Organic electrolyte system lithium-iodine secondary battery and preparation method thereof

An organic electrolyte, secondary battery technology, applied in secondary batteries, circuits, electrical components, etc., can solve the problems of complex preparation of positive electrode materials and serious self-discharge, reduce self-discharge effect, improve conductivity, high rate performance effect

Active Publication Date: 2018-10-30
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an organic electrolyte system lithium-iodine secondary battery and its preparation method, which can overcome the problems of serious self-discharge and complicated preparation of positive electrode materials in the current organic electrolyte system lithium-iodine secondary battery

Method used

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  • Organic electrolyte system lithium-iodine secondary battery and preparation method thereof
  • Organic electrolyte system lithium-iodine secondary battery and preparation method thereof
  • Organic electrolyte system lithium-iodine secondary battery and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Embodiment 1: Prepare iodine / activated carbon cloth composite material by room temperature "dissolution-adsorption" method, the steps are as follows:

[0031] (1) Add 56mg of iodine elemental substance into 100ml of water.

[0032] (2) Set the area to 10cm 2 The activated carbon cloth was added to the above solution.

[0033] (3) Stir at room temperature for 2 hours until the solution becomes clear.

[0034] (4) Filtrate to obtain the activated carbon cloth / iodine composite material, wash with water three times, and dry at 80°C.

[0035] The obtained sample is the iodine / activated carbon cloth composite material, and its scanning electron microscope photo is shown in figure 1 . In order to measure the iodine content in the composite material, it has been carried out thermogravimetric test, and the obtained weight loss curve is shown in figure 2 , the measured mass fraction of iodine is 22%, corresponding to 5.6 mg / cm 2. Carried out X-ray photoelectron spectrosco...

Embodiment 2

[0038] Embodiment 2: Prepare iodine / CMK-3 composite material by room temperature "dissolution-adsorption" method, the steps are as follows:

[0039] (1) Add 50mg of iodine elemental substance into 100ml of water.

[0040] (2) Add 100 mg of CMK-3 to the above solution.

[0041] (3) Stir at room temperature for 2 hours until the solution becomes clear.

[0042] (4) The precipitate was obtained by filtration, washed with water three times, and then dried at 80°C.

[0043] The obtained sample is the iodine / CMK-3 composite material, and its scanning electron microscope photo is shown in Figure 8 . Using this material to prepare a positive electrode, the steps are as follows:

[0044] Mix iodine / CMK-3 composite material, conductive carbon superP, binder sodium carboxymethyl cellulose (CMC) and oil-extended styrene-butadiene rubber (SBR) in water according to the mass ratio of 80:10:5:5, and grind them evenly Afterwards, the obtained slurry was coated on an aluminum foil, and d...

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Abstract

An organic electrolyte solution system lithium-iodine secondary battery and a manufacturing method. The battery comprises a positive electrode, a negative electrode, a separator, and an electrolyte solution. An elemental iodine / carbon composite active material is used for the positive electrode. The negative electrode is lithium metal or a lithium-containing alloy. The electrolyte solution is an ester electrolyte solution containing an anhydrous lithium nitrate additive. Employed is a "dissolution-adsorption" method, in which elemental iodine and a carbon material are added into an aqueous solution and synthesized by stirring. With the elemental iodine / carbon composite material as the positive electrode, the porous structure of the carbon material is capable of adsorbing iodine and other lithium salt, suppressing dissolution of same, and increasing cycle stability. At the same time, the great electrical conductivity of the carbon material allows an increase in the rate performance of the electrodes. The anhydrous lithium nitrate additive in the electrolyte solution can react with the negative electrode to form a smooth protective layer, thus suppressing a self-discharging effect of the battery.

Description

technical field [0001] The invention relates to an organic electrolyte system lithium-iodine secondary battery and a preparation method thereof, in particular to an organic electrolyte system lithium-iodine secondary battery with an iodine / carbon composite material as the positive electrode and a preparation method thereof. Background technique [0002] Lithium-iodine solid-state electrolyte primary batteries have the advantages of high energy density, high reliability, and small self-discharge, and have been used in cardiac pacemaker power supplies since 1972 (J.R.Moser, US Patent, 3,660,163). However, this kind of battery has a large internal resistance during the discharge process, and the rate performance is greatly limited. In 2011, Liu et al. reported a rechargeable all-solid-state lithium-iodine secondary battery, but its rate performance was still poor (F.C.Liu, W.M.Liu, M.H.Zhan, Z.W.Fu, H.Li, Anallsolid-staterechargeablelithium-iodinethinfilmb atteryusingLiI( 3-hy...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): H01M10/0567H01M10/0566
CPCH01M10/0567Y02E60/10
Inventor陈军赵庆卢艳莹陶占良朱智强胡宇翔
OwnerNANKAI UNIV