An integrated all-solid-state lithium metal battery

A lithium metal battery, all-solid-state technology, applied in the direction of lithium batteries, secondary batteries, battery electrodes, etc., can solve the problems of not using half-cell electrochemical performance, etc., achieve excellent electrochemical performance, improve ion conductivity, and good performance Effect

Inactive Publication Date: 2018-12-11
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In previous related studies, most of them only studied the enhancement of the conductivity of the electrolyte membrane by nanowire ceramics and the inhibition of lithium dendrites in the lithium symmetric battery, and did not apply it to the half-cell to study its electrochemical performance.

Method used

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  • An integrated all-solid-state lithium metal battery

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Embodiment 1

[0034] Such as figure 1As shown, this embodiment provides an integrated all-solid-state lithium metal battery, including a positive electrode 1, a negative electrode 2, and an organic-inorganic composite solid electrolyte 3 disposed between the positive electrode and the negative electrode. The negative electrode 2 is metal lithium, and the organic-inorganic composite solid state electrolyte The electrolyte 3 includes polyethylene oxide (PEO) and ceramic nanowires uniformly dispersed in the polyethylene oxide, and the binder in the positive electrode includes polyethylene oxide and lithium salt.

[0035] Wherein, the lithium salt is lithium bistrifluoromethanesulfonylimide (LITFSI), the ceramic nanowires are LLZO nanowires, in the organic-inorganic composite solid electrolyte, the ceramic nanowires account for 10% by mass, and the ceramic nanowires have a diameter of 50-500nm, ceramic nanowires are nanowires prepared by electrospinning process.

[0036] In the positive electr...

Embodiment 2

[0045] This embodiment provides an integrated all-solid-state lithium metal battery, including a positive electrode, a negative electrode, and an organic-inorganic composite solid electrolyte disposed between the positive electrode and the negative electrode. The negative electrode is metal lithium, and the organic-inorganic composite solid electrolyte includes polyethylene oxide (PEO ) and ceramic nanowires uniformly dispersed in polyethylene oxide, the binder in the positive electrode contains polyethylene oxide and lithium salt.

[0046] Wherein, the lithium salt is lithium bistrifluoromethanesulfonylimide (LITFSI), the ceramic nanowires are LLZO nanowires, in the organic-inorganic composite solid electrolyte, the ceramic nanowires account for 12% by mass, and the diameter of the ceramic nanowires is 50-500nm, ceramic nanowires are nanowires prepared by electrospinning process.

[0047] In the positive electrode binder, the molar ratio of ethylene oxide units to lithium is ...

Embodiment 3

[0056] This embodiment provides an integrated all-solid-state lithium metal battery, including a positive electrode, a negative electrode, and an organic-inorganic composite solid electrolyte disposed between the positive electrode and the negative electrode. The negative electrode is metal lithium, and the organic-inorganic composite solid electrolyte includes polyethylene oxide (PEO ) and ceramic nanowires uniformly dispersed in polyethylene oxide, the binder in the positive electrode contains polyethylene oxide and lithium salt.

[0057] Wherein, the lithium salt is lithium bistrifluoromethanesulfonylimide (LITFSI), the ceramic nanowires are LLZO nanowires, and in the organic-inorganic composite solid electrolyte, the ceramic nanowires account for 8% by mass, and the diameter of the ceramic nanowires is 50-500nm, ceramic nanowires are nanowires prepared by electrospinning process.

[0058] In the positive electrode binder, the molar ratio of ethylene oxide units to lithium ...

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Abstract

The invention belongs to the technical field of batteries, in particular to an integrated all-solid-state lithium metal battery, including the positive electrode, a negative electrode and an organic-inorganic composite solid electrolyte disposed between the positive electrode and the negative electrode, the negative electrode is made of metal lithium, the organic-inorganic composite solid electrolyte comprises polyethylene oxide, an electrolyte and ceramic nanowires uniformly dispersed in the polyethylene oxide, and an adhesive in the positive electrode comprises a mixture of the polyethyleneoxide and the electrolyte. Compared with the prior art, the organic-inorganic composite solid electrolyte with high ionic conductivity and high mechanical strength can be obtained by uniformly dispersing ceramic nanowires in polyethylene oxide (PEO); Furthermore, the binder in the cathode contains the mixture of polyethylene oxide and electrolyte, which effectively ensures the ion transport in the cathode and the good contact of the interface, so as to obtain the integrated all-solid-state lithium metal battery with high safety and excellent electrochemical performance.

Description

technical field [0001] The invention belongs to the technical field of batteries, and in particular relates to an integrated all-solid-state lithium metal battery. Background technique [0002] Lithium metal batteries are widely regarded as one of the most promising next-generation energy storage devices due to their high energy density. However, the liquid organic electrolyte commonly used in lithium metal batteries has serious safety hazards, such as liquid leakage, lithium dendrites piercing the separator and causing combustion or even explosion. In recent years, solid-state electrolytes have gradually attracted attention because their non-flammability can solve the safety problems caused by liquid electrolytes. However, the low ionic conductivity and poor mechanical strength of solid-state electrolytes limit the practical application of all-solid-state lithium metal batteries. [0003] A qualified all-solid-state lithium metal battery should have several properties: ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/056H01M4/62H01M10/058H01M10/052B82Y30/00
CPCB82Y30/00H01M4/622H01M10/052H01M10/056H01M10/058H01M2300/0065H01M2300/0091Y02E60/10Y02P70/50
Inventor 贺艳兵万子裴康飞宇沈璐郝晓鸽石凯李松李宝华杨全红
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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