A platform for in situ Raman and stress characterizations of V2O5 cathode using MEMS device
نویسندگان
چکیده
We present an in situ approach for the characterization of lithium intercalation/deintercalation in thinfilm Li-ion battery electrodes. The method allows simultaneous measurement of microstructural changes during lithiation using micro-Raman (mRaman) spectroscopy in parallel with stress changes via optical interferometry. We observe evolution in the microstructure and stress in the various crystal phases in the Li-V-O system, including both reversible and irreversible phase transitions. We also correlate spectral shifts in certain Raman active modes with changes in the electrode stress, and thus confirm previously hypothesized origins of these observations. Ultimately, the combined stress/mRaman in situ technique can be leveraged as a characterization platform for a wide variety of electrode materials for advancing battery performance. © 2017 Elsevier Ltd. All rights reserved.
منابع مشابه
An in situ operando MEMS platform for characterization of Li-ion battery electrodes
This paper presents an in situ operando approach that allows characterization of lithium-ion battery electrodes. A MEMS sensor is designed and integrated with a commercially available Raman spectroscope to enable monitoring the stress and structural changes in the electrodes. An interferometric method with an enhanced image processing algorithm is applied for analyzing the crystal phase-depende...
متن کاملIn situ characterization of charge rate dependent stress and structure changes in V2O5 cathode prepared by atomic layer deposition
Investigated effects of varying C-rates on stress and structure changes in V2O5. A linear increase in the stress as a function of x in LixV2O5 is observed. C-rate does not directly contribute to larger intercalation stress. A rapid increase in disorder within LixV2O5 is correlated with higher Crate. a r t i c l e i n f o
متن کاملCatalyst Structure-Performance Relationship Identified by High-Throughput Operando Method: New Insight for Silica-Supported Vanadium Oxide for Methanol Oxidation
The reaction mechanism of methanol oxidation catalyzed by vanadium oxides on a silica support (V2O5/ SiO2) was investigated in a high-throughput operando reactor coupled with a Fourier transform-infrared (FT-IR) imaging system for rapid product analysis and six parallel, in situ Raman spectroscopy probes for catalyst characterization. Up to six V2O5/SiO2 catalysts with different vanadium loadin...
متن کاملDesign and Simulation of Hot Cathode Ionization Vacuum Gauge with no X-Ray Limitations
In this paper, the MEMS type ionization gauge with no X-Ray limitations has been presented. Having the dimensions of 2.4 mm× 0.8mm × 1.4 mm, the designed gauge is 9000 times smaller than the conventional type and can operate in HV and UHV pressures up to 5×10-9 torr. Operating at the temperature of 750°C, the cathode of proposed gauge is implemented using nickel and works in a way in...
متن کاملMicrometric Growth of V2O5Hexagonal Nano-plates as an Active Material for Lithium Ion Battery Cathode Electrode
This manuscript reports the synthesis of V2O5 nanostructures using reflux method, without using additives such as surface reactants. The influence of reaction parameters like temperature and concentration on the growth of nanostructures have been investigated. It has been observed that the nanostructures are formed with a hexagonal nano-plate morphology, grown from a common core. The diameter o...
متن کامل