Spatially resolved ultrasound diagnostics of Li-ion battery electrodes

Robinson, James B.; Maier, Maximilian; Alster, George; Compton, Tomos; Brett, Dan J. L.; Shearing, Paul R.

doi:10.1039/c8cp07098a

Cited by 82 publications

(49 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It also cannot probe inhomogeneity within the cell. Robinson et al 17 measured the ultrasonic properties at multiple positions across a cell and studied the nonuniformity of some structural features. However, such methods still suffer from a substantial lack of spatial resolution because the ultrasonic beam is usually too wide to resolve small structural features.…”

Section: Context and Scalementioning

confidence: 99%

Ultrasonic Scanning to Observe Wetting and “Unwetting” in Li-Ion Pouch Cells

Deng

Huang

Shen

et al. 2020

Joule

229

151

View full text Add to dashboard Cite

An ultrasonic imaging technique has been developed to investigate the internal changes of pouch cells nondestructively. The local ultrasonic transmittance of pouch cells has been measured and used for imaging with a new ultrasonic scanning machine designed and built in-house. The wetting process of the cells is clearly observed via such ultrasonic imaging techniques. Furthermore, ultrasonic transmission images of fresh cells and aged cells with different electrolytes and cycling conditions exhibit very different ultrasonic transmittance, which can be caused by electrolyte dry-out or ''unwetting'' due to cell swelling. The ultrasonic imaging technique is a very sensitive method to probe failure mechanisms in Li-ion pouch cells.

show abstract

Section: Context and Scalementioning

confidence: 99%

Ultrasonic Scanning to Observe Wetting and “Unwetting” in Li-Ion Pouch Cells

Deng

Huang

Shen

et al. 2020

Joule

229

151

View full text Add to dashboard Cite

show abstract

“…J.B. Robinson et al studied a commercial cell phone battery by successfully employing spatially resolved ultrasound acoustic measurement combined with X-ray computed tomography. [226] They demonstrated the applicability of this method for battery state of health measurement and also identified local cell construction glitches associated with anode tab. Z. Deng et al along with Jeff Dahn have successfully demonstrated cell wettability differences in pouch cells by employing ultrasonic scanning technology [227] .…”

Section: In Operando Acoustic Detection Of LI Metal Platingmentioning

confidence: 95%

Lithium Plating Detection Methods in Lithium-Ion Batteries

2020

View full text Add to dashboard Cite

Lithium-ion batteries provide a low-cost, long cycle-life and high energy density solution to the expediting energy requirement of the automotive industry. There is a growing need of fast charging batteries for commercial application. However, large charging currents may cause Lithium plating which describes the deposition of metallic Lithium at the anode surface. It takes place at conditions of high currents and/or low temperatures because of kinetic limitations. The main reason behind plating is the slow solid-state diffusion of Lithium ions inside the active material. If the anode surface potential falls below 0 V versus Li/Li+, the formation of metallic Lithium is thermodynamically feasible. To avoid or reduce the amount Lithium plating, it is essential to detect its onset during a charging event. Determination of accurate Lithium plating curve is crucial in estimating the boundary conditions for battery operation without compromising life and safety. There are various data analysis methods involved in deriving the Lithium plating curve: anode potential using a three-electrode cell, variation of relaxation voltage after charging (dV/dt), variation of accumulated charge with voltage (dQ/dV) and coulombic efficiency of charge/discharge with %SOC (state of charge) are more commonly employed techniques. In addition to these methods, estimation of its occurrence is typically underpinned by electrochemical models where the negative (anode) electrode potential is expressed by a set of partial differential equations based on the electrochemical and physical properties of the battery components such as the electrodes and electrolyte. The present paper reviews the common test methods and analysis that are currently utilized in Lithium plating determination. Knowledge gaps are identified, and recommendations are made for the future development in the determination and verification of Lithium plating curve in terms of modelling and analysis.

show abstract

“…Stress-strain relationships for lithium and lithium-ion systems have been extensively studied with classical tools of physical metallurgy, [105][106][107][108][109][110][111] and recently, acoustic analysis of such systems has revealed similar information in addition to structural mappings. 35,36,[112][113][114][115][116] For example, Chang et al showed the progression of lithiummetal deposition to dead lithium to gas formation in a multilayer stack. 35 In this case, the lithium metal showed itself not to be a danger because of rapid heating during a short circuit, but rather, because the reactive lithium metal is not stable in the context of the lithium-metal electrolyte, which causes excess chemical gassing and leads to physical disconnection (Figure 5).…”

Section: Mechanical Methodsmentioning

confidence: 99%

Thermophysical abuse couplings in batteries: From electrodes to cells

Steingart

2021

MRS Bulletin

View full text Add to dashboard Cite

Thermophysical couplings in batteries must be understood to ensure that batteries remain safe from potential immolation during operation. This article examines the ways in which thermophysical deformation of lithium-ion batteries can lead to explosions and other safety events and then provides a brief review of characterization methods to assess the behavior and results of such deformations. Finally, a recent example of an event “in the wild” is discussed and the mechanisms covered are applied to competing diagnoses of the failure.

show abstract

Spatially resolved ultrasound diagnostics of Li-ion battery electrodes

Abstract: This work describes the use of spatially acoustic techniques to identify the condition of electrodes in a commercial lithium-ion battery.

Cited by 82 publications

References 23 publications

Ultrasonic Scanning to Observe Wetting and “Unwetting” in Li-Ion Pouch Cells

Ultrasonic Scanning to Observe Wetting and “Unwetting” in Li-Ion Pouch Cells

Lithium Plating Detection Methods in Lithium-Ion Batteries

Thermophysical abuse couplings in batteries: From electrodes to cells

Contact Info

Product

Resources

About