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Creators/Authors contains: "Ingram, Brian J"

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  1. ; ; ; ; ; ; ; ; ; ; et al (, Batteries & Supercaps)
    Abstract Realizing extreme fast charging (XFC) in lithium‐ion batteries for electric vehicles is still challenging due to the insufficient lithium‐ion transport kinetics, especially in the electrolyte. Herein, a novel high‐performance electrolyte (HPE) consisting of lithium bis(fluorosulfonyl)imide (LiFSI), lithium hexafluorophosphate (LiPF6) and carbonates is proposed and tested in pilot‐scale, 2‐Ah pouch cells. Moreover, the origin of improved electrochemical performance is comprehensively studied via various characterizations, suggesting that the proposed HPE exhibits high ionic conductivity and excellent electrochemical stability at high charging rate of 6‐C. Therefore, the HPE‐based pouch cells deliver improved discharge specific capacity and excellent long‐term cyclability up to 1500 cycles under XFC conditions, which is superior to the conventional state‐of‐the‐art baseline electrolyte. 
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  2. ; ; ; ; ; ; ; ; ; ; et al (, Nanoscale)
    null (Ed.)
    V 2 O 5 is of interest as a Mg intercalation electrode material for Mg batteries, both in its thermodynamically stable layered polymorph (α-V 2 O 5 ) and in its metastable tunnel structure (ζ-V 2 O 5 ). However, such oxide cathodes typically display poor Mg insertion/removal kinetics, with large voltage hysteresis. Herein, we report the synthesis and evaluation of nanosized ( ca . 100 nm) ζ-V 2 O 5 in Mg-ion cells, which displays significantly enhanced electrochemical kinetics compared to microsized ζ-V 2 O 5 . This effect results in a significant boost in stable discharge capacity (130 mA h g −1 ) compared to bulk ζ-V 2 O 5 (70 mA h g −1 ), with reduced voltage hysteresis (1.0 V compared to 1.4 V). This study reveals significant advancements in the use of ζ-V 2 O 5 for Mg-based energy storage and yields a better understanding of the kinetic limiting factors for reversible magnesiation reactions into such phases. 
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  3. ; ; ; ; ; ; ; ; ; ; et al (, ACS Energy Letters)
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