Matches in SemOpenAlex for { <https://semopenalex.org/work/W4384498440> ?p ?o ?g. }
- W4384498440 abstract "Potassium vanadium fluorophosphate (KVPO 4 F) is regarded as a promising cathode candidate for potassium-ion batteries due to its high working voltage and satisfactory theoretical capacity. However, the usage of electrochemically inactive binders and redundant current collectors typically results in inferior electrochemical performance and low energy density, thus implying the important role of rational electrode structure design. Herein, we have reported a scalable and cost-effective synthesis of a cellulose-derived KVPO 4 F self-supporting electrode, which features a special surface hydroxyl chemistry, three-dimensional porous and conductive framework, as well as super flexible and stable architecture. The cellulose not only serves as a flexible substrate, a pore-forming agent, and a versatile binder for KVPO 4 F/conductive carbon but also enhances the K-ion migration ability. Benefiting from the special hydroxyl chemistry-induced storage mechanism and electrode structural stability, the flexible freestanding KVPO 4 F cathode exhibits high-rate performance (53.0% capacity retention with current densities increased 50-fold, from 0.2 C to 10 C) and impressive cycling stability (capacity retention up to 74.9% can be achieved over 1,000 cycles at a rate of 5 C). Such electrode design and surface engineering strategies, along with a deeper understanding of potassium storage mechanisms, provide invaluable guidance for better electrode design to boost the performance of potassium-ion energy storage systems." @default.
- W4384498440 created "2023-07-18" @default.
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- W4384498440 date "2023-07-17" @default.
- W4384498440 modified "2023-10-03" @default.
- W4384498440 title "Regulating cathode surface hydroxyl chemistry enables superior potassium storage" @default.
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- W4384498440 doi "https://doi.org/10.1073/pnas.2301622120" @default.
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