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LiMn2O4 (LMO) spinel cathode materials attract much interest due to the low price of manganese and high power density for lithium‐ion batteries. However, the LMO cathodes suffer from the Mn dissolution problem at particle surfaces, which accelerates capacity fade. Herein, the authors report that the oxidative synthesis condition is a key factor in the cell performance of single‐crystalline LiMn2‐x...
Employing high voltage cobalt‐free spinel LiNi0.5Mn1.5O4 (LNMO) as a cathode is promising for high energy density and cost‐effectiveness, but it has challenges in all‐solid‐state batteries (ASSBs). Here, it is revealed that the limitation of lithium argyrodite sulfide solid electrolyte (Li6PS5Cl) with the LNMO cathode is due to the intrinsic chemical incompatibility and poor oxidative stability. Through...
High‐nickel layered oxide cathodes and lithium‐metal anode are promising candidates for next‐generation battery systems due to their high energy density. Nevertheless, the instability of the electrode–electrolyte interphase is hindering their practical application. Localized high‐concentration electrolytes (LHCEs) present a promising solution for achieving uniform lithium deposition and a stable cathode–electrolyte...
Sodium layered oxides show great promise as affordable alternatives to lithium layered oxides, but their poor cycle life and air stability limit their practical potential. Micron‐scale single crystals with greater packing density and lower surface area can overcome these challenges and improve performance compared to the traditional polycrystalline morphology. Herein, the authors present the synthesis...
Among the bifunctional catalysts for water splitting, recently emerged transition‐metal single‐atom catalysts are theoretically considered to possess high potential, while the experimental activity is not satisfactory yet. Herein, an exceptionally efficient trifunctional metal–nitrogen–carbon (M–N–C) catalyst electrode, composed of a hierarchical carbon matrix embedding isolated nickel atoms with...
Lithium‐sulfur (Li‐S) batteries are highly considered as a next‐generation energy storage device due to their high theoretical energy density. For practical viability, reasonable active‐material loading of >4.0 mg cm−2 must be employed, at a cost to the intrinsic instability of sulfur cathodes. The incursion of lithium polysulfides (LiPS) at higher sulfur loadings results in low active material...
Metal phosphides and heteroatom‐doped carbons have been regarded as promising candidates as bifunctional catalysts for oxygen evolution reaction (OER) and oxygen reduction reaction (ORR). However, both have suffered from stability issues during repeated ORR and OER operations in zinc–air batteries (ZABs). Herein, this study reports a versatile cobalt‐based hybrid catalyst with a 1D structure by integrating...
Rechargeable batteries based on an abundant metal such as aluminum with a three‐electron transfer per atom are promising for large‐scale electrochemical energy storage. Aluminum can be handled in air, thus offering superior safety, easy fabrication, and low cost. However, the development of Al‐ion batteries has been challenging due to the difficulties in identifying suitable cathode materials. This...
Activated highly porous carbon nanotubes are synthesized with a facile dual‐nozzle co‐electrospinning and a redox process to apply the framework of a sulfur‐immobilized composite as a high‐performance cathode in lithium–sulfur batteries.
A facile, self‐templated strategy for the synthesis of Co‐ and N‐doped carbon microtubular structures composed of nanoscale hollow spheres and nanotubes is proposed. Cobalt oxalate microtubes serve simultaneously as the solid cobalt precursor for the in situ conversion reaction to metal‐organic framework and self‐templates for the 1D tubular structure.
Improved thin‐film microbatteries are needed to provide appropriate energy‐storage options to power the multitude of devices that will bring the proposed “Internet of Things” network to fruition (e.g., active radio‐frequency identification tags and microcontrollers for wearable and implantable devices). Although impressive efforts have been made to improve the energy density of 3D microbatteries,...
Sulfur cathodes have become appealing for rechargeable batteries because of their high theoretical capacity (1675 mA h g−1). However, the conventional cathode configuration borrowed from lithium‐ion batteries may not allow the pure sulfur cathode to put its unique materials chemistry to good use. The solid(sulfur)–liquid(polysulfides)–solid(sulfides) phase transitions generate polysulfide intermediates...
A custom single‐wall carbon nanotube (SWCNT)‐modulated separator is employed to directly suppress the polysulfide migration and indirectly protect the lithium‐metal anode from severe polysulfide contamination. The conductive sp2‐carbon scaffold continuously reactivates and reutilizes the trapped active material, so the SWCNT‐modulated separator provides a facile way to facilitate the implementation...
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