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Application of a chlorine-doped polymer-based composite material in cathode materials for chloride-ion batteries

A composite material, battery cathode technology, applied in battery electrodes, nanotechnology for materials and surface science, circuits, etc., can solve problems such as large volume changes of metal oxychloride, and achieve the effect of improving cycle stability

Active Publication Date: 2019-03-01
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a kind of chlorine-doped polymer-based composite material in the positive electrode material of chloride ion battery in order to improve the problem of desolvation of the existing metal chloride positive electrode and the large volume change problem of metal oxychloride. application

Method used

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  • Application of a chlorine-doped polymer-based composite material in cathode materials for chloride-ion batteries
  • Application of a chlorine-doped polymer-based composite material in cathode materials for chloride-ion batteries
  • Application of a chlorine-doped polymer-based composite material in cathode materials for chloride-ion batteries

Examples

Experimental program
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Effect test

Embodiment 1

[0023] 1), material preparation and battery assembly: use pyrrole (0.42ml) as the monomer, carbon nanotubes as the carbon matrix, deionized water as the reaction medium, ferric chloride hexahydrate (50ml, 0.29M) as the oxidant and chlorine doped Miscellaneous agent, the molar ratio of ferric chloride hexahydrate and pyrrole monomer is 2.35:1; wherein the carbon nanotubes are oxidized by sulfuric acid / nitric acid. The chlorinated polypyrrole-based composite material (carbon nanotube content is 18%) was obtained by chemical reduction (reaction 4 hours), and this process was carried out under the protection of nitrogen atmosphere; the morphology is as follows figure 1 shown; figure 2 The energy spectrum results in , show the efficient doping of chlorine element in the polymer composite. The composite material is mixed with acetylene black and PTFE, and then coated on a stainless steel mesh, and then cold-pressed to make a positive electrode; the negative electrode material is L...

Embodiment 2

[0027] 1), material preparation and battery assembly: use pyrrole (0.42ml) as monomer, ferric chloride hexahydrate (50ml, 0.49M) as oxidant and chlorine dopant, deionized water as reaction medium, trichloride hexahydrate The molar ratio of iron oxide and pyrrole monomer is 4:1, and polypyrrole chloride is obtained by chemical reduction (10 hours of reaction), and this process is carried out under the protection of argon atmosphere; C, N, H element analysis shows that the The C:N:H of the prepared polypyrrole is 3.98:1:3.04, which is very close to the theoretical composition. Mix polypyrrole with acetylene black and PTFE, apply it on stainless steel mesh, and then cold press it to make a positive electrode; the negative electrode material is Li, and the electrolyte is 0.5MPP 14 Cl / PP 14 TFSI mixed ionic liquid.

[0028] 2) The results of charge and discharge experiments show that the first discharge capacity of the polypyrrole positive electrode material is 105mAh / g. After 3...

Embodiment 3

[0030] 1), material preparation and battery assembly: use thiophene (0.4ml) as a monomer, carbon nanotubes as a carbon matrix, ferric chloride hexahydrate (50ml, 0.3M) as an oxidant and a chlorine dopant, and deionized water as In the reaction medium, the molar ratio of ferric chloride hexahydrate and pyrrole monomer is 3:1; wherein the carbon nanotubes are oxidized by sulfuric acid / nitric acid. The chlorinated polythiophene-based composite material (carbon nanotube content is 35%) was obtained by chemical reduction (reaction 6 hours), and this process was carried out under the protection of a nitrogen atmosphere; the composite material was mixed with acetylene black and PTFE and then coated with onto a stainless steel mesh, and then cold-pressed to make a positive electrode; the negative electrode material is Li, and the electrolyte is 0.5M PP 14 Cl / PP 14 TFSI mixed ionic liquid.

[0031] 2) The results of charge and discharge experiments show that the first discharge capac...

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Abstract

The invention relates to an application of a chlorine-doped polymer matrix composite to a chloride-ion battery cathode material. The mass of a chlorine-doped polymer in the chlorine-doped polymer matrix composite is 50%-100% of that of the polymer matrix composite, and the mass of a carbon material is 0-50% of that of the polymer matrix composite. With the adoption of the chlorine-doped polymer matrix composite, the problem of desolvation of a chloride-ion battery metal chloride cathode material and the problem of larger volume change of the metal chloride cathode material in charging and discharging processes can be solved, the cyclic stability of the chloride-ion battery cathode material can be remarkably improved, and the chlorine-doped polymer matrix composite play an important role in promoting development of high-stability chloride-ion batteries.

Description

technical field [0001] The invention belongs to the field of energy, and in particular relates to the application of a chlorine-doped polymer-based composite material in the cathode material of a chloride ion battery. Background technique [0002] Chloride ion battery is a new type of secondary battery based on chloride anion conduction. The battery includes a variety of electrode systems, and its theoretical energy density reaches 2500Wh / l, which is higher than that of traditional lithium-ion batteries. Mg, Ca, Na, FeCl with high element abundance 3 , CuCl 2 and MgCl 2 And other materials can be used as electrode materials for chloride ion batteries. Although chloride-ion batteries have a large ionic radius, they can also exhibit relatively high mobility and reaction reversibility. [0003] In previous studies, chloride-ion batteries consisted of a metal chloride / metal electrode system and an ionic liquid electrolyte capable of transporting chloride ions. Zhao et al r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/583H01M4/60H01M4/62B82Y30/00
CPCB82Y30/00H01M4/362H01M4/583H01M4/608H01M4/625Y02E60/10
Inventor 赵相玉杨猛沈晓冬
Owner NANJING TECH UNIV
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