A kind of preparation method of polycrystalline silicon-based nanostructure lithium battery
A nano-structure, polysilicon technology, applied in the manufacture of electrolyte batteries, battery electrodes, structural parts, etc., can solve the problems of high cost and limited application, and achieve the effect of improving the capacity of lithium batteries and facilitating large-scale promotion.
Active Publication Date: 2017-05-03
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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Problems solved by technology
However, so far, this method mostly uses single crystal silicon as the starting material for the preparation of silicon nanostructures, and the high cost limits its practical application in lithium batteries.
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[0041] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.
[0042] Such as figure 1 as shown, figure 1 It is a flow chart of a method for preparing a polycrystalline silicon-based nanostructure lithium battery provided by the present invention, and the method includes the following steps:
[0043] Step 10: Take a polysilicon-based material, and prepare the polysilicon-based material into a polysilicon-based nanomaterial;
[0044] Step 20: Mix the polysilicon-based nanomaterial with a conductive agent, a binder and water to prepare a slurry, coat it on the copper collector film, dry and weigh it to form a first composite film, and use the first composite film As a polysilicon-based nanomaterial negative electrode;
[0045] Step 30: Mix the positive electrode material with a cond...
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Abstract
The invention discloses a method for preparing a polysilicon-based nanostructure lithium battery, comprising: taking a polysilicon-based material, preparing the polysilicon-based material into a polysilicon-based nanomaterial; combining the polysilicon-based nanomaterial with a conductive agent, a binder and mixed with water to prepare a slurry, coated on the copper collector film, dried and weighed to form the first composite film, and the first composite film was used as the polysilicon-based nanomaterial negative electrode; the positive electrode material and the conductive agent, the binder mixed with water, fully stirred and mixed to prepare a slurry, coated on the aluminum collector, baked and weighed to form a second composite film, using the second composite film as the positive electrode; the polysilicon-based nanomaterial negative electrode, the The positive electrode, electrolyte and separator are assembled into a battery. The method has the advantages of simple manufacturing process, low price and easy realization of industrialized production and application.
Description
technical field [0001] The invention belongs to the technical field of semiconductors, and in particular relates to a preparation method of a polysilicon-based nanostructure lithium battery. Background technique [0002] With the rapid development of science and technology and the increasing awareness of environmental protection, the new energy industry has a strong momentum of development. As intermittent new energy sources, some solar energy and wind energy require high-performance batteries for storage. Moreover, the development of electric vehicles to improve the urban environment also puts forward higher requirements on the capacity and life of lithium-ion batteries. Silicon material has the highest lithium intercalation capacity so far, reaching 4200mAh / g, which is 10 times the capacity of the existing carbon negative electrode of lithium batteries, and has the potential to become the dominant lithium battery negative electrode in the future (Nature Nanotechnol.3, 31,...
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IPC IPC(8): H01M10/058H01M4/139
CPCH01M4/1395H01M10/058Y02E60/10Y02P70/50
Inventor 李传波张春倩张大林薛春来成步文王启明
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI