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Method for preparing metal lithium battery with ultra-high energy density

A technology of energy density and metal lithium, applied in the field of preparation of metal lithium batteries, can solve problems such as restricting the energy density of batteries, and achieve the effects of easy scale-up production, simple process, and ultra-high energy density

Inactive Publication Date: 2018-07-31
武汉理工力强能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Graphite is currently widely used as an anode material for lithium-ion batteries. Due to its theoretical capacity of only 372mAh / g, it restricts the energy density of the battery.

Method used

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  • Method for preparing metal lithium battery with ultra-high energy density
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Embodiment 1

[0024] Example 1, see Figure 1 to Figure 2 :

[0025] The invention provides a method for preparing a metal lithium battery with ultra-high energy density, comprising the following steps:

[0026] 1) The metal lithium powder is coated on the graphite negative electrode sheet by the coating method, and stored in an argon-protected glove box at 60°C for 2 hours, and the metal lithium powder coated with the metal lithium powder layer is coated with a punching machine / The graphite electrode sheet is punched into a disc with a diameter of 14mm; the vanadium pentoxide is ball-milled by ball milling method, and then the slurry containing vanadium pentoxide is evenly coated on the aluminum sheet current collector by a coating machine. Dry for 10 hours, and use a punching machine to punch the vanadium oxide positive electrode sheet into a disc with a diameter of 14 mm;

[0027] 2) Using Celgard polymer film as diaphragm material, organic solvent containing 1mol / L lithium hexafluoro...

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Abstract

The invention provides a method for preparing a metal lithium battery with ultra-high energy density. The preparation method comprises the following steps: preparing a metal lithium powder / graphite negative electrode slice surface-coated with a metal lithium powder layer and a vanadium pentoxide positive electrode slice; with a Celgard polymer film as a diaphragm material and an organic solvent containing lithium hexafluorophosphate as an electrolyte, assembling the metal lithium powder / graphite negative electrode slice and the vanadium pentoxide positive electrode slice in a glove box with argon protection so as to form a button type lithium battery, and carrying out standing and ageing; subjecting the aged lithium battery to initial discharging to a voltage of 1.5 V, wherein discharge current is 0.05 C; and charging the lithium battery having undergone initial discharging with a current of 0.1 C until the voltage is 4.0 V so as to obtain the metal lithium battery which can work normally. According to the invention, the lithium-free positive electrode material vanadium pentoxide is adopted, and the metal lithium powder is introduced into the graphite negative electrode slice, so the vanadium pentoxide-metal lithium / graphite battery with ultra-high energy density is formed; and the preparation method has the advantages of simple process, easy enlargement production and large-scale application potential.

Description

technical field [0001] The invention relates to the technical field of electrochemical material manufacturing, in particular to a method for preparing a metal lithium battery with ultra-high energy density. Background technique [0002] Lithium-ion batteries are popular as power sources for mobile devices due to their high energy density, light weight, and long life. In 1991, Sony Corporation commercialized lithium-ion batteries for the first time, which has since opened up a global research boom in lithium-ion battery materials. However, as far as the energy density of the lithium-ion battery itself is concerned, its capacity is closely related to the type of electrode material. The development of high-capacity electrode materials has always been one of the core tasks of lithium-ion battery workers around the world. The current lithium-ion battery market mainly uses lithium iron phosphate and ternary materials as positive electrodes, and graphite materials as negative ele...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/38H01M4/48H01M4/587H01M10/0525H01M10/058
CPCH01M4/366H01M4/382H01M4/483H01M4/587H01M10/0525H01M10/058Y02E60/10Y02P70/50
Inventor 吴黎明葛耀闻
Owner 武汉理工力强能源有限公司
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