Carbon fluorides for rechargeable batteries

Li, Wen; Ma, Sen; Wan, Bingxin; Li, Yong; Guo, Rui; Wu, Chao; Ma, Shangde; Pei, Haijuan; Xie, Jun

doi:10.1016/j.apmt.2023.101883

Applied Materials Today

2023

DOI: 10.1016/j.apmt.2023.101883

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Carbon fluorides for rechargeable batteries

Wen Li¹,

Sen Ma²,

Bingxin Wan³

et al.

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2024

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Cited by 3 publications

References 62 publications

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Enable Rechargeable Carbon Fluoride Batteries with Unprecedented High Rate and Long Life by Oxygen Doping and Electrolyte Formulation

Li,

Yu,

2024

Advanced Materials

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Here, a rechargeable carbon fluoride battery is demonstrated with unprecedented high rate and long life by oxygen doping and electrolyte formulation. The introductions of Mn2+–O catalyst and porous structure during the oxidation process of CFx cathode can promote the splitting of Li–F during charging. By further modulating the electrolyte with triphenylantimony chloride (TSbCl) as anion acceptor and CsF as product modulator, the more readily dissociable CsLiF2 product instead of LiF is preferentially formed, and the TSbCl‐salt protection interface is constructed to confine Li–F based products and reduce fluoride loss at cathode side. These effects endow Li‐CFx batteries with durable reversible conversion reaction (for at least 600 cycles), ultrahigh rate performance (e.g., 364 mAh g−1 at 20 A g−1) and low charging plateau voltage down to 3.2 V. The cathode exhibits the maximum power density of 38342 W kg−1 and energy density of 1012 Wh kg−1. Furthermore, this Li‐CFx system demonstrates the promising prospects for applications in view of its low temperature operation (e.g., 280 mAh g−1 at −20 °C), low self‐discharge ability, large‐scale pouch cell fabrication and high cathode loading (5–6 mg cm−2), enabling it to move beyond previous role as primary battery and into new role as fast‐charging rechargeable battery with high energy density.

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Enable Rechargeable Carbon Fluoride Batteries with Unprecedented High Rate and Long Life by Oxygen Doping and Electrolyte Formulation

Li,

Yu,

2024

Advanced Materials

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A Facile Approach to Boost the Specific Capacity of Fluorinated Carbon Cathode for Rechargeable Na/CFx Battery

Hu,

Li,

Song

et al. 2024

J. Electron. Mater.

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Embedded sensors for in situ measuring and safety warning in lithium carbon fluorides batteries

Wan,

Liu,

et al. 2024

Applied Physics Letters

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Lithium/carbon fluoride (Li/CFx) batteries are highly favored for ultra-high specific energy systems due to their attractive features. However, the significant heat generation poses serious risks including thermal runaway, illustrating the critical need of real-time monitoring during battery operation. Currently, fewer studies have focused on the development of sensors for Li/CFx batteries, especially on the compatibility with embedded sensors. Here, two types of embedded sensors are employed to achieve detection and safety warning. The internal temperature of the Li/CFx battery rises by 8.42 °C at a current rate of 0.1C. Additionally, the embedded atmospheric pressure sensors provide a safety warning with a safety threshold of 0.43 kPa/cm2 before the first destructive venting. Consequently, this nondestructive detection and warning can significantly enhance the safety measures for Li/CFx batteries.

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Carbon fluorides for rechargeable batteries

Cited by 3 publications

References 62 publications

Enable Rechargeable Carbon Fluoride Batteries with Unprecedented High Rate and Long Life by Oxygen Doping and Electrolyte Formulation

Enable Rechargeable Carbon Fluoride Batteries with Unprecedented High Rate and Long Life by Oxygen Doping and Electrolyte Formulation

A Facile Approach to Boost the Specific Capacity of Fluorinated Carbon Cathode for Rechargeable Na/CFx Battery

Embedded sensors for in situ measuring and safety warning in lithium carbon fluorides batteries

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