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Rechargeable magnesium battery

A magnesium battery and electrolyte technology, which is applied in the manufacture of secondary batteries, non-aqueous electrolyte batteries, and electrolyte batteries, etc., can solve the problems of low theoretical capacity, limited application, complicated and complicated preparation process, etc., and achieve high discharge capacity and low price , the effect of rich raw materials

Inactive Publication Date: 2015-04-22
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its preparation process is cumbersome and complicated. Even using the molten salt method at a lower temperature, it takes 60 hours at 850 degrees Celsius to prepare the precursor Cu. 2 Mo 6 S 8 , the use of high-temperature solid-phase method is to reach 1100 degrees Celsius to synthesize Cu 2 Mo 6 S 8 , and then the copper element needs to be leached out to obtain the Chevrel phase compound Mo 6 S 8
Moreover, the Chevrel phase compound Mo 6 S 8 The theoretical capacity is relatively low, which limits its application in high energy density secondary batteries

Method used

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Embodiment 1

[0026] Grind anatase titanium dioxide finely, add 2 parts of acetylene black as conductive agent and 1 part of polyvinylidene fluoride binder to 7 parts of anatase titanium dioxide, stir evenly, coat on copper foil, put Dry in an oven at a temperature of 80°C, punch a pole piece with a punch with a diameter of 12mm, press it under a pressure of 1MPa, and dry it in a vacuum oven at a temperature of 100°C for 4 hours to obtain a positive pole piece, and then transfer In the argon glove box, with metal magnesium as the negative electrode, add 0.5mol / L Mg(BH 4 ) 2 +LiBH 4 / Tetraethylene glycol dimethyl ether ([LiBH 4 ]=1.5mol / L) electrolyte to make a rechargeable magnesium battery.

[0027] Brookite-type or rutile-type titanium dioxide may be used instead of anatase-type titanium dioxide. Titanium dioxide can also be doped with other metal elements, such as at least one of vanadium, chromium, manganese, iron, cobalt, zirconium, niobium, molybdenum, rhodium, indium, tin, alumin...

Embodiment 2

[0030] Monoclinic TiO 2 (B) Grind finely, in 7 parts of monoclinic TiO 2 (B) Add 2 parts of acetylene black as conductive agent, 1 part of polyvinylidene fluoride binder, stir evenly, coat on copper foil, put it in an oven at 80°C for drying, and use a 12mm diameter The punch is punched into a pole piece, and after being pressed under a pressure of 1MPa, it is placed in a vacuum oven at a temperature of 100°C and dried for 4 hours to obtain a positive pole piece, which is then transferred to an argon glove box, with metal magnesium as the negative pole, adding 0.5mol / L Mg(BH 4 ) 2 +LiBH 4 / Tetraethylene glycol dimethyl ether ([LiBH 4 ]=1.5mol / L) electrolyte to make a rechargeable magnesium battery.

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Abstract

The invention discloses a rechargeable magnesium battery. An anode material is titanium dioxide or element-doped titanium dioxide, a cathode material is metal magnesium or a magnesium alloy, and electrolyte is borohydride magnesium dissolved in organic ether. The invention also provides a preparation method of the rechargeable magnesium battery. The rechargeable magnesium battery has advantages of high discharging capacity and stability in circulation and is very good in application prospect as a green energy resource.

Description

technical field [0001] The invention relates to a rechargeable magnesium battery, which belongs to the field of batteries. Background technique [0002] With the depletion of non-renewable energy sources, the development of environmentally friendly and resource-rich new energy and renewable energy has become the consensus of all countries in the world. As an important part of renewable energy, chemical power sources have gradually become a research hotspot. Among them, lithium-ion batteries are widely used in various electronic products such as handheld devices and notebook computers, as well as hybrid vehicles and electric vehicles due to their advantages such as high voltage, high energy density, good cycle performance, small self-discharge, and no memory effect. However, lithium-ion batteries are difficult to guarantee the safety of large-capacity storage, so people are eager to develop a cheap, safe, environmentally friendly high-energy secondary battery to replace lith...

Claims

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Application Information

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IPC IPC(8): H01M10/054
CPCH01M10/054H01M10/058Y02E60/10
Inventor 努丽燕娜苏硕剑杜国栋杨军王久林
Owner SHANGHAI JIAO TONG UNIV
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