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

Deng, Zhifang; Huang, Zhenkai; Shen, Yue; Huang, Yunhui; Ding, Han; Luscombe, Aidan; Johnson, Michel B.; Harlow, Jessie; Gauthier, Roby; Dahn, J. R.

doi:10.1016/j.joule.2020.07.014

Cited by 230 publications

(166 citation statements)

References 27 publications

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“… Quality control is an important step run through almost all the LIB manufacturing steps. The characterization methods can help to detect the defects early and prevent waste in the following steps ( Deng et al., 2020 ). However, it is hard to estimate the QC fail rate for the manufacturing innovations.…”

Section: Discussionmentioning

confidence: 99%

“…To achieve a lower cost and better visualization, Deng et al. applied ultrasonic scanning to observe the electrolyte distribution during the formation and aging process ( Deng et al., 2020 ). Depending on the characterization ability of gas generation by the ultrasonic scanning, they discovered that higher formation and aging temperature could exacerbate the electrolyte decomposition and lead to excessive SEI growth.…”

Section: Current Manufacturing Processes For Libsmentioning

confidence: 99%

“…With the help of neutron radiography, Gü nter et al visualized the electrolyte distribution in pouch cells and proposed a pressure cycle wetting procedure to accelerate the electrolyte wetting (Gü nter et al, 2019). To achieve a lower cost and better visualization, Deng et al applied ultrasonic scanning to observe the electrolyte distribution during the formation and aging process (Deng et al, 2020). Depending on the characterization ability of gas generation by the ultrasonic scanning, they discovered that higher formation and aging temperature could exacerbate the electrolyte decomposition and lead to excessive SEI growth.…”

Section: Formation and Agingmentioning

confidence: 99%

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Current and future lithium-ion battery manufacturing

et al. 2021

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Summary Lithium-ion batteries (LIBs) have become one of the main energy storage solutions in modern society. The application fields and market share of LIBs have increased rapidly and continue to show a steady rising trend. The research on LIB materials has scored tremendous achievements. Many innovative materials have been adopted and commercialized by the industry. However, the research on LIB manufacturing falls behind. Many battery researchers may not know exactly how LIBs are being manufactured and how different steps impact the cost, energy consumption, and throughput, which prevents innovations in battery manufacturing. Here in this perspective paper, we introduce state-of-the-art manufacturing technology and analyze the cost, throughput, and energy consumption based on the production processes. We then review the research progress focusing on the high-cost, energy, and time-demand steps of LIB manufacturing. Finally, we share our views of challenges in LIB manufacturing and propose future development directions for manufacturing research in LIBs.

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Section: Discussionmentioning

confidence: 99%

Section: Current Manufacturing Processes For Libsmentioning

confidence: 99%

Section: Formation and Agingmentioning

confidence: 99%

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Current and future lithium-ion battery manufacturing

et al. 2021

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“…[ 25 ] To investigate the gassing behavior of LMBs, we carried out ultrasonic transmission mapping using the ultrasonic imaging technique developed by our group. [ 26 ] LFP/Li pouch cell was used for scanning since LFP cathode is usually very stable with no gas generation. The gassing mainly arises from the decomposition of electrolyte on Li anode, and it can be observed from the change in ultrasonic transmissivity.…”

Section: Figurementioning

confidence: 99%

Polycationic Polymer Layer for Air‐Stable and Dendrite‐Free Li Metal Anodes in Carbonate Electrolytes

et al. 2021

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Figure 3. a) N 1s and b) F 1s XPS spectra of SEI formed on the PDDA-TFSI@Cu, poly(EVIm-TFSI)@Cu, PDMA-TFSI@Cu, and bare Cu electrodes. c) Nucleation overpotentials of Li deposition on bare Cu electrode and the PIL-coated electrodes. d) Coulombic efficiency of Li/Cu half-cells using the bare Cu electrode and the PIL-coated electrodes at 0.5 mA cm −2 with a plating capacity of 1 mAh cm −2. e,f) Potential profiles of various electrodes at the 50th (e) and 100th (f) cycles.

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“…Finally, ultrasonic scanning technique developed by our group is performed to monitor the gas generation process inside pouch cells. [ 24 ] The transmitted ultrasonic signal is significantly reduced at gas–liquid or gas–solid interfaces due to the enlarged interfacial impedance. The ultrasonic transmission is transformed into a red‐to‐blue heat map, and low transmission, represented by the blue color, indicates gassing behavior.…”

Section: Resultsmentioning

confidence: 99%

Composite Lithium Metal Anodes with Lithiophilic and Low‐Tortuosity Scaffold Enabling Ultrahigh Currents and Capacities in Carbonate Electrolytes

Rao

Liu

et al. 2020

Adv Funct Materials

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The practical application of lithium metal anode has been hindered by safety and cyclability issues due to the uncontrollable dendrite growth, especially during fast cycling and deep plating/stripping process. Here, a composite Li metal anode supported by periodic, perpendicular, and lithiophilic TiO 2 / poly(vinyl pyrrolidone) (PVP) nanofibers via a facial rolling process is reported. TiO 2 /PVP nanofibers with good Li affinity provide low-tortuosity and directly inward Li + transport paths to facilitate Li nucleation and deposition under high areal capacities and current densities. The micrometer-scale interspaces between TiO 2 /PVP walls offer enough space to circumvent the huge volume variation and avoid structure collapsing during the repeated deep Li plating/stripping. The unique structure enables stable cycling under ultrahigh currents (12 mA cm −2), and ultra-deep plating/stripping up to 60 mAh cm −2 with a long cycle life in commercial carbonate electrolytes. The gassing behavior in operating pouch cells is observed using ultrasonic transmission mapping. When paired with LiFePO 4 (5 mAh cm −2), sulfur (3 mAh cm −2), and high-voltage LiNi 0.8 Co 0.1 Mn 0.1 O 2 cathodes, the composite Li anodes deliver remarkably improved rate performance and cycling stability, demonstrating that it could be a promising strategy for balancing high-energy density and high-power density in Li metal batteries.

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

Cited by 230 publications

References 27 publications

Current and future lithium-ion battery manufacturing

Current and future lithium-ion battery manufacturing

Polycationic Polymer Layer for Air‐Stable and Dendrite‐Free Li Metal Anodes in Carbonate Electrolytes

Composite Lithium Metal Anodes with Lithiophilic and Low‐Tortuosity Scaffold Enabling Ultrahigh Currents and Capacities in Carbonate Electrolytes

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