Battery

A battery and electrolyte technology, applied in the field of electrochemical energy storage, can solve the problems of high technical threshold, inability to meet simultaneously, and high price, and achieve the effects of clear work content, excellent cycle performance, and low production cost

Active Publication Date: 2013-05-15
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

Method used

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Examples

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Example Embodiment

[0087] Example 1

[0088] The embodiments in this category are divided into 4 embodiments, respectively illustrating that different lithium or sodium ion deintercalation compounds can be used as the positive electrode active material of the battery of the present invention, but the protection scope of the present invention is not limited to the scope of these embodiments. Examples 1-1, 1-2, 1-3 and 1-4 can prove the correctness of the principle of the present invention to those skilled in the art.

Example Embodiment

[0089] Example 1-1

[0090] Take LiMn 2 O 4 It is the positive electrode active material, according to the ratio of 90% positive active material: conductive carbon black 6%: binder SBR (styrene butadiene rubber latex) 2%: thickener CMC (sodium carboxymethyl cellulose) 2%, first CMC is mixed with a certain amount of water evenly, then the active material and conductive carbon black are added, stirred for 2 hours, and finally SBR is added and stirred for 10 minutes to obtain the positive electrode slurry. The positive electrode current collector is a graphite plate with a thickness of 1 mm. The positive electrode slurry is uniformly coated on the positive electrode current collector and dried at 120 degrees for 12 hours to form a positive electrode sheet. The negative electrode of the battery is a copper tin-plated foil, in which the thickness of the copper foil is 0.1mm, and the thickness of the tin-plated layer is 0.005mm-0.01mm. The electrolyte is an aqueous solution containing...

Example Embodiment

[0091] Example 1-2

[0092] The battery was manufactured in the same manner as in Example 1-1, except that LiFePO 4 Replace LiMn 2 O 4 As a positive electrode active material, different from Example 1-1, the battery cycle operation voltage range is 0.8-2V. The battery cycle performance test results are attached Figure 5 , 6 . Different from Example 1-1, this battery has a lower voltage plateau and a discharge plateau around 1.2V, but the cycle performance is even better, with almost no degradation in 100 weeks. Although LiFePO 4 Replace LiMn 2 O 4 This leads to a lower platform and thus lower energy density, but the battery has better cycle performance than the latter.

[0093] The same reason, with LiMnPO with olivine structure 4 Or materials with similar structures can replace the positive electrode active material in the present invention, and can also form the battery of the present invention, without departing from the spirit of the present invention.

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Abstract

The invention discloses a battery which comprises an anode, a cathode and an electrolyte, wherein the anode comprises an anode active material, the anode active material is capable of reversely separating out an embedded ion, the cathode comprises an inert material which does not participate in an electrochemical reaction, the electrolyte comprises at least one solvent which is capable of dissolving an electrolyte and enables the electrolyte to be ionized, and the electrolyte can be ionized into at least one cathode cation generating reducing-depositing and oxidizing-dissolving on the cathode. The battery is characterized in that the embedded ion can be reversely separated out from the cathode active material firstly, and the cathode cation generates a reducing-depositing charge process on the cathode. The battery disclosed by the invention is safe in operation, low in production cost, excellent in cycle performance and long in service life, and is suitable for being used as a large energy storage system in the field of energy storage and a substitute of a lead-acid battery.

Description

technical field [0001] The invention belongs to the field of electrochemical energy storage, and in particular relates to a rechargeable 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 m...

Claims

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Application Information

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IPC IPC(8): H01M10/36H01M4/36
CPCY02E60/12Y02E60/10
Inventor 陈璞
Owner POSITEC POWER TOOLS (SUZHOU) CO LTD
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