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- Yanyao Hu
- School of Physics and Electronics, Hunan University , Changsha 410083, China
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- Ling Fan
- School of Physics and Electronics, Hunan University , Changsha 410083, China
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- Apparao M Rao
- Department of Physics and Astronomy, Clemson Nanomaterials Institute, Clemson University , Clemson, SC 29634, USA
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- Weijian Yu
- School of Physics and Electronics, Hunan University , Changsha 410083, China
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- Caixiang Zhuoma
- School of Physics and Electronics, Hunan University , Changsha 410083, China
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- Yanhong Feng
- School of Physics and Electronics, Hunan University , Changsha 410083, China
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- Zhihui Qin
- School of Physics and Electronics, Hunan University , Changsha 410083, China
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- Jiang Zhou
- School of Materials Science and Engineering, Central South University , Changsha 410083, China
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- Bingan Lu
- School of Physics and Electronics, Hunan University , Changsha 410083, China
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説明
<jats:title>Abstract</jats:title><jats:p>Electrolyte anions are critical for achieving high-voltage stable potassium-metal batteries (PMBs). However, the common anions cannot simultaneously prevent the formation of ‘dead K’ and the corrosion of Al current collector, resulting in poor cycling stability. Here, we demonstrate cyclic anion of hexafluoropropane-1,3-disulfonimide-based electrolytes that can mitigate the ‘dead K’ and remarkably enhance the high-voltage stability of PMBs. Particularly, even using low salt concentration (0.8 M) and additive-free carbonate-based electrolytes, the PMBs with a high-voltage polyanion cathode (4.4 V) also exhibit excellent cycling stability of 200 cycles with a good capacity retention of 83%. This noticeable electrochemical performance is due to the highly efficient passivation ability of the cyclic anions on both anode and cathode surfaces. This cyclic-anion-based electrolyte design strategy is also suitable for lithium and sodium-metal battery technologies.</jats:p>
収録刊行物
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- National Science Review
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National Science Review 9 (10), nwac134-, 2022-07-09
Oxford University Press (OUP)
