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Lithium carbon dioxide battery cathode and preparation method thereof

A carbon dioxide, battery cathode technology, applied in the field of electrochemical energy, can solve the problems of poor structural stability of MoC/C nanocomposite materials, poor electrochemical performance of batteries, and inability to industrialize production, etc. Diffusion, good cycle life, improved electrochemical performance

Active Publication Date: 2019-05-17
浙江硕亚油脂化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The MoC / C nanocomposite material prepared by the method has poor structural stability, low catalytic activity and short cycle life
[0006] CN108448119A discloses a flexible fibrous lithium-carbon dioxide battery with low charging voltage. The flexible fibrous lithium-carbon dioxide battery with low charging voltage is composed of metal lithium wire, gel electrolyte, and working electrode from the inside to the outside. and porous heat-shrinkable tube, the preparation process of the flexible fibrous lithium-carbon dioxide battery with low charging voltage is complicated, it cannot be industrialized, and the electrochemical performance of the prepared battery is poor

Method used

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  • Lithium carbon dioxide battery cathode and preparation method thereof
  • Lithium carbon dioxide battery cathode and preparation method thereof
  • Lithium carbon dioxide battery cathode and preparation method thereof

Examples

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Embodiment 1

[0068] A method for preparing a positive electrode of a lithium carbon dioxide battery comprises the steps of:

[0069] (1) the polystyrene pellet that particle diameter is 210nm is soaked in the mixed solution of ferric nitrate nonahydrate and ethylene glycol and methanol 8h, and the molar concentration of ferric nitrate nonahydrate is 2mol / L in the described mixed solution, described The volume ratio of ethylene glycol and methanol is 1.5:1, the precursor is obtained by suction filtration, the precursor is dried at 50°C for 26h, and the product obtained by drying is heated to 300°C at a heating rate of 1°C / min and kept for 4h , and then heated to 500°C for 4 hours to obtain a three-dimensional pore structure α-Fe 2 o 3 , the three-dimensional pore structure of α-Fe 2 o 3 The X-ray diffraction pattern of figure 1 As shown, it can be seen from the diffraction peaks in the figure that the obtained product is α-Fe 2 o 3 And the purity is high without impurity peaks, the th...

Embodiment 2

[0072] The difference with Example 1 is that the three-dimensional pore structure α-Fe in step (2) 2 o 3 The mass ratio of conductive carbon black Super P is 0.125:1.

Embodiment 3

[0074] The difference with Example 1 is that the three-dimensional pore structure α-Fe in step (2) 2 o 3 The mass ratio of conductive carbon black Super P is 8.1:1.

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Abstract

The invention relates to a lithium carbon dioxide battery cathode and a preparation method thereof. The lithium carbon dioxide battery cathode comprises a current collector and an electrode material layer disposed on the current collector, wherein the electrode material layer comprises three-dimensional pore structure metal compounds, a carbon material and a bonding material. By providing three-dimensional pore structure metal compounds in the electrode material layer, the lithium carbon dioxide battery cathode and preparation method thereof have the advantages that on the one hand, the three-dimensional pore structures make a larger specific surface area and more reactive active sites, thereby imparting good electrochemical performance to the lithium carbon dioxide battery; and on the other hand, the three-dimensional pore structure metal compounds have a large pore size and are uniformly distributed, which is favorable for ion transport in the electrolyte and diffusion of carbon dioxide gas to impart a good cycle life of the lithium carbon dioxide battery cathode and reduce the cathode polarization. The provision of the carbon material in the material layer can impart good electrical conductivity to the lithium carbon dioxide battery cathode, and further improve the electrochemical performance of the lithium carbon dioxide battery.

Description

technical field [0001] The invention belongs to the technical field of electrochemical energy, and in particular relates to a positive electrode of a lithium carbon dioxide battery and a preparation method thereof. Background technique [0002] With the increasing global energy crisis and environmental pollution, it is urgent to develop a new type of energy storage system that is efficient, clean, safe and reliable. At present, some high-energy-density secondary battery systems, such as lithium-ion batteries or lithium-air batteries, have attracted extensive attention from researchers, but traditional lithium-ion batteries are limited by power density and energy density, and can no longer meet the needs of electric vehicles for long-distance transportation and transportation. Smart grid requirements. [0003] At present, most of the research on lithium-air batteries is limited to operation in high-purity oxygen. The metal hydroxides and metal carbonates formed by the reacti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/88H01M4/90H01M12/08
CPCY02E60/10
Inventor 罗绍华黄红波刘彩玲闫绳学冯建王志远王庆张亚辉刘延国赵鑫郝爱民刘忻刘宣文郭瑞伊廷锋王亚峰
Owner 浙江硕亚油脂化工有限公司
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