and electrolyte technology, applied in the field of electrochemical energy storage, can solve the problems of restricting the development of batteries, unable to meet the requirements at the same time, and high technical threshold, and achieve the effects of shortening the migration distance, solving the problem of diffusion resistance and operating safety.

Active Publication Date: 2016-03-30
POSITEC POWER TOOLS (SUZHOU) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But no matter what kind of battery, it is impossible to meet the requirements of cheapness, reliability, safety and long life at the same time
Traditional lithium-ion batteries are too expensive and have potential safety hazards; high-temperature sodium-sulfur battery manufacturing technology threshold is high, and the price is expensive; many technical bottlenecks of vanadium redox flow batteries have not yet been broken through, etc.
[0003] For this reason, many researchers are committed to the research of aqueous lithium-ion batteries, hoping to greatly reduce the cost of lithium-ion batteries and improve safety, and some LiMn-based lithium-ion batteries have been proposed. 2 o 4 As the positive electrode, vanadium oxides such as LiV 3 o 8 etc. are negative electrodes and water is the electrolyte, but the poor stability of such negative electrodes in charging and discharging in water and the certain toxicity of vanadium limit the development of such batteries.
So far, the structures of the proposed aqueous lithium-ion secondary batteries have not been able to get rid of the structure based on the lithium ion extraction-intercalation principle, such as the reported VO 2 / LiMn 2 o 4 , LiV 3 o 8 / LiNi 0.81 co 0.19 o 2 , TiP 2 o 7 / LiMn 2 o 4 , LiTi 2 (PO 4 ) 3 / LiMn 2 o 4 , LiV 3 o 8 / LiCoO 2 Wait

Method used

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no. 2 approach

[0112] Please refer to Figure 4 As shown, the second embodiment of the present invention provides a battery, and the difference from the battery disclosed in the first embodiment is that in the second embodiment, the negative electrode 20 also includes a negative electrode active material 24 formed on the surface of the negative electrode current collector 22, The negative electrode active material 24 can be oxidized-dissolved into active ions 28 during the discharge process.

[0113] The negative electrode collector 22 is only used as a carrier for electron conduction and collection, and does not participate in the reaction of the negative electrode 20. The negative electrode active material 24 is formed on the negative electrode collector 22 by coating, electroplating or sputtering. The sputtering method includes but is not limited to magnetron sputtering. Specifically, the negative electrode current collector 22 is copper foil, the negative electrode active material 24 is...

no. 3 approach

[0144] The third embodiment of the present invention also discloses a battery. The difference from the battery disclosed in the second embodiment is that in the third embodiment, the negative electrode 20 only includes the negative electrode current collector 22, but the negative electrode current collector 22 not only conducts and collects electrons At the same time, it is also equivalent to that the negative active material can participate in the reaction of the negative electrode 20, and can be oxidized and dissolved into the active ion 28 during the battery discharge process, that is, the material of the negative electrode current collector 22 is the same as the elemental material of the active ion 28, for example: active ion 28 is zinc ion, and the corresponding negative electrode current collector 22 is metallic zinc.

[0145] In the third embodiment, the negative electrode 20 includes the negative electrode current collector 22 participating in the electrochemical reacti...

Embodiment 1-1

[0152] Use stainless steel as the working electrode, the stainless steel type is 304, the zinc electrode is the counter electrode and the reference electrode, in the sulfate electrolyte 2mol / LZnSO 4 and 2mol / LLi 2 SO 4 The electrochemical behavior of stainless steel was studied by cyclic voltammetry in the voltage range of 1.0-2.4V. Stainless steel is not passivated.

[0153] Figure 5 It is the cyclic voltammetry curve of the stainless steel 304 without passivation treatment in embodiment 1-1. It can be seen from the figure that a broad oxidation peak appeared at 1.9V (Vs.Zn) during the first anodic scan of stainless steel, followed by an obvious O 2 The precipitation peak is accompanied by the increase of current. In the subsequent cathodic scan, a relatively small reduction peak appeared at 1.4 V. The oxidation peak at 1.9V after 1 cycle was hindered, which means that an oxide layer was formed on the stainless steel surface in the first cycle, and the oxide layer inhi...

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Abstract

The invention discloses a battery. The battery comprises an anode, a cathode and an electrolyte solution. The anode comprises an anode current collector and an anode active material which undergoes an electrochemical reaction and can realize reversible release of an embedded ion. The cathode at least comprises a cathode current collector. The electrolyte solution comprises at least one solvent which can dissolve electrolytes and ionize the electrolytes, and the electrolytes can be ionized into at least one type of active ions which can undergo a reduction-deposition reaction and an oxidation-dissolution reaction at the cathode in a charge-discharge process. A porous layer or a graphene layer is formed on the surface of the cathode and the porous layer has micron scale, submicron scale or nanoscale apertures. The battery can be operated safely, has a low production cost, a long service life and good cycling performances, and can be used as a substitute of an energy storage system and a lead acid battery in the field of large-scale energy storage.

Description

technical field [0001] The invention belongs to the field of electrochemical energy storage, and in particular relates to a battery. Background technique [0002] The widespread use of new energy by human beings has led to the rapid expansion of the secondary battery market. In the current new energy system, the requirements for secondary batteries are ubiquitous. Whether it is electric vehicles, wind energy, solar grid connection or grid peak shaving, there is an urgent need for a cheap, reliable, safe and long-life secondary battery. The secondary batteries currently developed are mainly concentrated in lithium-ion batteries, high-temperature sodium-sulfur batteries, sodium-nickel-chloride batteries and vanadium flow batteries. These batteries have their own advantages, such as long life and high energy density of lithium-ion batteries and high-temperature sodium-sulfur batteries, and vanadium redox flow batteries have theoretically unlimited life. But no matter what ki...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/62H01M4/02H01M10/36
CPCY02E60/10
Inventor 陈璞王静
Owner POSITEC POWER TOOLS (SUZHOU) CO LTD
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