【摘 要】
：
Metal sulfides have been widely investigated as promising electrode materials for potassium-ion batteries(PIBs)due to their high theoretical capacities.However,the practical application of metal sulfides in PIBs is still hindered by their intrinsic shortc
【机 构】
：
Jiangsu Key Laboratory of New Power Batteries,Jiangsu Collaborative Innovation Center of Biomedical
论文部分内容阅读
Metal sulfides have been widely investigated as promising electrode materials for potassium-ion batteries(PIBs)due to their high theoretical capacities.However,the practical application of metal sulfides in PIBs is still hindered by their intrinsic shortcomings of low conductivity and severe volume changes during the potassiation/depotassiation process.Herein,a simple template-based two-step annealing strategy is proposed to impregnate CoS2 nanoparticles in the well-structured carbon nano-cubes(denoted CoS2/CNCs)as an advanced anode material for PIBs.The ex-situ XRD measurements reveal the K+storage mechanism in CoS2/CNCs.Benefiting from the unique structures,including abundant active interfacial sites,high electronic conductivity,and significantly alleviated volume variation,CoS2/CNCs present a high specific capacity(537.3 mAh g-1 at 0.1 A g-1),good cycling stability(322.4 mAh g-1 at 0.5 A g-1 after 300 cycles),and excellent rate capability(153.1 mAh g-1 at 5 Ag-1).Moreover,the obtained nanocomposite shows superior potassium storage properties in K-ion full cells when it is coupled with a KVPO4F cathode.
其他文献
The widespread use of bisphenol A(BPA)poses a serious threat to the environment and human health.However,efficient removal of BPA in water is incredibly challenging,owing to the inert chemical nature and electrical neutrality of BPA.In order to solve this
Electrochemical hydrogenation (ECH) of biomass-derived platform molecules is a burgeoning route for the sustainable utili-zation of hydrogen.However,the noble-metal-catalyzed ECH of phenolic compounds suffers from intense competition with hydrogen evoluti
A mixed-valent high spin(μ-hydroxo)dicobalt(Ⅱ/Ⅲ)complex bearing N,N\'-bis(5-tertbutylsalicylidene)-1,2-diaminobenzene(SalophentBu)ligand was synthesized by reacting(SalophentBu)Co(Ⅱ)(Py)with O2 at low temperature.This complex was isolated and structural
The creation of artificial enzymes to mimic natural enzymes remains a great challenge owing to the complexity of the structural arrangement of the essential amino acids in catalytic centers.In this study,we used the phosphatase-based enzyme-instructed sel
The crucial component,bulky spacers,in two-dimensional Ruddlesden-Popper (2DRP) layered tin (Sn) perovskites are highly limited by halide ammonium salts,leading to the insufficient control of complex crystallization process due to the limited interaction
Molecular rectifier,as a basic function of molecular electronic devices,has attracted extensive attention for the opportunity in constructing sub-nanometer electronic devices.However,tunneling leakage current has a significant contribution as electronic d
Copolymer hydrogels formed from cationic and aromatic monomers with identical monomer compositions but different average sequences were synthesized by free-radical copolymerization in various solvents.We found that hydrogels with one-component-rich segmen
Continuous-flow microreactors offer increased reactivity and reusability via unique reaction pathways to address a wide range of practical nanocatalysis problems.However,only limited platforms exist to employ these microreactors for versatile nanocata-lyt
The asymmetric assembly and spontaneous resolution of chiral heterometal-organic frameworks from achiral precursors remain a great challenge.Herein,we report the formation and spontaneous resolution of three-dimensional(3D)chiral 3d-4f hetero-metal-organi
A bulk heterojunction in organic solar cells is where charge separation and recombination occur.Molecular orientation at the interface is one of the key factors that dictate solar cell efficiency.Although X-ray scattering-based methods can determine donor