2022
DOI: 10.48550/arxiv.2207.13073
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Three-dimensional operando optical imaging of single particle and electrolyte heterogeneities inside Li-ion batteries

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Cited by 5 publications
(10 citation statements)
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“…3D mapping is also possible through confocal imaging (under pseudo-steady-state electrochemical conditions), illustrated recently from the 3D diffusion layer build-up during enzymatic reactions . The instruments are sufficiently mature to tackle the transport of active species in real energy storage or conversion systems, such as porous electrodes for electrolyzers or batteries under operation.…”
Section: Optical Microscopies In Electrochemistrymentioning
confidence: 99%
See 1 more Smart Citation
“…3D mapping is also possible through confocal imaging (under pseudo-steady-state electrochemical conditions), illustrated recently from the 3D diffusion layer build-up during enzymatic reactions . The instruments are sufficiently mature to tackle the transport of active species in real energy storage or conversion systems, such as porous electrodes for electrolyzers or batteries under operation.…”
Section: Optical Microscopies In Electrochemistrymentioning
confidence: 99%
“…These differences are discussed based on the difference in conductivities in each state of the particle, which is then manifested locally . The method was extended to imaging in the presence of the usual electrode components (polymer binder and carbon paste) and developed to enable 3D probing inside the particles using confocal visualization . Complemented with 2-photon fluorescence excitation, the local distribution of the LiPF 6 electrolyte could be imaged around the particles, revealing inhomogeneous electrolyte diffusion as a result of the geometry and porosity of the carbon/binder matrix surrounding the particles.…”
Section: Optical Microscopies In Electrochemistrymentioning
confidence: 99%
“…3D mapping is also possible through confocal imaging (under pseudo steady-state electrochemical conditions) [378][379][380] , illustrated recently from the 3D diffusion layer build-up during enzymatic reactions. 381 The instruments are sufficiently mature to tackle the transport of active species in real energy storage or conversion systems, such as porous electrodes 382 for electrolysers or batteries [383][384][385] under operation.…”
Section: Probing Concentration Profilesmentioning
confidence: 99%
“…383 The method was extended to imaging in the presence of the usual electrode components (polymer binder and carbon paste) and developed to enable 3D probing inside the particles using confocal visualization. 385 Complemented with 2-photon fluorescence excitation, the local distribution of the LiPF6 electrolyte could be imaged around the particles, revealing inhomogeneous electrolyte diffusion as a result of the geometry and porosity of the carbon/binder matrix surrounding the particles.…”
Section: Probing Concentration Profilesmentioning
confidence: 99%
“…As such, we expect this approach will be a valuable label-free probe for ionic transport in a wide range of physical, chemical, and biological contexts, including product formation and collection in (photo)­electrochemical energy conversion, , water splitting, phototriggered ion transport, ion transport in soft matter, aqueous battery function, dissolution dynamics after proper calibration of the refractive index near saturation, microfluidic ion flow, bioelectronic device function, or even label-free electrophysiology dynamics . It could also be readily combined with established strategies to optically detect oxygen and hydrogen evolution, especially since the sensitivity required to see gaseous products is orders of magnitude lesser than what we have demonstrated for solution-phase species, and to potentially probe three-dimensional ion transport in such contexts. , Second, the MSE analysis used here could serve as a general approach to reveal nondiffusive behavior or spatially dependent transport parameters. Specifically, similar to the case for carrier transport probed by spatiotemporal methods, , deviations from diffusive transport manifest as nonlinear MSE curves that would be readily discerned.…”
mentioning
confidence: 99%