Chalcogenide semi-solid lithium battery and preparing method thereof

A semi-solid and lithium battery technology, applied in the manufacture of lithium batteries, electrolyte batteries, secondary batteries, etc., can solve the problems of low ionic conductivity and low capacity, achieve large specific surface area, improve practicability, and high gram capacity Effect

Active Publication Date: 2016-01-20
SHANGHAI INST OF SPACE POWER SOURCES
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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 solve the problems of low ion conductivity and low capacity in the all-solid lithium battery system, and develop a new type of sulfur-based semi-solid lithium b

Method used

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  • Chalcogenide semi-solid lithium battery and preparing method thereof
  • Chalcogenide semi-solid lithium battery and preparing method thereof
  • Chalcogenide semi-solid lithium battery and preparing method thereof

Examples

Experimental program
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Example Embodiment

[0038] Example 1:

[0039] (1) Zeolite pretreatment: 10g sodium zeolite powder (AlNaO 6 Si 2 , Molecular weight 202.10) dispersed in 150-250ml 3M lithium nitrate (LiNO 3 ) In an aqueous solution, magnetically stirred at room temperature for 12-24 hours, then filtered under reduced pressure, washed with deionized water three times, dried and heat-treated in a muffle furnace at 400-450°C for 4 hours. The treated zeolite is high-energy dry ball milling at a speed of 400r / min for 2-8h to obtain white flour-like pretreated zeolite powder.

[0040] (2) Preparation of lithium salt polymer: weigh a certain mass of lithium trifluoromethanesulfonate (LiCF 3 SO 3 ), dispersed in polyethylene glycol 400 (PEG400) solvent, magnetically stirred for 12~24h, until lithium trifluoromethanesulfonate (LiCF 3 SO 3 ) Completely dissolved and obtain lithium trifluoromethanesulfonate (LiCF) with a viscosity of about 180~200mPa·S 3 SO 3 ) A polyethylene glycol 400 (PEG400) solution with a mass fraction of 6...

Example Embodiment

[0044] Example 2:

[0045] (1) Zeolite pretreatment: Disperse 10g ferrierite powder (FER) in 150-250ml lithium perchlorate (LiClO) with a concentration of 3M 4 ) In an aqueous solution, magnetically stirred at room temperature for 24 to 36 hours, then filtered under reduced pressure, washed with deionized water three times, dried and heat treated in a muffle furnace at 400 to 450°C for 4 hours for use. The treated zeolite is high-energy dry ball milling at a speed of 400r / min for 2-8h to obtain white flour-like pretreated zeolite powder.

[0046] (2) Preparation of lithium salt polymer: weigh a certain quality of lithium perchlorate (LiClO 4 ), dispersed in polyethylene glycol 400 (PEG400) solvent, magnetically stirred for 12~24h, until lithium perchlorate (LiClO 4 ) Is completely dissolved, and lithium perchlorate (LiClO) with a viscosity of about 160~200mPa·S is obtained. 4 ) A polyethylene glycol 400 (PEG400) solution with a mass fraction of 10-16wt%.

[0047] (3) Preparation of s...

Example Embodiment

[0050] Example 3:

[0051] (1) Zeolite pretreatment: 10g sodium zeolite powder (AlNaO 6 Si 2 , Molecular weight 202.10) dispersed in 150-250ml 3M lithium nitrate (LiNO 3 ) In the aqueous solution, magnetically stirred at room temperature for 12-24 hours, then filtered under reduced pressure, washed with deionized water three times, dried and heat-treated in a muffle furnace at 400-450°C for 4 hours. The treated zeolite is high-energy dry ball milling at a speed of 400r / min for 2-8h to obtain flour-like pretreated zeolite powder.

[0052] (2) Preparation of lithium salt polymer: weigh a certain mass of lithium trifluoromethanesulfonate (LiCF 3 SO 3 ), dispersed in polyethylene glycol 400 (PEG400) solvent, magnetically stirred for 12~24h, until lithium trifluoromethanesulfonate (LiCF 3 SO 3 ) Completely dissolved and obtain lithium trifluoromethanesulfonate (LiCF) with a viscosity of about 180~200mPa·S 3 SO 3 ) A polyethylene glycol 400 (PEG400) solution with a mass fraction of 6-12wt...

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Abstract

The invention discloses a chalcogenide semi-solid lithium battery and a preparing method thereof. The battery is formed by stacking a semi-solid chalcogenide positive electrode, a semi-solid electrolyte and a lithium wafer negative electrode. The semi-solid chalcogenide positive electrode is prepared through the process that firstly, a lithium-salt-containing polymer, a chalcogenide material and a carbon conductive agent are mixed into semi-solid, and then aluminum foil or a nickel net serves as a current collector. The semi-solid electrolyte is prepared by mixing porous inorganic oxide and a lithium-salt-containing polymer, wherein the lithium-salt-containing polymer is prepared by mixing a flow-state polymer and lithium salt. According to the composite type semi-solid electrolyte and the semi-solid chalcogenide positive electrode formed by compounding the lithium-salt-containing polymer and the chalcogenide material, the advantages that inorganic materials are high in mechanical strength and good in stability and the polymer materials are good in flexibility and interface contact, high in ionic conductivity and the like are combined, the ionic conductivity of the electrolyte and the energy storage stability of the chalcogenide positive electrode are improved, the first-time specific discharge capacity is 375 mAh/g, a discharging platform exceeds 2V, an energy storage mechanism is novel, and an energy storage power source with large potential is obtained.

Description

technical field [0001] The invention belongs to the technical field of novel all-solid-state lithium batteries in the field of energy storage batteries, and relates to a lithium battery, in particular to a method for preparing a sulfur-based semi-solid lithium battery. Background technique [0002] Among the next-generation lithium battery technologies and products replacing lithium-ion batteries, all-solid-state lithium batteries have attracted much attention. The all-solid lithium battery is a lithium secondary battery in which the current collector, positive and negative electrodes, and electrolytes are all made of solid materials. Compared with the existing lithium-ion batteries, the all-solid-state lithium battery system does not contain electrolyte at all, and the positive and negative plates do not contain binders and conductive agents. The structure is simple and compact, and the potential for energy density improvement is huge; Any liquid composition, so the all-so...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/38H01M4/60H01M4/62H01M4/13H01M4/137H01M4/139H01M4/1399H01M10/0565H01M10/052H01M10/058
CPCH01M4/13H01M4/137H01M4/139H01M4/1399H01M4/362H01M4/38H01M4/60H01M4/602H01M4/62H01M4/625H01M10/052H01M10/0565H01M10/058H01M2004/028H01M2300/0082Y02E60/10Y02P70/50
Inventor 田文生汤卫平吴勇民徐碇皓施斌
Owner SHANGHAI INST OF SPACE POWER SOURCES
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