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Double-cathode sulfide-metal ion battery and preparation method thereof

A technology of metal ions and sulfides, applied in battery electrodes, secondary batteries, circuits, etc., can solve problems such as shortage of resources, rapid rise in raw material costs, etc., achieve low cost, increase charge and discharge rate and overload capacity, and low energy consumption Effect

Active Publication Date: 2021-08-17
杭州怡莱珂科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, there is a shortage of resources in the lithium-ion batteries used in large quantities, the cost of raw materials has risen too fast, and there are safety hazards such as spontaneous combustion.

Method used

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  • Double-cathode sulfide-metal ion battery and preparation method thereof

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preparation example Construction

[0039] In the present invention, the steps of the preparation method of the double-cathode sodium sulfide-sodium ion battery are as follows:

[0040] 1) Two ion diaphragms are arranged in the battery shell, the anode chamber is between the diaphragms, and there is a cathode chamber on each side to prevent the anode and the cathode from directly contacting. The sodium sulfide-carbon in-situ composite electrode anode and metal cathode are placed in the battery casing, and the sodium ion electrolyte solution is poured;

[0041] In the present invention, the battery case may be a hard plastic case or a soft plastic bag. The technology used for arranging the separator in the battery casing is a conventional general technology, such as: thermoplastic, ultrasonic welding, adhesive bonding, etc. The diaphragm and the battery casing need to be sealed reliably, otherwise it will cause a short circuit inside the battery.

[0042] 2) Put the battery case together with the electrode and t...

Embodiment 1

[0074] 1) Take 50 grams of formamide, 30 grams of propylene carbonate and 20 grams of γ-butyrolactone, heat and stir until the solvent is removed to obtain a mixed solvent.

[0075] 2) Take 75 grams of mixed solvent, add 15 grams of 1-ethyl-3-methylimidazole trifluoroacetic acid and 10 grams of sodium trifluoroacetate, and stir until completely dissolved to obtain a sodium ion electrolyte solution.

Embodiment 2

[0077] 1) Take 70 grams of dimethylformamide, 10 grams of ethylene carbonate and 20 grams of dimethyl carbonate, heat and stir to remove the solvent to obtain a mixed solvent.

[0078] 2) Take 80 grams of mixed solvent, add 12 grams of 1-butyl 3-methylimidazole trifluoromethanesulfonate and 8 grams of sodium trifluoromethanesulfonate, and stir until completely dissolved to obtain a sodium ion electrolyte solution.

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PUM

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Abstract

The invention discloses a double-cathode sulfide-metal ion battery and a preparation method thereof. The battery is provided with two metal cathodes and a sulfide-carbon in-situ composite electrode anode, wherein the cathodes are located on the two sides of the anode, and an ion diaphragm is arranged between the cathodes and the anode. The double-cathode arrangement multiplies the contact area of the anode and the cathode in the battery from the structural angle, so the charge-discharge rate and the overload capacity of the battery are improved. According to the sulfide-carbon in-situ composite electrode provided by the invention, the microcrystal sulfide and the carbon carrier are compounded on the microscopic scale, so the defect of low conductivity of an intermediate product in the charge-discharge process of the sulfide is overcome, and the charge-discharge cycle performance of the electrode is improved. The metal ion electrolyte solution provided by the invention is wide in raw material source, and simple and convenient to prepare, use and operate. The battery provided by the invention is superior to the current lithium ion battery anode material in energy density and comprehensive performance, and has a good application prospect in the field of high-capacity batteries.

Description

technical field [0001] The invention belongs to the field of energy, and in particular relates to a double cathode sulfide-metal ion battery. Background technique [0002] At present, there is a shortage of resources for lithium-ion batteries that are widely used, the cost of raw materials is rising too fast, and there are potential safety hazards such as spontaneous combustion. Compared with ternary lithium-ion batteries and lithium iron phosphate electrode materials, sulfides have higher energy density, rich sources of raw materials, and significantly better safety performance than lithium-ion electrode materials. The main obstacle to the development and application of sulfide-metal ion batteries is the anode material and its supporting electrolyte solution. [0003] Aiming at the technical difficulties existing in sulfide-metal ion batteries, the present invention proposes solutions from three aspects: battery structure, electrode material and electrolyte solution compos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/583H01M4/62H01M10/0525H01M10/054
CPCH01M4/5815H01M4/362H01M4/583H01M4/625H01M10/054H01M10/0525Y02P70/50
Inventor 叶瑛杜昊张平萍
Owner 杭州怡莱珂科技有限公司