What question did this study set out to answer?

To design a low-temperature, high-voltage siloxane-based electrolyte that accelerates interfacial kinetics and overcomes the safety and cost limitations of fluorinated solvents.

November 20, 2024Advanced Materials

Optimizing Si─O Conjugation to Enhance Interfacial Kinetics for Low‐Temperature Rechargeable Lithium‐Ion Batteries

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Authors

YWYiwen Wang JLJie Liu HJHaoqing Ji

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Overview

Experimental study reveals enhanced interfacial kinetics in high-voltage lithium-ion batteries using siloxanes, indicating a viable pathway for extreme low-temperature energy storage.

Key Points

To design a low-temperature, high-voltage siloxane-based electrolyte that accelerates interfacial kinetics and overcomes the safety and cost limitations of fluorinated solvents.
Engineered siloxane solvents using Si─O d-p orbital conjugation to weaken lithium-ion-solvent interactions and modify anion cluster solvation structures.
Evaluated the siloxane electrolyte system in 2.3 Ah graphite||NCM811 pouch cells operated at high voltage (4.45 V) under temperatures down to -50 °C.
Pouch cells containing the siloxane-based electrolyte maintained 75.1% of their room-temperature capacity at -50 °C.
The electrolyte achieved 67.6% reversible charging capacity retention at -40 °C alongside stable cycling performance at -20 °C.

Cite This Study

Wang et al. (2024) studied this question.

synapsesocial.com/papers/69d6c347f174babf6cab36fd https://doi.org/10.1002/adma.202412155

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November 20, 2024Advanced Materials

Optimizing Si─O Conjugation to Enhance Interfacial Kinetics for Low‐Temperature Rechargeable Lithium‐Ion Batteries

View Full Paper

Ask AI

Bookmark

Authors

YWYiwen Wang JLJie Liu HJHaoqing Ji

Discussion

Member takes

Overview

Experimental study reveals enhanced interfacial kinetics in high-voltage lithium-ion batteries using siloxanes, indicating a viable pathway for extreme low-temperature energy storage.

Key Points

To design a low-temperature, high-voltage siloxane-based electrolyte that accelerates interfacial kinetics and overcomes the safety and cost limitations of fluorinated solvents.
Engineered siloxane solvents using Si─O d-p orbital conjugation to weaken lithium-ion-solvent interactions and modify anion cluster solvation structures.
Evaluated the siloxane electrolyte system in 2.3 Ah graphite||NCM811 pouch cells operated at high voltage (4.45 V) under temperatures down to -50 °C.
Pouch cells containing the siloxane-based electrolyte maintained 75.1% of their room-temperature capacity at -50 °C.
The electrolyte achieved 67.6% reversible charging capacity retention at -40 °C alongside stable cycling performance at -20 °C.

Cite This Study

Wang et al. (2024) studied this question.

synapsesocial.com/papers/69d6c347f174babf6cab36fd https://doi.org/10.1002/adma.202412155

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