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a lial 5 o 8 Nanowire preparation method, composite solid electrolyte, lithium metal battery

A solid electrolyte, lithium metal battery technology, applied in the preparation of LiAl5O8 nanowires, composite solid electrolyte, lithium metal battery field, can solve problems such as difficulty in preparation and destruction of LiAl, achieve low cost, improve long cycle stability and rate performance , to avoid the effect of interface damage

Active Publication Date: 2021-12-07
SUN YAT SEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, without effective regulation, these serious side effects can destroy the LiAl 5 o 8 Interfacial contact between solid electrolyte and electrodes
In fact, LiAl 5 o 8 The above-mentioned side reactions have not been confirmed in the experiment, because the traditional solid-state sintering method is difficult to prepare the material [28]

Method used

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  • a lial <sub>5</sub> o <sub>8</sub> Nanowire preparation method, composite solid electrolyte, lithium metal battery
  • a lial <sub>5</sub> o <sub>8</sub> Nanowire preparation method, composite solid electrolyte, lithium metal battery
  • a lial <sub>5</sub> o <sub>8</sub> Nanowire preparation method, composite solid electrolyte, lithium metal battery

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Embodiment 1

[0076] The following provides a LiAl 5 o 8 The preparation method of nanowire film, its preparation process is as follows figure 1 As shown, the specific preparation method comprises the following steps:

[0077] (1) Preparation of Al(EtO) 3 Nanowire gel: Al(EtO) 3 The preparation of nanowire gel can refer to D. Lei, J. Benson, A. Magasinski, G. Berdichevsky, G. Yushin, Science 2017, 355, 267. Specifically, a graphite crucible containing aluminum powder (0.3g) and Li block (0.085g) (1:1 atomic ratio) was placed behind the muffle furnace, heated at 800°C for 30min, and cooled naturally to obtain a piece of Li- Al alloy sheet. The Li-Al alloy sheet was polished in a glove box filled with argon, and the polished Li-Al alloy sheet (0.1105g) was reacted with ethanol (20mL) at 60°C for 30h to obtain Al(EtO) 3 nanowire gel.

[0078] (2) Preparation of LiAl 5 o 8 Nanowire film: on Al(EtO) 3 The nanowire gel was suction filtered, leaving a layer of Al(EtO) on the filter paper...

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Abstract

The invention discloses a LiAl 5 o 8 Preparation method of nanowire, composite solid electrolyte, lithium metal battery, said LiAl 5 o 8 The preparation method comprises the following steps: to Al(EtO) 3 The nanowires were pre-calcined, and then the pre-calcined Al(EtO) 3 The nanowire film is immersed in the lithium ion solution; after the immersion, solid-liquid separation is performed to obtain Al(EtO) supplemented with lithium 3 nanowires; calcining the lithium-supplemented Al(EtO) 3 nanowires, to obtain LiAl 5 o 8 Nanowires. By LiAl of the present invention 5 o 8 Composite solid electrolytes made of nanowires can guide Li + Depositing in the form of lamellar rather than dendrite can significantly improve the long-term cycle stability and rate performance of lithium metal batteries.

Description

technical field [0001] The invention relates to the technical field of battery materials, in particular to a LiAl 5 o 8 Nanowire preparation method, composite solid electrolyte, lithium metal battery. Background technique [0002] The rapid development of portable electronics, electric vehicles, and energy storage grids has driven the development of secondary batteries with high energy density. Lithium metal batteries, because the lithium metal (Li) negative electrode has a high theoretical specific capacity (3860mAh g -1 ), low density (0.59g·cm -3 ) and low reduction potential (-3.04V relative to the standard hydrogen potential), making it a promising high specific energy density secondary battery [1] . However, the unstable electrolyte film (SEI film) and uncontrolled growth of dendrites in liquid organic electrolytes severely limit the development of lithium metal batteries for practical applications. First, lithium metal suffers severe volume changes during deposi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0562H01M10/0525B82Y40/00
CPCY02E60/10
Inventor 雷丹妮吴圆王成新
Owner SUN YAT SEN UNIV