Mixed ion‐electron conducting Li <sub>3</sub> P for efficient cathode prelithiation of all‐solid‐state Li‐ion batteries
نویسندگان
چکیده
All-solid-state batteries (ASSBs) using sulfide electrolytes hold promise for next-generation battery technology. Although a pure Li metal anode is believed to maximize energy density, numerous recent studies have implicated that Li-ion anodes (e.g., graphite and Si) are more realistic candidates due their interfacial compatibility with electrolytes. However, those ASSBs suffer from an issue similar liquid batteries, which loss of active inventory owing side reactions between electrode components, resulting in reduced available capacities shortened cycle life. Herein, the first time, we explore potential Li3P cathode prelithiation ASSBs. We identify crystallized (c-Li3P) has room-temperature ionic electronic conductivities both over 10−4 S/cm. Such mixed ion-electron conducting feature ensures neat c-Li3P affords high Li+-releasing capacity 983 mAh/g during charging. Moreover, electrochemical delithiation takes place below 2 V versus Li+/Li, while its lithiation dominates 1 Li+/Li. Once used as regent ASSBs, only functions Li+ donor without activity can adequately compensate minimal dosage added. Besides mitigating first-cycle loss, also improve cyclability by sustained release low-dosage ions subsequent cycles, been embodied several full coupling LiCoO2 various types (including graphite, foil, Sb, Si anode). Our work provides universal strategy high-efficiency
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ژورنال
عنوان ژورنال: SmartMat
سال: 2023
ISSN: ['2766-8525', '2688-819X']
DOI: https://doi.org/10.1002/smm2.1200