Gradient Solid Electrolyte Interphase and Lithium ion Solvation Regulated by Bisfluoroacetamide for Stable Lithium Metal Batteries

2020 ◽  
Author(s):  
Jianmin Ma ◽  
Fang Li ◽  
Jian He ◽  
Jiandong Liu ◽  
Mingguang Wu ◽  
...  
Keyword(s):  
Solid Electrolyte ◽  
Solid Electrolyte Interphase ◽  
Lithium Ion ◽  
Ion Solvation ◽  
Lithium Metal ◽  
Lithium Metal Batteries

scholarly journals The Importance of Interphases in Energy Storage Devices: Methods and Strategies to Investigate and Control Interfacial Processes

Physchem ◽  
2021 ◽  
Vol 1 (1) ◽  
pp. 26-44
Author(s):  
Chiara Ferrara ◽  
Riccardo Ruffo ◽  
Piercarlo Mustarelli
Keyword(s):  
Energy Storage ◽  
Solid Electrolyte Interphase ◽  
Lithium Ion ◽  
Lithium Metal ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Lithium Metal Batteries ◽  
And Control ◽  
Near Future

Extended interphases are playing an increasingly important role in electrochemical energy storage devices and, in particular, in lithium-ion and lithium metal batteries. With this in mind we initially address the differences between the concepts of interface and interphase. After that, we discuss in detail the mechanisms of solid electrolyte interphase (SEI) formation in Li-ion batteries. Then, we analyze the methods for interphase characterization, with emphasis put on in-situ and operando approaches. Finally, we look at the near future by addressing the issues underlying the lithium metal/electrolyte interface, and the emerging role played by the cathode electrolyte interphase when high voltage materials are employed.

scholarly journals Solvation Rule for Solid‐Electrolyte Interphase Enabler in Lithium‐Metal Batteries

2020 ◽  
Vol 59 (41) ◽  
pp. 18229-18233 ◽  
Author(s):  
Chi‐Cheung Su ◽  
Meinan He ◽  
Jiayan Shi ◽  
Rachid Amine ◽  
Jian Zhang ◽  
...  
Keyword(s):  
Solid Electrolyte ◽  
Solid Electrolyte Interphase ◽  
Lithium Metal ◽  
Lithium Metal Batteries

scholarly journals High transference number enabled by sulfated zirconia superacid for lithium metal batteries with carbonate electrolytes

2020 ◽  
Author(s):  
Sang-Gil Woo ◽  
Eun-Kyoung Hwang ◽  
Hee-Kook Kang ◽  
Haeun Lee ◽  
Je-Nam Lee ◽  
...  
Keyword(s):  
Sulfated Zirconia ◽  
Solid Electrolyte Interphase ◽  
Lithium Ion ◽  
Transference Number ◽  
Operating Conditions ◽  
Interfacial Instability ◽  
Lithium Metal ◽  
Lithium Metal Batteries ◽  
Lithium Dendrites ◽  
Battery Technology

Abstract The prospect of increasing the energy density has promoted research on lithium metal batteries. Yet, avoiding the uncontrolled growth of lithium dendrites and the resulting interfacial instability to ensure the practical viability of the given battery technology remains a considerable challenge. Here, we report coating the separator with sulfated zirconia superacid to achieve a high lithium ion transference number of 0.92 and compelling cycle life when a full-cell paired with a LiNi0.82Co0.07Mn0.11O2 cathode was tested in a carbonate electrolyte under practical operating conditions. The exceptionally high transference number is attributed to strengthened binding of the PF6− anion of the lithium salt with the superacid. Furthermore, a trace amount of water bound to the superacid reacts with PF6− to induce a mechanically stable solid-electrolyte-interphase (SEI) layer rich in LixPOyFz. This study demonstrates the beneficial effect of the superacid on emerging post-lithium-ion batteries by immobilizing the anion of the salt as well as modifying the SEI composition.

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