Enhanced homogeneity of electrochemical reaction via low tortuosity enabling high-voltage nickel-rich layered oxide thick-electrode

Li, Shuping; Tian, Gangling; Xiong, Ruoyu; He, Renjie; Chen, Shaoqing; Zhou, Huamin; Wu, Yuanke; Han, Zhilong; Yu, Chuang; Cheng, Shijie; Xie, Jia

doi:10.1016/j.ensm.2022.01.035

“…Concentration polarization is not as clearly understood as ohmic and charge transfer polarization because it occurs only under non‐equilibrium conditions during the redox process and is not readily measurable by electrochemical impedance spectroscopy [20] . Severe concentration polarization aggravates the inhomogeneity of electrochemical reactions, leads to undesired side reactions, and lowers the Faraday current efficiency [21] . The cyclic renewal of the electrode–solution interface, particularly the diffusion layer, is a viable technique for suppressing concentration polarization because it is advantageous for breaking down the barrier of the interfacial concentration gradient [22] …”

Section: Figurementioning

confidence: 99%

In Operando Visualization and Dynamic Manipulation of Electrochemical Processes at the Electrode–Solution Interface

Xin

¹

,

Wang

²

,

Zhang

³

et al. 2022

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Revealing the dynamic processes at the electrode–solution interface is imperative for understanding electrochemical phenomena. Most techniques have been developed to sense the electrode surface changes at the nanoscale, but provide limited information on potential‐induced interfacial ion redistribution at the mesoscale. Herein, we present an in operando visualization method utilizing a microfabricated electrochemical cell combined with a laser scanning confocal microscope to observe high‐resolution and fast‐response interfacial processes. We report potential‐induced formation and transformation of the Nernst diffusion layer, demonstrating that pulsed voltage dynamically perturbs the interface and promotes ion diffusion. This provides an additional insight into developing a dynamic manipulation method to control the electrochemical process. Our novel visualization method can easily be applied to monitor different ionic behaviors in electrochemical reactions at the mesoscale.

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“…S23 † demonstrate the uniform distribution of active materials with fewer voids at the electrode level, promoting a more homogeneous reaction and resulting in superior life performance. 51 The mixed NCM811 also showed excellent rate characteristics as well as good lifetime characteristics. As shown in Fig.…”

Section: Selective Lithium Extraction Of Spent Linimentioning

confidence: 92%

Upcycling spent cathodes into single-crystalline Ni-rich cathode materials through selective lithium extraction

Kim,

Jeon,

Song

et al. 2023

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“…Faraday current efficiency. [21] The cyclic renewal of the electrode-solution interface, particularly the diffusion layer, is a viable technique for suppressing concentration polarization because it is advantageous for breaking down the barrier of the interfacial concentration gradient. [22] Pulsed voltages were employed to regulate the interfacial ion transport through periodic variations in the electric field and interphase charge transfer.…”

Section: Zuschriftenmentioning

confidence: 99%

In Operando Visualization and Dynamic Manipulation of Electrochemical Processes at the Electrode–Solution Interface

Xin

¹

,

Wang

²

,

Zhang

³

et al. 2022

View full text Add to dashboard Cite

Revealing the dynamic processes at the electrode–solution interface is imperative for understanding electrochemical phenomena. Most techniques have been developed to sense the electrode surface changes at the nanoscale, but provide limited information on potential‐induced interfacial ion redistribution at the mesoscale. Herein, we present an in operando visualization method utilizing a microfabricated electrochemical cell combined with a laser scanning confocal microscope to observe high‐resolution and fast‐response interfacial processes. We report potential‐induced formation and transformation of the Nernst diffusion layer, demonstrating that pulsed voltage dynamically perturbs the interface and promotes ion diffusion. This provides an additional insight into developing a dynamic manipulation method to control the electrochemical process. Our novel visualization method can easily be applied to monitor different ionic behaviors in electrochemical reactions at the mesoscale.

show abstract

Enhanced homogeneity of electrochemical reaction via low tortuosity enabling high-voltage nickel-rich layered oxide thick-electrode

Cited by 36 publications

References 52 publications

In Operando Visualization and Dynamic Manipulation of Electrochemical Processes at the Electrode–Solution Interface

In Operando Visualization and Dynamic Manipulation of Electrochemical Processes at the Electrode–Solution Interface

Upcycling spent cathodes into single-crystalline Ni-rich cathode materials through selective lithium extraction

In Operando Visualization and Dynamic Manipulation of Electrochemical Processes at the Electrode–Solution Interface

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