Inorganic Chemistry Frontiers
·
2024
·
IF 6.1
Guo-Guo Zhang,Pengtao Qiu,Jia-Xin Kang,Zhiwei Lu,An-Qi Zhu,Xiaohu Yu,Xuenian Chen
Solid-state potassium metal batteries have increasingly gained attention as promising alternatives in large-scale energy storage due to their safety and low cost. However, these batteries usually suffer from a lack of suitable K+ conducting solid electrolytes. Herein, a new KB11H14·2Me3NBH3 complex electrolyte with high ionic conductivity and relative stability against K metal is reported. The crystal structure was solved as a monoclinic P21/c lattice. Density functional theory (DFT) calculations confirm significantly enhanced K-ion diffusion in the structure. High K-ion conductivities of 2.63 × 10−6 S cm−1 at 25 °C and 3.25 × 10−4 S cm−1 at 75 °C are achieved, putting it among the leading K+ solid conductors. Moreover, it shows favorable interfacial stability against the K metal anode precoated with NH3B3H7. Batteries coupling the TiS2 cathode deliver long-term cycling stability. This work provides a new group of K-ion solid-state electrolytes for safe potassium metal batteries.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2018
·
IF 2.207
Yushan Luo,Bolei Shen,Bingshu Guo,Linyu Hu,Qiuju Xu,Renming Zhan,Youquan Zhang,Shujuan Bao,Maowen Xu
In this study, potassium titanium hexacyanoferrate (K 0.3 Ti 0.75 Fe 0.25 [Fe(CN) 6 ] 0.95 ·2.8H 2 O) was obtained by a simple co-precipitation and used as a cathode material in potassium-ion batteries (KIBs) for the first time. The reversible redox couples of Fe and Ti could provide 136.7 mA h g −1 at 50 mA g −1 and 113 mA h g −1 at 100 mA g −1 in the first discharge. Considering that this material is easy to synthesize, with low cost and good electrochemical performance , our results suggest the possible development of KIBs as cathodes and future research into rechargeable KIBs.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2014
·
IF 5.211
Guofu Ma,Jiajia Li,Kanjun Sun,Hui Peng,Jingjing Mu,Ziqiang Lei
A gel polymer PVA–KOH–K 3 [Fe(CN) 6 ] is prepared by potassium hydroxide and potassium ferricyanide doped polyvinyl alcohol, and a solid-state supercapacitor is assembled using the gel polymer as electrolyte and separator, activated carbons as electrode. The gel polymer exhibits flexible, high ionic conductivity and wide potential properties. The electrochemical properties of the supercapacitor are investigated using cyclic voltammetry , galvanostatic charge/discharge, and impedance spectroscopy techniques. The electrode specific capacitance of the supercapacitor can be as high as 430.95 F g −1 , and after 1000 cycles at a current density of 1 A g −1 it still remains higher than 380 F g −1 . The energy density and power density of the supercapacitor reach 57.94 Wh kg −1 and 59.84 kW kg −1 , respectively. These novel flexible gel polymers are desirable for applications in supercapacitor devices.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2022
·Vol. 13
·期 1
·1-13
·
IF 17.694
Li Siwu,Zhu Haolin,Liu Yuan,Han Zhilong,Peng Linfeng,Li Shuping,Yu Chuang,Cheng Shijie,Xie Jia
Potassium metal is an appealing alternative to lithium as an alkali metal anode for future electrochemical energy storage systems. However, the use of potassium metal is hindered by the growth of unfavourable deposition (e.g., dendrites) and volume changes upon cycling. To circumvent these issues, we propose the synthesis and application of nitrogen and zinc codoped porous carbon nanofibres that act as potassium metal hosts. This carbonaceous porous material enables rapid potassium infusion (e.g., < 1 s cm −2 ) with a high potassium content (e.g., 97 wt. %) and low potassium nucleation overpotential (e.g., 15 mV at 0.5 mA cm −2 ). Experimental and theoretical measurements and analyses demonstrate that the carbon nanofibres induce uniform potassium deposition within its porous network and facilitate a dendrite-free morphology during asymmetric and symmetric cell cycling. Interestingly, when the potassium-infused carbon material is tested as an active negative electrode material in combination with a sulfur-based positive electrode and a nonaqueous electrolyte solution in the coin cell configuration, an average discharge voltage of approximately 1.6 V and a discharge capacity of approximately 470 mA h g −1 after 600 cycles at 500 mA g −1 and 25 °C are achieved.
研究领域:
材料科学
·
电化学
·
能量存储
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Dongyang Li,Cai Liu,Dajian Huang,Miaoxin Zhang,Xin Zhang,Huiyang Gou,Fuxing Yin,Gongkai Wang
Potassium ion capacitors (PICs) represent a promising energy storage device with high energy and power densities for long stretches beyond the lithium and sodium storage chemistry of nowadays. As an analogous anode like lithium titanates, potassium titanates (KTO) are expected to be applied to PICs. Herein, hydrated KTO (K 2 Ti 6 O 13 ) nanobelts were regulated on graphene nanosheets by a method of atomic layer deposition (ALD) coupled with hydrothermal potassiation. The close correlation of KTO to the underneath graphene nanosheets favors the electron transport, the interweaved structure facilitates the permeation of electrolyte ions, and the chemically (interlayer) adsorbed water endows KTO with larger interlayer spacing, synergistically giving rise to an accelerated solid solution potassiation mechanism. Based upon this, superior specific capacity and rate capability (87 mAh g −1 @1 A g −1 ), as well as stability of the ALD KTO can be delivered, outperforming many performances of reported KTO anodes. The PICs exhibit simultaneously high energy/power densities (Max. 119.3 Wh kg −1 @117.5 W kg −1 , 4.7 kW kg −1 @35.3 Wh kg −1 ) as well as good capacity retention after 4,000 cycles. Our work demonstrates the great performance of ALD KTO anode and the promising application of PICs, which propose a delicate methodology of high performance K + storage anode materials.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Min Yang,Die Su,Wen Zhang,Jiaxing Wen,Wen Liu,Qi Luo,Li Liu,Xianyou Wang
The excellent electrochemical performance of indium sulfide (In 2 S 3 ) in lithium ion batteries (LIBs) and sodium ion batteries (SIBs) prompted us to explore its energy storage mechanism in potassium ion batteries (PIBs). In this work, In 2 S 3 /C nanofibers are successfully synthesized by simple electrospinning and subsequent vulcanization . In K half cells, compared to commercial In 2 S 3 electrodes, In 2 S 3 /C nanofibers as anode materials for PIBs show outstanding electrochemical performance, which can deliver reversible capacities of 397.6 (25), 366.2 (50), 335.2 (100), 307.8 (200), 260.4 (500) and 212.2 mAh g −1 (1000 mA g −1 ), respectively. In K full cells, In 2 S 3 /C nanofibers can also show good potassium storage performance and can light up 15 light emitting diodes (LEDs). The superb electrochemical performance of In 2 S 3 /C nanofibers is due to the in-situ composite with self-nitrogen-doped carbon matrix and the nanoization of In 2 S 3 particles, which buffers the volume effect and improves the conductivity of the material during the potassium storage process. In addition, the mechanism of potassium storage of In 2 S 3 /C nanofibers was systematically studied by cyclic voltammetry (CV), ex-situ XRD, TEM and XPS methods. The mechanism of In 2 S 3 for K-ion storage can be described as the conversion reaction: In 2 S 3 + 6K + + 6e − ⇌ In + 3K 2 S.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
FLUID PHASE EQUILIBRIA
·
2015
·
IF 2.2
Shufeng Shen,Ya-nan Yang,Yong Wang,Shaofeng Ren,Jiangze Han,Aibing Chen
Amino acid salts have potential use as alternative absorbents to alkanolamines for post combustion CO 2 capture, because of their negligible volatility, resistance to oxidative degradation and fast absorption rates. In this work, the density and viscosity of CO 2 -free and CO 2 -loaded aqueous solutions of potassium lysinate (LysK) and potassium prolinate (ProK) were measured at temperatures from (298.15 to 348.15) K and for their concentrations from (0.2 to 3.0) mol L −1 . The data were correlated accurately ( R 2 ≥ 0.99) as a function of temperature, concentration and CO 2 loading by nonlinear regression analysis. The solubility of CO 2 in 2.5 mol L −1 amino acid salt solutions was also determined in vapor–liquid equilibrium vessels at temperatures (313 and 333) K and CO 2 partial pressures relevant to flue gas conditions. It was found that, the CO 2 absorption capacity of LysK is higher than that of industrially used monoethanolamine (MEA) and the CO 2 loadings vary as LysK > ProK > MEA at given CO 2 partial pressures. Moreover, LysK may offer higher cyclic loading than MEA for CO 2 capture.
研究领域:
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
GEOCHIMICA ET COSMOCHIMICA ACTA
·
2023
·
IF 5
Ziyan Han,Hejiu Hui,Haizhen Wei,Weiqiang Li
The Moon is depleted in volatile elements and compounds, and lunar samples exhibit a wide range of Cl isotopic compositions , which is believed to result from the volatilization of metal chlorides (e.g., NaCl, KCl, and FeCl 2 ). However, the Cl isotopic fractionation behavior during volatilization is not well constrained, particularly for metal chlorides. Furthermore, the effect of metal chloride evaporation on metal isotopes is poorly known. In the present study, we performed NaCl and KCl sublimation experiments to study Cl and K isotopic fractionations at temperatures ranging from 923 K to 1061 K and at pressures of 7×10 –5 bar to 1 bar in an N 2 atmosphere. The isotope fractionation factors of 37/35 Cl( α gas–solid ) from NaCl sublimation experiments are 0.9985±0.0002, 0.9958±0.0004, and 0.99807±0.00004 at 1, 10 –2 , and 7×10 –5 bar, respectively. Those of 41/39 K( α gas–solid ) and 37/35 Cl( α gas–solid ) from KCl sublimation experiments are 0.99884±0.00004 and 0.9988±0.0003 at 1 bar, 0.9977±0.0002 and 0.9972±0.0003 at 10 –2 bar, and 0.9989±0.0002 and 0.9989±0.0001 at 7×10 –5 bar, respectively. Chlorine and K isotopes fractionate more at 10 –2 bar than at 7×10 –5 bar and 1 bar. The saturation index in all the sublimation experiments was >95%, which resulted in near-equilibrium isotopic fractionation at the sublimation interface. Therefore, the isotopic fractionation was controlled by mass transfer processes in the gas and solid phases. The isotopic fractionation at 10 –2 bar was controlled by the chemical diffusion of sublimated gas in an N 2 atmosphere with almost no convection effect, (i.e., Pe number close to zero), whereas the isotopic fractionation at 1 bar was suppressed by atmospheric convection with a turbulence factor of 0.4±0.1 (i.e., Pe number >1). The extremely high sublimation rate and the very slow diffusion in the sublimating solid at 7×10 –5 bar suppressed isotopic fractionations. Based on our experimental results, calculations using Cl/K and Na/K in lunar materials reveal that degassing of KCl contributed very little (<0.2‰) to the K isotopic fractionation (>0.58‰) during lunar magma ocean degassing. The Cl isotopic fractionation factor from lunar samples is similar to our results at 10 –2 bar. This similarity of Cl isotope fractionation indicates that there may have been a transient atmosphere above the lunar magma ocean.
研究领域:
地球化学
·
行星科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2025
·Vol. 26
·期 3
·1384
·
IF 4.9
Sadia Noorin,Youwei Du,Yi Liu,Shuanghong Wang,Yan Wang,Hongchen Jia,Tom Hsiang,Rong Zhang,Guangyu Sun
Potassium (K) fertilization is crucial for plant resistance to pathogens, but the underlying mechanisms remain unclear. Here, we investigate the molecular mechanism by which the addition of K promotes resistance inNicotiana benthamianatoPhytophthora parasitica. We found thatN. benthamianawith high K content (HK, 52.3 g/kg) produced more ethylene in response toP. parasiticainfection, compared toN. benthamianawith low-K content (LK, 22.4 g/kg). An exogenous ethylene application effectively increased resistance in LKN. benthamianato the level under HK status, demonstrating the involvement of ethylene in the HK-associated resistance inN. benthamiana. Further, transcriptome analysis showed thatNbSAMS1, encoding ethylene biosynthesis, was induced to upregulateP. parasiticaabout five times higher in HK than in LKN. benthamiana. NbSAMS1overexpression enhanced resistance in LK plants, whereasNbSAMS1silencing reduced resistance in HK plants, confirming its importance in conferring resistance. Furthermore, we identified a calcium-binding protein, NbCBP1, which interacted with NbSAMS1, promoting its expression in HKN. benthamiana.SilencingNbCBP1compromised resistance in HKN. benthamiana, whereas its overexpression improved resistance in LKN. benthamiana. Notably, NbCBP1 protected NbSAMS1 from degradation by the 26S proteasome, thereby sustaining ethylene accumulation in HKN. benthamianain response toP. parasiticainfection. Thus, our research elucidated some mechanisms of the NbCBP1-NbSAMS1 module associated with disease resistance in HKN. benthamiana.
研究领域:
植物病理学
·
分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Separations
·
2023
·Vol. 10
·期 1
·42
·
IF 2.6
Junjie Xie,Kang Li,Zhuonan Shi,Changli Min,Shina Li,Zichen Yin,Ruixin Ma
Solvent extraction with 4-tert-butyl-2-(α-methylbenzyl) phenol (t-BAMBP) is an effective method for the separation and purification of rubidium and cesium. A solution containing a high K+concentration (exceeding 80 g/L), which was ultra-salty, with about 200 g/L alkali metal ions, was used to extract Rb+and Cs+. The effects of the process parameters on the separation of cesium and rubidium were systematically studied. The optimum conditions were as follows: NaOH concentration of 0.5 mol/L, t-BAMBP concentration of 1 mol/L (in sulfonated kerosene), organic/aqueous volume ratio (O/A ratio) of 3:1, and contact time of 1 min. The extraction rates of cesium and rubidium were 99.81 and 98.09%, respectively, and 19.31% of potassium was co-extracted in the organic phase after five-stage countercurrent extraction. About 99.32% of K+in the organic phase could be removed after five-stage countercurrent scrubbing with deionized water at an O/A ratio of 2:1 for 2 min. When 0.5 mol/L hydrochloric acid solution was used as detergent, almost all of the cesium and rubidium (>99%) could be recovered by two-stage countercurrent stripping at an O/A ratio of 3:1 for 2 min. A solid compound was found and collected from the organic phase during multi-stage solvent extraction. Its composition and structure were determined by XRD, infrared Fourier-transform, and ICP-MS.Keywords:t-BAMBP;rubidium;cesium;potassium;extraction complex
研究领域:
化学工程
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
Soft Matter
·
2023
·Vol. 19
·期 26
·4880-4890
·
IF 3.4
Yan-Lin Wang,Xi Wang,Hai-Rong Yu,Ting Liang,Xing-Bin Lv,Chang-Jing Cheng
Potassium ions (K+) play crucial roles in many biological processes. Abnormal K+ levels in the body are usually associated with physiological disorders or diseases, and thus, developing K+-sensitive sensors/devices is of great importance for disease diagnosis and health monitoring. Herein, we report a K+-sensitive photonic crystal hydrogel (PCH) sensor with bright structural colors for efficient monitoring of serum potassium. This PCH sensor consists of a poly(acrylamide-co-N-isopropylacrylamide-co-benzo-15-crown-5-acrylamide) (PANBC) smart hydrogel with embedded Fe3O4 colloidal photonic crystals (CPCs), which could strongly diffract visible light and endow the hydrogel with brilliant structural colors. The rich 15-crown-5 (15C5) units appended on the polymer backbone could selectively bind K+ ions to form stable 2 : 1 [15C5]2/K+ supramolecular complexes. These bis-bidentate complexes served as physical crosslinkers to crosslink the hydrogel and contracted its volume, and thus reduced the lattice spacing of Fe3O4 CPCs and blue-shifted the light diffraction, and finally reported on the K+ concentrations by a color change of the PCH. Our fabricated PCH sensor possessed high K+ selectivity and pH- and thermo-sensitive response performances to K+. Most interestingly, the K+-responding PANBC PCH sensor could be conveniently regenerated via simple alternate flushing with hot/cold water due to the excellent thermosensitivity of the introduced PNIPAM moieties into the hydrogel. Such a PCH sensor provides a simple, low-cost and efficient strategy for visualized monitoring of hyperkalemia/hypokalemia, which will significantly promote the development of biosensors.
研究领域:
生物传感器
·
材料科学
·
分析化学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Yan Gu,Ya Ru Pei,Ming Zhao,Guo Yong Wang,Chun Cheng Yang,Qing Jiang
Potassium-ion batteries (PIBs) have gained tremendous attention to compete with lithium-ion batteries (LIBs), especially for storing energy on a large scale, due to their dominance in the geographical distribution of K resources and similar energy storage mechanisms. Herein, using an electrospinning method, we synthesized a unique material of carbon nanonecklaces with a high content of N-doping (N-CNN). The N-CNN-700 anode (N-CNN annealed at 700 °C) shows outstanding durability in PIBs, delivering 173 mAh g–1 after 1000 cycles at 1 A g–1. The unique characteristics of ultrahigh pyrrolic/pyridinic-N doping and hollow necklace-like structures account for excellent performance, which can enable fast electrolyte diffusion, increase active sites for K+ insertion, and enhance K+ adsorption ability. This object demonstrates a clever strategy to design a structure for improved energy storage technologies.
研究领域:
材料科学
·
能量存储
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）