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Method for in-situ analyzing charging-discharging transport mechanism of Li<+> ions or Na<+> ions in nanowire

An in-situ analysis, nanowire technology, applied in the field of nanomaterials and electrochemistry, can solve the problems of lack of diversity in open battery device design, nanowires cannot be immersed, and insufficient electrochemical analysis.

Active Publication Date: 2015-06-24
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this technology has certain limitations such as: first, when the nanowire is placed in a high-vacuum TEM environment, its electrochemical process is different from that of a real battery with a traditional organic liquid electrolyte; second , the design of open battery devices lacks diversity, and the nanowires cannot be completely submerged in the liquid electrolyte as in real electrolytes; most importantly, it can only observe the changes in the shape and structure of the nanowires, which have great influence on the electrical Chemical analysis is not enough

Method used

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  • Method for in-situ analyzing charging-discharging transport mechanism of Li&lt;+&gt; ions or Na&lt;+&gt; ions in nanowire
  • Method for in-situ analyzing charging-discharging transport mechanism of Li&lt;+&gt; ions or Na&lt;+&gt; ions in nanowire
  • Method for in-situ analyzing charging-discharging transport mechanism of Li&lt;+&gt; ions or Na&lt;+&gt; ions in nanowire

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Embodiment 1

[0032] In situ analysis of Li + ion or Na + A new method for the charge-discharge transport mechanism of ions in nanowires, which includes the following steps:

[0033] 1) Put V 3 o 7 The nanowire positive electrode 5 and the highly oriented pyrolytic graphite film negative electrode 4 are dispersedly deposited on the surface with a layer of 300nm thick SiO 2 on the silicon substrate 1, where V 3 o 7 The nanowires are prepared by the hydrothermal method, and the highly oriented pyrolytic graphite film is prepared by the mechanical exfoliation method;

[0034] 2) Using techniques such as electron beam lithography in V 3 o 7 Cr (5nm) and Au (150nm) metal electrodes are made at the quintile point of the nanowire and at both ends of the highly oriented pyrolytic graphite film as current collectors (such as figure 2 shown);

[0035] 3) Coating photoresist SU82002, and using electron beam etching technology to make the photoresist cover the metal electrode current collecto...

Embodiment 2

[0040] In situ analysis of Li + ion or Na + A new method for the charge-discharge transport mechanism of ions in nanowires, which includes the following steps:

[0041] 1) Put V 3 o 7 Nanowire positive electrode and highly oriented pyrolytic graphite film negative electrode are dispersedly deposited on the surface with a layer of 300nm thick SiO 2 on the silicon substrate, where V 3 o 7 The nanowires are prepared by the hydrothermal method, and the highly oriented pyrolytic graphite film is prepared by the mechanical exfoliation method;

[0042] 2) Using techniques such as electron beam lithography in V 3 o 7 Cr (5nm) and Au (150nm) metal electrodes are made at the quintile point of the nanowire and at both ends of the highly oriented pyrolytic graphite film as current collectors (such as Figure 6 shown);

[0043] 3) Coating photoresist SU82002, and using electron beam etching technology to make the photoresist cover the metal current collector as a protective layer;...

Embodiment 3

[0049] In situ analysis of Li + ion or Na + A new method for the charge-discharge transport mechanism of ions in nanowires, which includes the following steps:

[0050] 1) Put V 3 o 7 Nanowire positive electrode and highly oriented pyrolytic graphite film negative electrode are dispersedly deposited on the surface with a layer of 300nm thick SiO 2 on the silicon substrate, where V 3 o 7 The nanowires are prepared by the hydrothermal method, and the highly oriented pyrolytic graphite film is prepared by the mechanical exfoliation method;

[0051] 2) Using techniques such as electron beam lithography in V 3 o 7 Cr (5nm) and Au (150nm) metal electrodes are made at the quintiles of the nanowires and at both ends of the highly oriented pyrolytic graphite film as current collectors;

[0052] 3) Coating photoresist SU82002, and using electron beam etching technology to make the photoresist cover the metal current collector as a protective layer;

[0053] 4) Use polydimethyls...

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Abstract

The invention relates to a method for in-situ analyzing a charging-discharging transport mechanism of Li<+> ions or Na<+> ions in a nanowire. The method comprises the following steps: 1) dispersing a nanowire positive electrode or a nanowire negative electrode or a nano film negative electrode on a substrate; 2) producing a multi-contact metal electrode current collector on the nanowire positive electrode, and producing a metal electrode current collector respectively on each of two ends of the nanowire negative electrode or the nano film negative electrode; 3) producing a protection layer on each metal electrode current collector; 4) covering the nanowire positive electrode with the protection layer, and only exposing one end or completely exposing the nanowire to be used as an electrode model; and 5) sealing devices, injecting organic liquid electrolyte, completing the assembling of a multi-current-collector single nanowire electrochemical device, and testing and representing the performance of the multi-current-collector fluid single nanowire electrochemical device. The method has beneficial effects that a platform is provided for researching the correlation of the structure, electric transportation and electrochemical performance of a nanowire electrochemical device material and diagnosing a battery.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials and electrochemistry, and in particular relates to an in-situ analysis of Li + ion or Na + Approaches to charge-discharge transport mechanisms of ions in nanowires. Background technique [0002] Lithium-ion batteries play an indispensable role in high-performance energy storage devices, but its low element abundance and high price make people want to develop Na-ion batteries, because Na-ions can be layered like Li-ions. Reversible intercalation and deintercalation in materials, some materials with open lattice structures that allow lithium ion intercalation are also suitable for sodium ion intercalation. Therefore, due to their similar chemical properties in many aspects, many works have compared the similarities and differences of Li-ion and Na-ion energy storage systems. However, such comparisons mainly focus on battery performance, such as specific capacity, operating voltage, cycle li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/26G01N23/22
Inventor 麦立强晏梦雨双逸许絮
Owner WUHAN UNIV OF TECH
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