Extraordinarily stable and wide‐temperature range sodium/potassium‐ion batteries based on <scp>1D SnSe<sub>2</sub>‐SePAN</scp> composite nanofibers
نویسندگان
چکیده
Developing electrodes with long lifespan and wide-temperature adaptability is crucial important to achieve high-performance sodium/potassium-ion batteries (SIBs/PIBs). Herein, the SnSe2-SePAN composite was fabricated for extraordinarily stable range SIBs/PIBs through a coupling strategy between controllable electrospinning selenylation, in which SnSe2 nanoparticles were uniformly encapsulated SePAN matrix. The unique structure of not only relieves drastic volume variation but also guarantees structural integrity composite, endowing excellent sodium/potassium storage properties. Consequently, displays high sodium capacity feasibility wide working temperature (−15 60°C: 300 mAh g−1/700 cycles/−15°C; 352 g−1/100 cycles/60°C at 0.5 A g−1). At room temperature, it delivers record-ultralong cycling life 192 g−1 that exceeds 66 000 cycles even 15 g−1. It exhibits extremely superb electrochemical performance PIBs (157 exceeding 5 ex situ XRD TEM results attest conversion-alloy mechanism SnSe2-SePAN. Also, computational calculations verify takes an role intensifying electrode. Therefore, this study breaks new ground on solving polyselenide dissolution issue improving workable storage.
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ژورنال
عنوان ژورنال: InfoMat
سال: 2023
ISSN: ['2770-5110', '2567-3165']
DOI: https://doi.org/10.1002/inf2.12467