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A kind of sulfur-based semi-solid lithium battery and preparation method thereof

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

Active Publication Date: 2018-08-03
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 battery by utilizing the characteristics of high ion conductivity and high sulfide capacity of fluid polymers. Improving the internal ionic conductivity and battery capacity of all-solid-state lithium batteries

Method used

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  • A kind of sulfur-based semi-solid lithium battery and preparation method thereof
  • A kind of sulfur-based semi-solid lithium battery and preparation method thereof
  • A kind of sulfur-based semi-solid lithium battery and preparation method thereof

Examples

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Effect test

Embodiment 1

[0039] (1) Zeolite pretreatment: 10 g sodium zeolite powder (AlNaO 6 Si 2 , molecular weight 202.10) dispersed in 150-250ml concentration of 3 M lithium nitrate (LiNO 3 ) aqueous solution, magnetic stirring at room temperature for 12-24 h, suction filtration under reduced pressure, washing with deionized water three times, drying and heat treatment in a muffle furnace at 400-450 °C for 4 h for later use. The treated zeolite was milled with a high-energy dry ball mill at a speed of 400 r / min for 2-8 h to obtain white flour-like pretreated zeolite powder.

[0040] (2) Preparation of lithium-containing salt polymer: weigh a certain mass of lithium trifluoromethanesulfonate (LiCF 3 SO 3 ), dispersed in polyethylene glycol 400 (PEG400) solvent, magnetically stirred for 12~24 h, to lithium trifluoromethanesulfonate (LiCF 3 SO 3 ) completely dissolved to obtain lithium trifluoromethanesulfonate (LiCF 3 SO 3 ) a polyethylene glycol 400 (PEG400) solution with a mass fraction of ...

Embodiment 2

[0045] (1) Zeolite pretreatment: Disperse 10 g of ferrierite powder (FER) in 150-250 ml of 3 M lithium perchlorate (LiClO 4 ) aqueous solution, magnetic stirring at room temperature for 24-36 h, suction filtration under reduced pressure, washing with deionized water three times, drying and heat treatment in a muffle furnace at 400-450 °C for 4 h for later use. The treated zeolite was milled with a high-energy dry ball mill at a speed of 400 r / min for 2-8 h to obtain white flour-like pretreated zeolite powder.

[0046] (2) Preparation of lithium-containing salt polymer: Weigh a certain mass of lithium perchlorate (LiClO 4 ), dispersed in polyethylene glycol 400 (PEG400) solvent, magnetically stirred for 12~24 h, to lithium perchlorate (LiClO 4 ) completely dissolved to obtain lithium perchlorate (LiClO 4 ) a polyethylene glycol 400 (PEG400) solution with a mass fraction of 10-16 wt%.

[0047] (3) Preparation of semi-solid electrolyte: pretreated zeolite and 10~16wt% lithium ...

Embodiment 3

[0051] (1) Zeolite pretreatment: 10 g sodium zeolite powder (AlNaO 6 Si 2 , molecular weight 202.10) dispersed in 150-250ml concentration of 3 M lithium nitrate (LiNO 3 ) aqueous solution, magnetic stirring at room temperature for 12-24 h, suction filtration under reduced pressure, washing with deionized water three times, drying and heat treatment in a muffle furnace at 400-450 °C for 4 h for later use. The treated zeolite was milled with a high-energy dry ball mill at a speed of 400 r / min for 2-8 h to obtain flour-like pretreated zeolite powder.

[0052] (2) Preparation of lithium-containing salt polymer: weigh a certain mass of lithium trifluoromethanesulfonate (LiCF 3 SO 3 ), dispersed in polyethylene glycol 400 (PEG400) solvent, magnetically stirred for 12~24 h, to lithium trifluoromethanesulfonate (LiCF 3 SO 3 ) completely dissolved to obtain lithium trifluoromethanesulfonate (LiCF 3 SO 3 ) a polyethylene glycol 400 (PEG400) solution with a mass fraction of 6-12 w...

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Abstract

The invention discloses a sulfur-based semi-solid lithium battery and a preparation method thereof. The battery is formed by stacking a semi-solid sulfur-based positive electrode, a semi-solid electrolyte and a lithium sheet negative electrode; , sulfur-based materials, and carbon conductive agent are mixed into a semi-solid, and then aluminum foil or nickel mesh is used as a current collector; the semi-solid electrolyte is a mixture of porous inorganic oxides and lithium-containing polymers; the lithium-containing polymer It is a mixture of flowable polymer and lithium salt. The composite semi-solid electrolyte provided by the invention and the semi-solid sulfur-based positive electrode compounded with lithium salt polymers and sulfur-based materials combine inorganic materials with high mechanical strength and good stability with polymer materials with good flexibility and good interface contact, Combining the advantages of high ionic conductivity, the ionic conductivity of the electrolyte and the energy storage stability of the sulfur-based positive electrode are improved. The specific capacity of the first discharge is 375 mAh / g, and the discharge platform exceeds 2V. The energy storage mechanism is novel and is a practical potential. Larger energy storage power supply.

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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Patent Type & Authority Patents(China)
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