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High-Energy and Lon...
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Lee, SuyeongChonnam National University
(author)
High-Energy and Long-Lifespan Potassium–Sulfur Batteries Enabled by Concentrated Electrolyte
- Article/chapterEnglish2022
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LIBRIS-ID:oai:research.chalmers.se:9fb12852-1b49-4fdf-b525-08bb6af2a9ac
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https://research.chalmers.se/publication/532105URI
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https://doi.org/10.1002/adfm.202209145DOI
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Language:English
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Summary in:English
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Potassium–sulfur (K–S) batteries are emerging as low-cost and high-capacity energy-storage technology. However, conventional K–S batteries suffer from two critical issues that have not yet been successfully resolved: the dissolution of potassium polysulfides (KPS) into the liquid electrolyte and the formation of K dendrites on the K metal anode, which lead to inadequate cycling efficiencies with a low reversible capacity. Herein, a high-capacity and long cycle-life K–S battery consisting of a highly concentrated electrolyte (HCE) (4.34 mol kg−1 potassium bis(fluorosulfonyl)imide in a 1,2-Dimethoxyethane) and a sulfurized polyacrylonitrile (SPAN) cathode is presented The application of a HCE efficiently suppresses the dendritic growth of K, as evidenced by operando optical imaging and phase field modeling, owing to the reduced K-ion depletion on the electrode surface and a uniform Faradaic current density over the K metal anode surface. Additionally, because S is covalently bonded to the C backbone of PAN in the SPAN structure, the SPAN cathode inhibits the dissolution of KPS. These features generate synergy that the proposed K–S battery can provide a practical areal capacity of 2.5 mAh cm−2 and unprecedented lifetimes with high Coulombic efficiencies over 700 cycles.
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Park, HyeonaChonnam National University
(author)
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Rizell, Josef,1996Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)rizell
(author)
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Kim, Un HyuckHanyang University
(author)
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Liu, YangyangMoscow Institute of Physics and Technology
(author)
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Xu, XieyuM. V. Lomonosov Moscow State University
(author)
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Xiong, Shizhao,1985Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)xiongs
(author)
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Matic, Aleksandar,1968Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)matic
(author)
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Zikri, Adi TiaraChonnam National University
(author)
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Kang, HyokyeongChonnam National University
(author)
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Sun, Yang KookHanyang University
(author)
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Kim, JaekookChonnam National University
(author)
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Hwang, Jang YeonChonnam National University
(author)
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Chonnam National UniversityChalmers tekniska högskola
(creator_code:org_t)
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In:Advanced Functional Materials: Wiley32:461616-30281616-301X
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Kim, Un Hyuck
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