Chip-based micro-electrochemical cell in-situ multi-field analysis testing device, method and application

Abstract

The invention discloses an in-situ multi-field analysis testing device and method for a chip-based micro-electrochemical cell and application, and belongs to the technical field of in-situ electricity / electrochemistry / optical testing and mechanism research of chemistry, materials and energy. Comprising a reaction tank main body, a porous transparent plate and a sample table, electrolyte is contained in an annular groove of the reaction tank main body, a transparent plate with holes covers the electrolyte groove, and a central hole of the transparent plate is used as an observation window; the chip-based micro-electrochemical cell is pressed on the lower surface of the perforated transparent plate through a sample table, and the chip-based micro-electrochemical cell and the perforated transparent plate pass through a hydrophobic gasket; the reference electrode and the counter electrode are respectively arranged in the reference electrode connecting hole and the counter electrode connecting hole through waterproof threading bolts, one ends of the reference electrode and the counter electrode are in contact with the electrolyte, and the other ends are externally connected with an electrochemical workstation; one end of the lead is connected with the sample micro-area of the chip-based micro-electrochemical cell, and the other end is externally connected with an electrochemical workstation. According to the invention, in-situ electrical / electrochemical / optical multi-field analysis can be carried out at the same time, time is saved, operation is simple and convenient, and the test success rate is high.

Description

technical field [0001] The invention belongs to the technical field of in-situ electrical / electrochemical / optical testing and mechanism research of chemistry, materials and energy, and specifically relates to an in-situ multi-field analysis and testing device, method and application of a chip-based micro-electrochemical cell. Background technique [0002] As the most critical part of battery components, electrode materials play a decisive role in the performance of batteries. Researchers cannot simply apply the relevant electrochemical reaction models or theories in batteries to explain the behavior and phenomena of electrode material reactions. Therefore, it is urgent to observe the morphology and structural changes of battery electrode materials during the electrochemical process on a microscopic scale, and to deeply understand the electrochemical mechanism of electrode materials. To study the electrochemical mechanism of microscopic scale, conventional electrochemical char...

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Problems solved by technology

[0004] At present, there have been many reports on the structural design of the in-situ analysis cell, including electrochemical testing and spectral testing, such as patent CN112285173A, but the in-situ test cell cannot be used for microscopic In-situ detection of scale electrode materials, and as a device built into the Raman system, the requirements for testing and installation are high, and the instrument universality is low

Another example is literature (Zou J, Li F, Bissett M A, et al. Intercalation behavior of Li and Na into 3-layer and multilayer MoS 2 Although the in-situ reaction cell in flakes[J].Electrochimica Acta,2020,331,135284.) can be used for microscale material testing, it is not suitable for chip-based microelectrochemical cells prepared by conventional methods (such as patent CN112357878A) The test, which requires pouring copper foil through polyvinylidene fluoride binder and ultrafine apatite, and assembling microcrystalline MoS in an argon-filled glove box 2 Thin sheet electrodes, the operation and preparation process is time-consuming and demanding, and the reaction cell cannot be applied to water-based electrolyte systems

[0005] At the same time, none of these reported in-situ test equipment can realize the three characterizations of electrochemical, electrical and spectral analysis at the same time

The study of electrochemical mechanism is not only in the field of chemistry, but the comprehensive application of interdisciplinary subjects is very important. At present, there is no in-situ integrated electrical / electrochemical / optical characterization suitable for water-based electrolyte systems and micro-scale mechanism research on the market. The device provides a strong support for the mechanism research in the reaction process, so the technology in this field needs to be improved urgently

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