Sulfur-based lithium-rich solid electrolyte and its preparation method and application

A solid electrolyte and lithium-rich technology, applied in the field of lithium batteries, can solve the problems of poor ion conductivity and stability, and achieve the effects of improving conductivity, reducing grain boundary impedance, excellent ion conductivity and stability

Active Publication Date: 2021-12-17
SVOLT ENERGY TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In view of this, the present invention aims to propose a sulfur-based lithium-rich solid electrolyte to solve the problems of poor ion conductivity and stability of existing solid electrolytes

Method used

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  • Sulfur-based lithium-rich solid electrolyte and its preparation method and application
  • Sulfur-based lithium-rich solid electrolyte and its preparation method and application
  • Sulfur-based lithium-rich solid electrolyte and its preparation method and application

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preparation example Construction

[0033] According to still another aspect of the present invention, the method for preparing a sulfur-based lithium-rich solid state electrolyte comprises: under an inert atmosphere, ball milling lithium halide and lithium sulfide and then calcining. The inventors found that lithium halide and lithium sulfide react effectively by ball milling lithium halide and lithium sulfide, grinding and vibrating the high-energy ball mill, and the high-speed rotating motion of the grinding ball collides with the raw material samples. At the same time, by assisting the high-temperature calcination process, the crystal is converted into a glass state to generate dipoles, and an amorphous glassy sulfur-based solid electrolyte can be obtained. The electrolyte synthesized by this method effectively reduces the grain boundary impedance of the solid electrolyte, thereby improving the conductivity of the solid electrolyte. Specifically, taking the reaction of lithium chloride and lithium sulfide as ...

Embodiment 1

[0044] In an argon atmosphere, 0.69gLi 2 S (purity 99.9%), 4.019gLiI (purity 99.9%) and 0.453gLi 2 O (purity 99%) three kinds of materials can obtain Li 6 OSI 2 , denoted as B1, its DSC curve is as follows figure 1 As shown, its XRD curve is as follows image 3 shown.

Embodiment 2

[0046] In an argon atmosphere, 0.69gLi 2 S (purity 99.9%), 4.019gLiI (purity 99.9%) and 0.453gLi 2 O (purity 99%) three kinds of materials can obtain Li 6 OSI 2 , denoted as B2, its DSC curve is as follows figure 1 As shown, its XRD curve is as follows image 3 shown.

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Abstract

The invention discloses a sulfur-based lithium-rich solid state electrolyte, a preparation method and application thereof. Wherein, the sulfur-based lithium-rich solid electrolyte includes wherein, 0≦x<3, 0≦a<1, M is at least one selected from Ba, Mg, Ca and Sr, and A is selected from Cl, I, Br and BF 4 at least one of the . The sulfur-based lithium-rich solid electrolyte has excellent ionic conductivity and stability.

Description

technical field [0001] The invention belongs to the technical field of lithium batteries, and in particular relates to a sulfur-based lithium-rich solid electrolyte and a preparation method and application thereof. Background technique [0002] Since the introduction of Sony's lithium-ion battery in 1991, the technology has been widely adopted, initially in electronics and more recently in the mobility and transportation industry. The current state-of-the-art can reach an energy density of 265Wh / kg, and can typically be cycled 2,000 to 4,000 times at an operating temperature between -20°C and 40°C and a charging duration of 1.5 hours. This cell consists of a graphite-based anode and a Ni / Co cathode separated by an insulating polymer separator. Lithium ions shuttle back and forth, plugging into the anode when charging and the cathode when discharging. The anode, separator and cathode have a porosity of about 35 percent to accommodate the liquid electrolyte, which allows lit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0562H01M10/052
CPCY02E60/10
Inventor 克劳迪乌·博格丹·布库尔王格日乐图谭宏亮
Owner SVOLT ENERGY TECHNOLOGY CO LTD
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