Method for preparing porous germanium by utilizing electrodeposition of ionic liquid

An ionic liquid and electrodeposition technology, which is applied in electrode manufacturing, electrochemical treatment of electrodes, circuits, etc., can solve problems such as small volume expansion of voids, prevent shedding and loss, improve utilization rate, and improve charge and discharge performance.

Active Publication Date: 2015-07-01
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the problem that most of the germanium-based materials prepared by the existing methods are granular, and even if there are gaps between the particles, the gaps are generally small and disordered and cannot buffer the volume expansion of germa

Method used

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  • Method for preparing porous germanium by utilizing electrodeposition of ionic liquid
  • Method for preparing porous germanium by utilizing electrodeposition of ionic liquid
  • Method for preparing porous germanium by utilizing electrodeposition of ionic liquid

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specific Embodiment approach 1

[0027] Specific embodiment 1: A method for preparing porous germanium by ionic liquid electrodeposition described in this embodiment is specifically carried out according to the following steps:

[0028] 1. Hydrogen foam method: Polish the nickel sheet and the pure copper sheet until smooth, remove impurities and surface oxide layers, and obtain the polished nickel sheet and polished pure copper sheet, and connect the polished nickel sheet to the negative electrode of the DC power supply Connect to get the negative pole piece, connect the polished pure copper piece to the positive pole of the DC power supply to get the positive pole piece, then place the positive pole piece and the negative pole piece in the electrolyte, and set the voltage of the DC power supply to 2V ~ 20V , the current is 0.1A~5A, and the reaction is 5s~20s, and the porous metal copper foil is obtained;

[0029] The distance between the positive pole piece and the negative pole piece is 1 cm to 10 cm; the e...

specific Embodiment approach 2

[0045] Embodiment 2: The difference between this embodiment and Embodiment 1 is that in step 1, the voltage of the DC power supply is set to 20V, and the current is 5A. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0046] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the distance between the positive pole piece and the negative pole piece described in step 1 is 8 cm. Others are the same as in the first or second embodiment.

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Abstract

The invention relates to a method for preparing porous germanium by utilizing electrodeposition of ionic liquid. The invention relates to the method for preparing the porous germanium. The invention aims the solve the problems that germanium-based materials prepared by the existing method are mostly granular, even if gaps exist among granules, the gaps are smaller and unordered, and cannot better buffer volume expansion of the germanium, or the gaps in block shapes cannot provide more buffer space, and meanwhile, the traditional preparation method is high in preparation cost, not environment-friendly, and tedious in process. The method comprises the following steps of (1) a hydrogen foam method; (2) cleaning treatment of electrodes; (3) cleaning treatment of electrolytic cells; (4) electrodeposition of the ionic liquid, so that the porous germanium prepared by utilizing electrodeposition of the ionic liquid is obtained. The invention is applied to a method for preparing the porous germanium by utilizing electrodeposition of the ionic liquid.

Description

technical field [0001] The invention relates to a method for preparing porous germanium. Background technique [0002] Ionic liquids are liquids completely composed of cations and anions, generally composed of organic cations and inorganic anions, which are liquid at room temperature and belong to organic salts, with extremely low vapor pressure, good chemical stability, non-flammability, and electrochemical window Wide, good heat resistance, no environmental pollution and many other advantages are widely used. The traditional water-based electroplating will pollute the environment due to the production of strong acid and strong alkali. The electrodeposition of ionic liquids can well avoid the discharge of toxic substances and cause less pollution to the environment. [0003] For germanium, a high-capacity negative electrode material, due to serious volume expansion changes during charging and discharging, the active material will be separated from the current collector, re...

Claims

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Application Information

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IPC IPC(8): H01M4/38
CPCH01M4/044H01M4/0452H01M4/0471H01M4/13H01M4/139H01M4/38H01M2004/027Y02E60/10
Inventor 赵九蓬李孟愈李垚郝健
Owner HARBIN INST OF TECH
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