Potassium iron sulfate fluoride (KFeSO 4 F) is a high-voltage positive electrode material for potassium-ion batteries, but its practical performance remains limited due to its moderate electronic conductivity. In this study, we employed Mg ion doping in the Fe site of KFeSO 4 F to tune the crystallinity and ionic/electronic conductivity.

2022年2月1日 · Using density functional dynamical mean-field theory, we show how correlation effects lead to pseudogap and Kondo-quasiparticle features in the electronic structure of pure and doped KFe 2 Se 2 superconductor.

OUTPUT Name LF MF HF GAIN (dB) 2.0 -4.0 -1.0 DELAY (ms) 0.00 0.00 0.71 POLARITY Positive Positive Positive HPF Freq (Hz) 40 281 1410 Slope (dB) 24 24 24 Shape Butterworth Linkwitz-Riley Butterworth LPF Freq (Hz) 306 1410 16000 Slope (dB) 24 18 24 Shape Linkwitz-Riley Butterworth Butterworth PEQ1 Freq 79 315 1680(Hz) Level (dB) 12.0 4.0 -1.0 Type Parametric Parametric Parametric

2022年11月15日 · 硫酸氟化铁钾（KFeSO 4 F）是一种用于钾离子电池的高压正极材料，但由于其电子电导率适中，其实用性能仍然受到限制。 在这项研究中，我们在 KFeSO 4 F 的 Fe 位置使用 Mg 离子掺杂来调节结晶度和离子/电子电导率。 此外，我们与碳纳米管制成复合材料以增强电极的电子导电性。 在充满浓缩钾双（氟磺酰基）酰胺/三甘醇二甲醚电解质的钾离子电池中，KFe 0.95 Mg 0.05 SO 4 F/CNT 复合电极提供 107 和 100 mAh g –1的放电（钾化）容量在第一个和第 …

2019年10月23日 · KFeO 2 is presented as a new type of cathode material for potassium-ion batteries. In contrast to LiFeO 2 and NaFeO 2, KFeO 2 has tetrahedrally coordinated Fe 3+ ions linked by three-dimensional corner-sharing. When chemically oxidized, KFeO 2 releases ca. 0.3 K + (K 0.7 FeO 2) and shows no apparent changes in X-ray diffraction patterns.

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In this work, we successfully synthesize ultra-long KFeS 2 nanowires on an Fe foam substrate via a simple hydrothermal strategy. Physical characterization shows that the as-synthesized KFeS 2 nanowires possess merits of good morphological uniformity, considerable mass loading (∼76 mg cm −2) and strong affinity for the substrate.

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