Unraveling the Design Principles of Battery‐Supercapacitor Hybrid Devices: From Fundamental Mechanisms to Microstructure Engineering and Challenging Perspectives

The basic concept, working principles, and key scientific issues relating to battery-supercapacitor hybrid devices are elaborately overviewed. Innovative approaches to the design and synthesis of advanced electrode materials, interface engineering, cell voltage expansion, and some new-type battery-supercapacitor hybrid devices are summarized. Perspectives...

23h

Exceptional Cycling Performance Enabled by Local Structural Rearrangements in Disordered Rocksalt Cathodes

The intrinsic changes associated with voltage and capacity evolution upon cycling of cation-disordered Mn-rich oxyfluoride rocksalt cathode are investigated. Detailed diagnostic studies reveal the formation of local off-stoichiometry spinel-like domains accompanying reversible Mn and O redox, resulting in better Li diffusion kinetics and improved material...

2d

A High‐Performance Bidirectional Direct Current TENG by Triboelectrification of Two Dielectrics and Local Corona Discharge

Here, a bidirectional and double-channel triboelectric nanogenerator (BDC-TENG) based on triboelectrification of the dielectric-dielectric and local corona discharge is proposed. The BDC-TENG shows unique characteristics, in that the current direction is tunable by adjusting the slider movement direction and electronegativity difference of the two dielectric...

3d

Nanostructured Intermetallic Nickel Silicide (Pre)Catalyst for Anodic Oxygen Evolution Reaction and Selective Dehydrogenation of Primary Amines

A one-pot colloidal approach is adopted to synthesize homogeneous intermetallic nickel silicide nanostructures that behave as a highly active precatalyst for the oxygen evolution reaction and dehydrogenation of primary amines. A systematic investigation of the transformation of precatalysts, the nature of active sites and a structure-activity relation...

5d

Comment on “Multiphase, Multiscale Chemomechanics at Extreme Low Temperatures: Battery Electrodes for Operation in a Wide Temperature Range”

In 2021, Li et al. published a study to elucidate the multiscale and multiphase complexities in lithium-ion batteries after exposure to extreme low temperatures. This comment aims to 1) emphasize the significance of this study in the context of space exploration and 2) point out a possible explanation for the observed correlation between the low-temperature...

5d

Design Rationale and Device Configuration of Lithium‐Ion Capacitors

Lithium-ion capacitors (LICs) are powerful competitors to supercapacitors and batteries due to their high energy-power performance and long lifespan. The design rationale and device configuration of LICs are introduced, followed by the prelithiation methods and fabrication of multifunctional LICs. Finally, the status of commercial LICs and a possible...

5d

A Multifaceted Ferrocene Interlayer for Highly Stable and Efficient Lithium Doped Spiro‐OMeTAD‐based Perovskite Solar Cells

The doping of LiTFSI into highly efficient spiro-OMeTAD-based PSCs severely compromises the device stability via migration of Li+ into the perovskite. Here, ferrocene is used to bind to the lithium cations limiting their ability to migrate. This strategy significantly enhances the stability of resulting devices while also improving hole extraction across...

5d

Earth‐Abundant Metal‐Based Electrocatalysts Promoted Anodic Reaction in Hybrid Water Electrolysis for Efficient Hydrogen Production: Recent Progress and Perspectives

Hybrid water electrolysis (HWE) integrating biomass refining/pollutant degradation with the hydrogen evolution reaction is a feasible way to boost hydrogen production. This review summarizes recent development in promising anodic substrates and current progress in feasible electrocatalysts, providing an in-depth understanding of different reaction mechanisms...

5d

A Graphene‐Coated Thermal Conductive Separator to Eliminate the Dendrite‐Induced Local Hotspots for Stable Lithium Cycling

The formation of local temperature “hotspots” is demonstrated to be one of the triggers for dendritic lithium evolution by a thermal–electrochemical coupling simulation. To eliminate the “hotspots”, a graphene-layer-coated thermal conductive separator is constructed to achieve homogeneous lithium deposition and even “recover” cycled undesirable lithium...

5d

Carrier Generation Engineering toward 18% Efficiency Organic Solar Cells by Controlling Film Microstructure

A photovoltaic layer consisting of bicontinuous phase-separated networks of polymer donor and Y6 acceptor along with highly ordered nano-sized Y6 aggregates can effectively enhance charge generation via hole transfer by increasing the intra-moiety excited states from acceptor domains, which enables a high efficiency of 17.98% in D18:Y6-based organic...

6d