A new energy battery electrolyte valence state control device

Abstract

The present invention discloses a device for regulating the valence state of electrolyte of a new energy battery, comprising a plurality of positive electrode materials, wherein the positive electrode materials comprise a carbon fiber core, an exfoliated carbon cloth and a porous vanadium oxide layer, wherein the carbon fiber core, the exfoliated carbon cloth and the porous vanadium oxide layer are concentrically distributed, wherein the exfoliated carbon cloth is coated on the outer surface of the carbon fiber core, and the porous vanadium oxide layer is coated on the outer surface of the exfoliated carbon cloth, and the outer surface of the exfoliated carbon cloth is provided with a peeling surface, and the present invention relates to the technical field of new energy batteries. The device for regulating the valence state of electrolyte of a new energy battery is provided with an exfoliated carbon cloth, and the peeling surface can effectively buffer the deformation stress generated by the vanadium oxide during charging and discharging, reduce structural damage, and prevent the material structure from pulverizing and collapsing. In addition, the porous vanadium oxide layer formed by electrochemical oxidation has extremely high electrochemical stability, and effectively inhibits the generation of soluble vanadium oxide ions.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy batteries, and in particular to a device for regulating the valence state of electrolyte in new energy batteries. Background Art

[0002] The development and utilization of clean energy is the current research focus in the energy field. Most clean energy (such as solar energy and wind energy) is unevenly distributed in time and space. Therefore, the effective utilization of these energy sources requires reliable energy storage devices. Supercapacitors are energy storage devices that can quickly store and release energy. They have great application potential in fields such as clean energy storage. Electrode materials are an important factor affecting the performance of supercapacitors and determine the energy storage capacity of supercapacitors. Vanadium oxide is low in price and has a high theoretical capacitance value. It is a high-performance electrode material that has attracted much attention. However, vanadium oxide has problems such as poor stability, which seriously restricts its commercial application. Studies have shown that the low stability of vanadium oxide can be attributed to two reasons: First, during long-term charge and discharge cycles, vanadium oxide continues to deform (expand and shrink), eventually causing structural collapse or pulverization; second, when vanadium oxide is continuously charged and discharged in an aqueous electrolyte, it is easy to gradually form water-soluble vanadium oxide ions. Therefore, after long-term work, the active components of vanadium oxide are easy to gradually lose, resulting in the continuous attenuation of the performance of the assembled supercapacitor. How to overcome the above two shortcomings and prepare vanadium oxide supercapacitor electrodes with stable performance has always been a challenge faced by the field of new materials and energy research. Summary of the invention

[0003] In view of the shortcomings of the prior art, the present invention provides a valence state regulating device for electrolyte of new energy batteries, which solves the problem that during the cyclic charge and discharge process of vanadium oxide, ions that can be dissolved in water and the collapse of the structure are produced during the continuous insertion and extraction of ions of vanadium oxide, resulting in poor cyclic stability of vanadium oxide in water-soluble electrolyte.

[0004] To achieve the above objectives, the present invention is implemented through the following technical scheme: a new energy battery electrolyte valence state control device, comprising a plurality of positive electrode materials, the positive electrode material comprising a carbon fiber core, an exfoliated carbon cloth and a porous vanadium oxide layer, the carbon fiber core, the exfoliated carbon cloth and the porous vanadium oxide layer are concentrically distributed, the exfoliated carbon cloth is coated on the outer surface of the carbon fiber core, the porous vanadium oxide layer is coated on the outer surface of the exfoliated carbon cloth, and the outer surface of the exfoliated carbon cloth is provided with a peeling surface.

[0005] Preferably, the exfoliating carbon cloth is composited by a base carbon cloth and a mesh carbon cloth, and the mesh carbon cloth is overlapped and covered on the base carbon cloth.

[0006] Preferably, the porous vanadium oxide layer is formed by in-situ growth of vanadium trioxide on the peeling surface through electrochemical technology.

[0007] Preferably, the peeling surface is acted on the outer surface of the exfoliated carbon cloth by electrochemical technology to form a loose carbon shell structure.

[0008] Beneficial Effects

[0009] The present invention provides a device for regulating the valence state of electrolyte in a new energy battery. Compared with the prior art, it has the following beneficial effects:

[0010] The new energy battery electrolyte valence state regulating device is provided with an exfoliated carbon cloth, and a porous vanadium oxide layer is covered on the peeling surface of the outer surface of the exfoliated carbon cloth. The peeling surface can effectively buffer the deformation stress generated by the vanadium oxide during charging and discharging, reduce structural damage, and prevent the material structure from pulverizing and collapsing. In addition, the porous vanadium oxide layer formed by electrochemical oxidation has extremely high electrochemical stability. The optimized vanadium oxide is used as the positive electrode material, which effectively inhibits the generation of soluble vanadium oxide ions and prevents the chemical dissolution and loss of vanadium oxide. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the present invention;

[0012] Figure 2 It is a schematic diagram of the internal structure of the present invention;

[0013] Figure 3 It is a schematic diagram of the structure of the exfoliating carbon cloth of the present invention;

[0014] In the figure:

[0015] 100. Positive electrode material;

[0016] 110, carbon fiber core;

[0017] 120, exfoliating carbon cloth; 121, base carbon cloth; 122, mesh carbon cloth;

[0018] 130. Porous vanadium oxide layer;

[0019] 140. Peeling surface. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] See also Figure 1-3The present invention provides a technical solution: a new energy battery electrolyte valence state regulating device, comprising a plurality of positive electrode materials 100, the positive electrode material 100 comprising a carbon fiber core 110, an exfoliated carbon cloth 120 and a porous vanadium oxide layer 130, the carbon fiber core 110, the exfoliated carbon cloth 120 and the porous vanadium oxide layer 130 are concentrically distributed, the exfoliated carbon cloth 120 is coated on the outer surface of the carbon fiber core 110, the porous vanadium oxide layer 130 is coated on the outer surface of the exfoliated carbon cloth 120, and the outer surface of the exfoliated carbon cloth 120 is provided with a peeling surface 140.

[0022] Based on the above-mentioned structural setting, the new energy battery electrolyte valence state regulating device is composed of a plurality of positive electrode materials 100, wherein the positive electrode material 100 is composed of a carbon fiber core 110, an exfoliated carbon cloth 120 and a porous vanadium oxide layer 130, wherein the carbon fiber core 110 provides structural support for the coating of the exfoliated carbon cloth 120, and the exfoliated carbon cloth 120 is coated on the outer surface of the carbon fiber core 110 and provides structural support for the coating of the porous vanadium oxide layer 130. Specifically, after the surface of the carbon cloth is electrochemically treated, a peeling surface 140 is formed on its surface. Finally, the staff covers the surface of the peeling surface 140 with the porous vanadium oxide layer 130, and the peeling surface 140 is directed to the porous vanadium oxide layer 1 30 provides a structural buffer, and at the same time, the porous vanadium oxide layer 130 has extremely high electrochemical stability. The new energy battery electrolyte valence state regulating device is provided with an exfoliated carbon cloth 120, and the porous vanadium oxide layer 130 is covered on the peeling surface 140 on the outer surface of the exfoliated carbon cloth 120. The peeling surface 140 can effectively buffer the deformation stress generated by the vanadium oxide during charging and discharging, reduce structural damage, and prevent the material structure from pulverizing and collapsing. In addition, the porous vanadium oxide layer 130 formed by electrochemical oxidation has extremely high electrochemical stability. The optimized vanadium oxide is used as the positive electrode material, which effectively inhibits the generation of soluble vanadium oxide ions and prevents the chemical dissolution and loss of vanadium oxide.

[0023] Furthermore, the exfoliating carbon cloth 120 is composited by a base carbon cloth 121 and a mesh carbon cloth 122, and the mesh carbon cloth 122 is overlapped and covered on the base carbon cloth 121. The exfoliating carbon cloth 120 adopts a composite structure, with the base carbon cloth 121 as a substrate, and cooperates with the mesh carbon cloth 122 covered thereon, so that a mesh-like pitted surface can be formed on the outer surface of the exfoliating carbon cloth 120, and the porous vanadium oxide layer 103 is covered on this plane, so that the porous vanadium oxide layer 130 forms a concave-convex surface, and the enrichment of structural water in the vanadium oxide can expand the vanadium oxide layer spacing, so that the ions in the electrolyte are more easily embedded in and out of the vanadium oxide. In addition, the charging and discharging process causes structural optimization, which increases the contact area between the electrode material and the ions in the electrolyte.

[0024] Furthermore, the porous vanadium oxide layer 130 is formed by in-situ growth of vanadium trioxide on the peeling surface 140 through electrochemical technology. Among them, the valence-optimized porous vanadium oxide layer 130 is obtained by electrochemically oxidizing vanadium trioxide at a low voltage of 0.7 V for 20 seconds in one step. The optimization process is simple, mild, fast, and low in energy consumption, which can allow large-area electrode optimization. This optimized vanadium oxide can be used as a positive electrode material 100 of a high-performance supercapacitor. In addition, the prepared vanadium oxide electrode has extremely high electrochemical stability, and the capacitance is stable after cyclic charge and discharge.

[0025] Furthermore, the peeling surface 140 is electrochemically acted on the outer surface of the exfoliated carbon cloth 120 to form a loose carbon shell structure. The exfoliated carbon cloth 120 is a carbon cloth composed of a base carbon cloth 121 and a mesh carbon cloth 122 as a whole, and electrochemical peeling is performed on its outer surface, so that the outer surface of the mesh carbon cloth 122 and the exposed part of the base carbon cloth 121 in the mesh are peeled off, and the outer surface of the peeled carbon cloth forms a loose carbon shell structure, which can effectively buffer the deformation stress generated by vanadium oxide during charging and discharging.

[0026] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for regulating the valence state of electrolyte of a new energy battery, characterized in that: Comprising a plurality of positive electrode materials (100), the positive electrode materials (100) comprising a carbon fiber core (110), an exfoliated carbon cloth (120) and a porous vanadium oxide layer (130), the carbon fiber core (110), the exfoliated carbon cloth (120) and the porous vanadium oxide layer (130) being concentrically distributed, the exfoliated carbon cloth (120) being coated on the outer surface of the carbon fiber core (110), the porous vanadium oxide layer (130) being coated on the outer surface of the exfoliated carbon cloth (120), and the outer surface of the exfoliated carbon cloth (120) being provided with a peeling surface (140); The exfoliating carbon cloth (120) is composited from a base carbon cloth (121) and a mesh carbon cloth (122), wherein the mesh carbon cloth (122) is overlapped and covered on the base carbon cloth (121); The porous vanadium oxide layer (130) is formed by in-situ growth of vanadium trioxide on the peeling surface (140) through electrochemical technology; The peeling surface (140) acts on the outer surface of the exfoliating carbon cloth (120) by electrochemical technology and forms a loose carbon shell structure.

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