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A tin-based fluoride msnf 4 Preparation method of room temperature solid fluoride ion battery with layered fluoride ion electrolyte

A technology of fluoride ions and fluorides, applied in battery electrodes, secondary batteries, circuits, etc., to achieve the effects of simple preparation process, simplified preparation process, and high working temperature

Active Publication Date: 2022-06-24
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Layered tin-based fluoride MSnF 4 (M=Pb, Ba, Sr) has attracted much attention because of its high fluoride ion conductivity at room temperature, PbSnF 4 and BaSnF 4 The fluoride ion conductivity at room temperature reaches 1×10 -3 and 1×10 -4 S cm -1 , however, these fluoride-ion electrolytes with high ionic conductivity have not been applied to solid-state fluoride-ion batteries (FIBs)

Method used

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  • A tin-based fluoride msnf <sub>4</sub> Preparation method of room temperature solid fluoride ion battery with layered fluoride ion electrolyte
  • A tin-based fluoride msnf <sub>4</sub> Preparation method of room temperature solid fluoride ion battery with layered fluoride ion electrolyte
  • A tin-based fluoride msnf <sub>4</sub> Preparation method of room temperature solid fluoride ion battery with layered fluoride ion electrolyte

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Weigh 5.2805g BaF respectively 2 and 4.7195g SnF 2 , Under the protection of argon, the ball milling speed is 600rpm, the ball milling time is 20h, and the obtained ball milling product is dried at 80°C for 10h. figure 1 (a) BaSnF prepared by high-energy ball milling in this example 4 XRD pattern of the precursor powder. The obtained dried product was sintered under the protection of nitrogen gas, the sintering temperature was 300 °C, and the heating rate was 6 °C min -1 , the sintering time was 3h, and BaSnF was obtained 4 Electrolyte powder. figure 1 BaSnF prepared before and after sintering in this example 4XRD pattern of the electrolyte powder. BaSnF before sintering 4 Electrolyte powder XRD ( figure 1 (a)) represent (102), (110), (200) and (212) characteristic peaks at 2θ=24.84°, 28.88°, 41.44° and 48.91°, respectively, which indicate the BaSnF before sintering 4 The electrolyte powder has a cubic phase structure. BaSnF after sintering 4 Electrolyte powd...

Embodiment 2

[0030] Weigh 6.0889g PbF respectively 2 and 3.9112g SnF 2 , Under nitrogen protection, the ball milling speed is 800rpm, the ball milling time is 15h, and the obtained ball milling product is dried at 60°C for 14h. figure 2 (a) PbSnF prepared by high-energy ball milling in this example 4 XRD pattern of the precursor powder. The obtained dried product was sintered under the protection of argon gas, the sintering temperature was 450 °C, and the heating rate was 3 °C min -1 , the sintering time is 2h, and the PbSnF 4 Electrolyte powder. figure 2 (b) PbSnF prepared after sintering in this example 4 XRD pattern of the electrolyte powder. PbSnF before and after sintering 4 XRD patterns of electrolyte powder and BaSnF 4 The same characteristic peak differentiation of the electrolyte powder, by comparison with the standard card, indicates that PbSnF 4 The electrolyte powder is a tetragonal phase before sintering, and an orthorhombic phase after sintering. image 3 (e) PbSn...

Embodiment 3

[0032] Weigh 0.8g BiF respectively 3 , 0.2g carbon nanotubes and 1.0g BaSnF 4 or PbSnF 4 , under the protection of nitrogen, the ball milling speed is 200rpm, the ball milling time is 2h, and the obtained ball milling product is dried at 60 ℃ for 3h to prepare BiF 3 Composite cathode material. in image 3 (a) BiF of this embodiment 3 / BaSnF 4 / SEM image of carbon nanotube composite cathode material, image 3 (d) BiF of this embodiment 3 / PbSnF 4 SEM image of carbon nanotube composite cathode material. The SEM image shows that the electrolyte, electrode material and carbon nanotubes are uniformly distributed. Weigh 1.0g Sn, 0.2g carbon nanotubes and 0.8g BaSnF respectively 4 or PbSnF 4 , under the protection of argon, the ball milling speed is 150rpm, the ball milling time is 4h, the obtained ball milling product is dried at 70℃ for 2h, and the Sn composite negative electrode material is prepared. in image 3 (c) Sn / BaSnF of this embodiment 4 / SEM image of carbo...

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Abstract

The invention discloses a tin-based fluoride MSnF 4 A method for preparing a room-temperature solid-state fluoride-ion battery with a layered fluoride-ion electrolyte. The present invention will MF 2 (M=Pb, Ba, Sr) and SnF 2 Mixed, tin-based fluoride MSnF with layered structure prepared by high energy ball milling combined with sintering 4 Fluoride ion electrolyte powder materials, electrolyte sheets are prepared by cold pressing or hot pressing, and electrolyte powder materials are combined with active electrode materials to prepare composite electrode materials for fluoride ion batteries, which have been successfully applied to room temperature solid fluoride ion batteries. The fluoride ion electrolyte obtained in the present invention has a fluoride ion conductivity as high as 1 to 8×10 at room temperature ‑4 S cm ‑1 , the obtained battery has strong stability to water and air, and has good charge-discharge cycle stability. Application range of fluoride ion batteries.

Description

technical field [0001] The invention relates to new energy materials, in particular to a tin-based fluoride MSnF 4 Preparation of room temperature solid-state fluoride ion batteries (FIBs) with layered fluoride ion electrolytes. Background technique [0002] With the ever-increasing energy demand and the gradual depletion of existing fossil resources, currently environmentally friendly, high-safety, high-energy-density, and low-cost rechargeable and dischargeable battery systems are being intensively researched as energy storage solutions. In recent years, among many new battery systems, solid-state fluoride-ion batteries (FIBs) have been favored by researchers due to their high theoretical energy density and high safety. Fluoride ion battery via anion F - Shuttle in fluoride ion conductor to realize energy conversion between positive and negative electrodes, F - It is the carrier during the charging and discharging process, and its theoretical energy density is as high a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/583H01M4/62H01M4/38H01M10/054
CPCH01M4/362H01M4/582H01M4/583H01M4/625H01M4/38H01M10/054Y02E60/10
Inventor 王先友刘磊刘敏李晓龙余睿智陈曼芳阳立邵鼎盛罗凯丽
Owner XIANGTAN UNIV
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