Method for electrodepositing lithium-copper alloy in ionic liquid system

An ionic liquid and electrodeposition technology, which is applied in the field of electrodeposition of lithium-copper alloys, can solve the problems of high energy consumption and difficult control of lithium element content, and achieve the effects of low energy consumption, good solubility, and simple process

Inactive Publication Date: 2010-09-15
HARBIN INST OF TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the content of lithium element in the lithium-copper alloy prepared by the existing smelting method is difficult to control and the energy consumption is large. The present invention provides a method for electrodepositing lithium-copper alloy in an ionic liquid system

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  • Method for electrodepositing lithium-copper alloy in ionic liquid system
  • Method for electrodepositing lithium-copper alloy in ionic liquid system

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specific Embodiment approach 1

[0016] Specific embodiment one: the method for electrodepositing lithium-copper alloy in the ionic liquid system of the present embodiment is realized through the following steps: 1. LiBF 4 , Cu(BF 4 ) 2 Add ionic liquid 1-butyl 3-methylimidazolium tetrafluoroborate (BMIMBF 4 ), stirring and dissolving the electrolyte, in which LiBF 4 The concentration is 40~160g / L, Cu(BF 4 ) 2 The concentration is 100-200g / L, and the additive accounts for 0.5%-2% of the total mass of the electrolyte, and the additive is butynediol; 2. After the cathode material is subjected to electrodeposition pretreatment, the cathode material and the anode material are At the same time, immerse in the electrolyte, and conduct electrodeposition for 10-120 minutes in a constant current mode, that is, lithium-copper alloy is obtained on the surface of the cathode material; wherein, in step 2, the current density is controlled to be 5-10A / m 2 , the cathode material is copper, nickel, titanium or stainless...

specific Embodiment approach 2

[0022] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the LiBF in step 1 4 The concentration is 80~120g / L. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0023] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the LiBF in step 1 4 The concentration is 100g / L. Other steps and parameters are the same as those in Embodiment 1.

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Abstract

The invention discloses a method for electrodepositing a lithium-copper alloy in an ionic liquid system, which relates to a method for electrodepositing the lithium-copper alloy. The method solves the problems that the conventional smelting method for preparing the lithium-copper alloy cannot control the lithium element content easily and has high energy consumption. The method comprises the following: step one, adding LiBF4, Cu(BF4)2 and an additive into BMIMBF4 in turn to prepare an electrolyte; and step two, immerging an anode material and a cathode material into the electrolyte, and adopting a constant current mode and controlling the current density and the electrodepositing time to realize the preparation of the lithium-copper alloy, wherein the two steps are performed in a glove box. The method has the advantages of concise process, simple equipment and low energy consumption; the metal lithium content in the lithium-copper alloy is adjusted and controlled by adjusting components and electrodepositing technological parameters of the electrolyte; the metal lithium content is controllable; and the atomic mass percent content is 7 to 40 percent. Simultaneously, the method realizes co-deposition of lithium and copper which have large electrode potential differences; and the obtained lithium-copper alloy can be used as a cathode material for a lithium ion battery.

Description

technical field [0001] The invention relates to a method for electrodepositing lithium copper alloy. Background technique [0002] At present, research on lithium-copper alloys is mainly used in two major fields. One is lithium-copper alloys with high lithium content, which mainly utilizes the shielding effect of lithium on neutrons and is used as shielding materials for nuclear reactors. The other is to add trace amounts of Lithium-copper alloys of lithium are mainly used as high-conductivity, high-strength, high-wear-resistant alloys. Japan, the United States, and the Soviet Union are all studying lithium-copper alloys, in which the mass fraction of lithium is between 0.01% and 1.3%. head material etc. It has been reported that lithium-copper alloys can be well applied in fusion reactors; after adding a small amount of lithium and other elements to copper-based superconducting alloys, materials with better superconducting properties and superior processing properties can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/56
Inventor 杨培霞安茂忠杨开健
Owner HARBIN INST OF TECH
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