Aqueous alkali metal ion battery based on colloid or gel electrolyte and preparation method thereof

A technology of gel electrolyte and alkali metal ions, applied in secondary batteries, circuits, electrical components, etc., can solve problems such as difficult grid connection, corrosion, and low cycle life

Pending Publication Date: 2018-08-28
浙江浙能中科储能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Wind power and solar power are clean energy sources, but due to scattered distribution, difficulty in connecting to the grid, and inconsistency between power generation time and power consumption time, electric energy cannot be effectively stored and efficiently utilized
[0003] Aqueous alkali metal ion battery is an optional solution to this problem, Whitacre (document 1, Whitacre, J.F., et al., A Polyionic, Large-Format Energy Storage Device Using an Aqueous Electrolyte and Thick-Format Composite NaTi 2 (PO 4 ) 3 / Activated Carbon Negative Electrodes.Energy Technology,2015.3(1):p.20-31), Xia Yongyao (Document 2, Cao Yi, Xia Yongyao, etc. Current status and prospects of aqueous sodium-ion batteries[J]. Energy Storage Science and Technology, 2016, 5) and others are relatively leading researchers in this field at home and abroad, but the aqueous alkali metal ion batteries they are currently studying must use aqueous electrolytes. In aqueous solutions, when alkali metal ions intercalate and deintercalate When a certain potential is reached, hydrogen evolution and oxygen evolution reactions will occur, and further break the acid-base balance of the electrolyte, accelerate the corrosion of the battery current collector, and cause the battery capacity to decay quickly and the cycle life to be low

Method used

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  • Aqueous alkali metal ion battery based on colloid or gel electrolyte and preparation method thereof
  • Aqueous alkali metal ion battery based on colloid or gel electrolyte and preparation method thereof

Examples

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Effect test

Embodiment 1

[0036] Such as figure 1 , an aqueous alkali metal ion battery based on a colloidal or gel electrolyte, the positive electrode uses 94% by mass carbon-coated λ-MnO 2 and 6% graphite to make the positive electrode sheet; the negative electrode is made of 8% graphite by mass percentage, 1% acetylene black, and 91% carbon coating (TiO) 2 P 2 o 7 Negative electrode sheet is made; colloidal electrolyte is made by adopting 9% sodium sulfate, 19% fumed silicon dioxide, 0.3% polyethylene glycol, 0.4% sodium iminosuccinate and the rest ratio is water. From left to right, the positive electrode current collector, positive electrode material, fiber separator, negative electrode material, and negative electrode current collector are assembled in sequence, and the above colloidal electrolyte is filled, and the battery is completed through the gel process. Such as figure 2 As shown, at a current density of 1mA / cm 2 Under the following conditions, it is found that after one charge and d...

Embodiment 2

[0038] Such as figure 1 , an aqueous alkali metal ion battery based on a colloidal or gel electrolyte, the positive electrode uses 96% by mass carbon-coated Na 2 NiFe(CN) 6 and 4% acetylene black to make the positive electrode sheet; the negative electrode is made of 3% graphite, 7% acetylene black, and 90% carbon-coated NaTi 2 (PO 4 ) 3 Negative electrode sheet is made; colloidal electrolyte is made by adopting 9% sodium sulfate, 19% fumed silicon dioxide, 0.3% polyethylene glycol, 0.4% sodium iminosuccinate and the rest ratio is water. From left to right, the positive electrode current collector, positive electrode material, fiber separator, negative electrode material, and negative electrode current collector are assembled in sequence, and the above colloidal electrolyte is filled, and the battery is completed through the gel process.

Embodiment 3

[0040] Such as figure 1 , an aqueous alkali metal ion battery based on a colloidal or gel electrolyte, the positive electrode uses 94% by mass carbon-coated λ-MnO 2 and 6% graphite to make the positive electrode sheet; the negative electrode is made of 8% graphite by mass percentage, 1% acetylene black, and 91% carbon coating (TiO) 2 P 2 o 7 Make the negative pole piece; adopt 7% sodium sulfate, 0.6% glycerin, 0.1% sodium hydroxide, and the rest is polyacrylamide colloid with a solid content of 17% to make a colloidal electrolyte. From left to right, the positive electrode current collector, positive electrode material, fiber separator, negative electrode material, and negative electrode current collector are assembled in sequence, and the above colloidal electrolyte is filled, and the battery is completed through the gel process.

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Abstract

The invention relates to an aqueous alkali metal ion battery based on a colloid or gel electrolyte and a preparation method thereof. The aqueous alkali metal ion battery comprises the colloid or gel electrolyte, a positive electrode, a negative electrode, a diaphragm located between the positive electrode and the negative electrode, a positive current collector and a negative current collector respectively connected with the positive and negative electrodes, and a fluid-free medium. According to the invention, an aqueous electrolyte is replaced with the colloid or gel electrolyte, so the battery is easier to produce on the basis of the prior art and conventional processes, and has lower cost.

Description

technical field [0001] The invention relates to a water-based alkali metal ion battery based on a colloid or gel electrolyte and a preparation method thereof, which belongs to the field of secondary batteries and also belongs to the technical field of energy materials. Background technique [0002] With the rapid development of modern industry and economy and the extensive use of fossil energy, the environment continues to deteriorate, and at the same time, the problem of energy supply and demand has become increasingly prominent. Therefore, seeking cleaner and more efficient alternative energy sources is an urgent problem to be solved in the current society. Wind power and solar power are clean energy sources. However, due to scattered distribution, difficulty in grid connection, and inconsistency between power generation time and power consumption time, electric energy cannot be effectively stored and efficiently utilized. [0003] Aqueous alkali metal ion battery is an o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/36H01M10/38
CPCH01M10/36H01M10/38Y02E60/10Y02P70/50
Inventor 刘宇周标夏骥贺健张娜曾诗蒙贺诗阳
Owner 浙江浙能中科储能科技有限公司
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