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... The general expression is derived for the diffusiophoretic velocity of a spherical colloidal particle of radius a in a concentration gradient of symmetrical electrolyte. On the basis of this expression, simple approximate analytic expressions for the diffusiophoretic velocity correct up to the order of 1/κa is derived, where κ is the Debye‐Hückel parameter. It is found that the approximate express ...
... Flexible memristors hold great promise for flexible electronics applications but are still lacking of good electrical performance together with mechanical flexibility. Herein, we demonstrate a full-inorganic nanoscale flexible memristor by using free-standing ductile α-Ag₂S films as both a flexible substrate and a functional electrolyte. The device accesses dense multiple-level nonvolatile states ...
... Modification of the π-conjugated backbone structure of conjugated polyelectrolytes (CPEs) for use as electron injection layers (EILs) in polymer light emitting diodes (PLEDs) has previously brought conflicted results in the literature in terms of device efficiency and turn-on response time. Herein, we determine the energetics at the CPE and the light emitting polymer (LEP) interface as a key facto ...
... Recent developments in the study of the formation of self-assembled surfactant structures and multilayers at the solid-solution interface are presented. It covers a wide range of phenomena, but in this review the main focus is on the surface structures formed from dilute solution in the presence of electrolyte and in more concentrated solutions. Their formation under those conditions are set in th ...
... A critical bottleneck for developing successful solid-state batteries is minimizing the interfacial impedances between the solid electrolyte and the active electrode materials. Advancing our understanding of the chemically and electro-chemically induced reactions of the cathode–electrolyte interface is important to achieve stable interfaces with desired charge transfer properties. The perovskite L ...
... In this work, two isomers are mixed in different proportions and then alkalized as the organic anode material for sodium-ion batteries (SIBs). The mixed material, denoted as PN, shows distinct morphology and electrochemical properties, compared to the single-component Na-CPP and Na-CPN. The Initial Coulombic Efficiency (ICE) value obtained by using the mixed PN as anode is higher than that using t ...
... The rational electrolyte design with weak solvation is regarded as an effective way to regulate the electrolyte/electrode interface (SEI) that profoundly affects the performance of Li-metal batteries. Herein, we propose a newly developed siloxane-based weakly solvating electrolyte (SiBE) with contact ion pairs (CIPs) or aggregates (AGGs) dominating the solution structure, which enables the dendrit ...
... Developing solid electrolytes with a wide electrochemical window and high ionic conductivity is key to the development of all-solid-state batteries with high energy and power density. A novel conjuncto-hydroborate of Na₂B₂₀H₁₈ is reported here as a promising solid electrolyte with electrochemical stability up to 5.1 V vs. Na⁺/Na and a Na-ion conductivity of 2.5 × 10⁻⁶ S cm⁻¹ at 25 °C. Furthermore, ...
... The layer-by-layer technique (LbL) using polysaccharides is receiving increasing interest as the preparation of nano- and micro- multilayer objects composed by natural materials is a promising alternative for actual systems. The use of bacterial polysaccharides and more particularly, dextrans and dextran derivatives, in LbL assemblies allows the simple formation of biodegradable and biocompatible ...
... Garnet-type solid-state electrolyte Li₇La₃Zr₂O₁₂ (LLZO) is expected to realize the next generation of high-energy-density lithium-ion batteries. However, the severe dendrite penetration at the pores and grain boundaries inside the solid electrolyte hinders the practical application of LLZO. Here, it is reported that the desirable quality and dense garnet Li₆.₈Al₀.₂La₃Zr₂O₁₁.₈₀F₀.₂₀ can be obtained ...
... The stability of a colloidal dispersion has long been expressed in terms of the stability ratio. Based on the available theories of coagulation of colloidal dispersions, a novel expression, complying with the classical definition, is developed for the stability ratio. It accounts for the contributions of both primary and secondary minimum coagulations to the overall rate of coagulations. In additi ...
electrolytes, etc ; batteries; cathodes; electrochemistry; Show all 4 Subjects
Abstract:
... A novel “water in salt” electrolyte is reported for the design of a rocking-chair proton battery. In 20 M ZnCl₂ + 1 M HCl electrolyte, the electrochemical proton storage performance using MoO₃ is significantly improved. When coupled with a Ni-PBA cathode, the device exhibits a good cycling stability of 76.1% after 400 cycles. This work opens a new avenue for designing low-cost “water in salt” elec ...
... Surface coating of lithium layered oxide cathode (e.g., LiNi₀.₅Co₀.₃Mn₀.₂O₂, NCM532) has become an important modified method in lithium-ion batteries for pursuing higher capacity and rate performance and safety. However, the design and synthesis of polymetallic oxide (PMO) coatings on lithium layered oxide is still a challenge. Herein, polymetallic alloys (PMA) such as NiCoMn alloys (NCM), LaZrHfM ...
... The Mn²⁺ dissolution of MnO₂ cathode materials causes rapid capacity decay in aqueous zinc batteries. We herein show that the dissolved Mn²⁺ can be deposited back to the cathode with the aid of a suitable conductive agent. The active material is thus retained for energy storage, and this MnO₂/Mn²⁺ redox process also provides capacity. In the Mn²⁺ free ZnSO₄ electrolyte, MnO₂ delivers 325 mA h g⁻¹ ...
electrolytes, etc ; carbon; carbonates; phosphates; solvents; Show all 5 Subjects
Abstract:
... We introduce a fire-retarding phosphate-based electrolyte, 1 M NaBF₄ in triethyl phosphate with 3% vinylene carbonate as an SEI-forming additive, for sodium-ion batteries. With this electrolyte formulation, we achieved stable cycling performance with a capacity of 80.5 mA h g⁻¹ and a retention of 77.8% after 200 cycles in the Na-ion full cell of Na₃.₂V₁.₈Zn₀.₂(PO₄)₃vs. hard carbon. ...
electrolytes, etc ; electrochemical capacitors; energy density; Show all 3 Subjects
Abstract:
... A pristine, redox-active triphenylstibine based COF (Sb-COF) exhibits well-uniform nanostructures which could provide sufficient electron conduction pathways and minimize the ion transport lengths, making triphenylstibine moieties readily accessible by the electrolyte. The assembled Sb-COF//rGO thus provides an excellent energy density of 69 W h Kg⁻¹. ...
electrolytes, etc ; cathodes; hydrogen; nanowires; semiconductors; Show all 5 Subjects
Abstract:
... The performance of photoelectrochemical water splitting (PEC-WS) over time was drastically improved using new carrier-guiding semiconductor nanostructures, namely InGaN/GaN core–shell nanowires (CSNWs) with a protruding core, as a photocathode (PC) material. The InGaN/GaN CSNWs designed in this study enable photo-generated electrons to accumulate at the interface between the InGaN core and the GaN ...
electrolytes, etc ; anodes; cathodes; electrochemistry; lithium; Show all 5 Subjects
Abstract:
... The insufficient activation of a S/C cathode makes insufficient utilization of S in Li–S pouch cells, while the deep activation of a S/C cathode in a formation process is time-consuming and produces lithium polysulfides, which corrode a Li anode. Both situations lead to a low actual capacity of the Li–S pouch cells with a high S loading but are ignored for coin cells. In this work, electrochemical ...
electrolytes, etc ; cathodes; cellulose; electrochemistry; sulfur; Show all 5 Subjects
Abstract:
... This study demonstrates flexible, ultra-high rate, and long cycle life lithium‑sulfur batteries using bacterial cellulose (BC) derived cathode host as well as separator. The work also includes a new strategy to use active sulfur in the form of catholyte added directly to the electrolyte for improved sulfur utilization. The fabricated LiS cell with carbonized bacterial cellulose (CBC) as a cathode ...
... Fuel cells are an efficient, environmentally friendly and renewable energy device, which is synonymous with the green age. Microfluidic fuel cells are an excellent solution to the energy needs of portable electronic devices. In the present study, both vapor- and liquid-feed modes are established, which are combined with physical fields. Moreover, the accuracy of the models is verified. According t ...