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A method for synthesizing porous black phosphorus nanosheets for ion battery anode materials

A negative electrode material, ion battery technology, applied in battery electrodes, negative electrodes, nanotechnology, etc., can solve the problems of complex construction method of porous black phosphorus nanosheets, complex two-dimensional black phosphorus nanosheets, and harsh synthesis conditions.

Active Publication Date: 2022-05-17
HARBIN ENG UNIV +1
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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 problems that the synthesis conditions of existing black phosphorus materials are harsh, two-dimensional black phosphorus nanosheets need complex ultrasonic stripping, and the construction method of porous black phosphorus nanosheets is complicated, and the pore size is too large, and further provides a method for ionic Synthesis method of porous black phosphorus nanosheets for battery anode materials

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  • A method for synthesizing porous black phosphorus nanosheets for ion battery anode materials
  • A method for synthesizing porous black phosphorus nanosheets for ion battery anode materials
  • A method for synthesizing porous black phosphorus nanosheets for ion battery anode materials

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specific Embodiment approach 1

[0022] Specific embodiment one: present embodiment is a kind of method for the synthesis of porous black phosphorus nano-sheets of ion battery negative electrode material, and it is carried out according to the following steps:

[0023] 1. Add phosphorus trichloride, anhydrous zinc chloride and metallic sodium into a stainless steel ball mill tank, and mill for 30 to 100 minutes to obtain a ball mill mixture;

[0024] The molar ratio of the sodium metal to phosphorus trichloride is (2-4):1; the molar ratio of the anhydrous zinc chloride to phosphorus trichloride is 1:(5-20);

[0025] 2. Add the ball mill mixture into ethanol, soak for 10min to 30min, then place in dilute hydrochloric acid, soak for 10min to 30min, and finally wash with deionized water to obtain the cleaned product, centrifuge the cleaned product, and finally vacuum Dry to obtain porous black phosphorus nanosheets.

[0026] The beneficial effects of this embodiment are:

[0027] The traditional black phosphor...

specific Embodiment approach 2

[0030] Specific embodiment two: the difference between this embodiment and specific embodiment one is that in step one, the ball milling speed is 100rpm / min~300rpm / min and the ball-to-material ratio is (5~10):1 under the condition of 1, ball milling 30min~ 100min. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0031] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the concentration of dilute hydrochloric acid described in step 2 is 0.5 mol / L-2 mol / L. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a method for synthesizing porous black phosphorus nanosheets used for negative electrode materials of ion batteries, which belongs to the technical field of nanomaterial synthesis. The present invention solves the problems of harsh synthesis conditions of existing black phosphorus materials, complicated ultrasonic stripping of two-dimensional black phosphorus nanosheets, complex construction method of porous black phosphorus nanosheets, and excessively large pore size. The preparation method: 1. ball milling phosphorus trichloride, anhydrous zinc chloride and metal sodium to obtain a ball milling mixture; 2. cleaning, centrifuging and vacuum drying the ball milling mixture to obtain porous black phosphorus nanosheets. The invention is used for the synthesis of porous black phosphorus nano-sheets used for negative electrode materials of ion batteries.

Description

technical field [0001] The invention belongs to the technical field of nanometer material synthesis. Background technique [0002] Black phosphorus is a layered crystalline material with good electronic conductivity and is a good electrode material. At the same time, phosphorus is one of the anode materials for high-capacity lithium and sodium-ion batteries, with a theoretical capacity of up to 2596mAh / g. [0003] However, the synthesis of black phosphorus is still very difficult. The commonly used preparation raw material is red phosphorus, which usually requires extremely high pressure treatment or high speed, high ball-to-material ratio and long-time ball milling to synthesize black phosphorus products. After black phosphorus is synthesized, complex solvent ultrasonic stripping is required to prepare two-dimensional black phosphorus nanosheets. Moreover, the ultrasonic stripping process of this method also causes severe oxidation on the surface of the black phosphorus ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B25/02H01M4/38B82Y40/00
CPCC01B25/02H01M4/38B82Y40/00H01M2004/027Y02E60/10
Inventor 刘志亮陈雷杨飘萍赵颖王思皓王庭禹丁鹤贺飞
Owner HARBIN ENG UNIV