All-solid-state sodium batteries (ASSSBs) are promising candidates for grid-scale energy storage. However, there are no commercialized ASSSBs yet, in part due to the lack of a low-cost, simple-to-fabricate solid electrolyte (SE) with electrochemical stability towards Na metal. In this work, we report a family of oxysulfide glass SEs (Na
Microscopic understanding of interaction between H2O and MAPbI3 (CH3NH3PbI3) is essential to further improve efficiency and stability of perovskite solar cells. A complete picture of perovskite from initial physical uptake of water molecules to final chemical transition to its monohydrate MAPbI3·H2O is obtained with in situ infrared spectroscopy, mass monitoring, and X-ray diffraction. Despite strong affinity of MA to water, MAPbI3 absorbs almost no water from ambient air. Water molecules penetrate the perovskite lattice and share the space with MA up to one H2O per MA at high-humidity levels. However, the interaction between MA and H2O through hydrogen bonding is not established until the phase transition to monohydrate where H2O and MA are locked to each other. This lack of interaction in water-infiltrated perovskite is a result of dynamic orientational disorder imposed by tetragonal lattice symmetry. The apparent inertness of H2O along with high stability of perovskite in an ambient environment provides a solid foundation for its long-term application in solar cells and optoelectronic devices.
All-solid-state sodium batteries require chemical and electrochemical compatibility between cathode materials and solid-state sodium-ion electrolytes for a stable cycling performance. In their Communication on page 2630 ff., Y. Yao et al. report a solid-state sodium battery with record-high cycling stability and one of the highest specific energies based on an organic quinone (Na4C6O6) as the cathode material that is compatible with sulfide electrolytes. All-solid-state sodium batteries require chemical and electrochemical compatibility between cathode materials and solid-state sodium-ion electrolytes for a stable cycling performance. In their Communication on page 2630 ff., Y. Yao et al. report a solid-state sodium battery with record-high cycling stability and one of the highest specific energies based on an organic quinone (Na4C6O6) as the cathode material that is compatible with sulfide electrolytes. Fluxional Molecules Porphycenes SuFEx Chemistry
Background: Acute lung injury (ALI) caused by hypobaric hypoxia (HH) is frequently observed in high-altitude areas, and it is one of the leading causes of death in high-altitude-related diseases due to its rapid onset and progression. However, the pathogenesis of HH-related ALI (HHALI) remains unclear, and effective treatment approaches are currently lacking.
Attaining stable cathode-solid electrolyte interfaces is a great challenge in sulfide-based all-solid-state sodium batteries (ASSSBs). Currently, these ASSSBs experience low specific energy and poor cycling performance due to the interfacial incompatibility between cathode materials and sulfide electrolytes. A resistive layer forms at the interface when cathode is charged above the anodic stability potential of sulfide electrolyte, e.g. Na 3 PS 4 . In addition, most previous cathodes have been too rigid to accommodate cycling-induced volume change, resulting in poor interparticle contact. Herein, we demonstrate the capability of an organic cathode material, pyrene-4,5,9,10-tetraone (PTO), to enable a high-energy, high-power, and long-cycle-life ASSSB. We report for the first time a reversible cathode-electrolyte interfacial resistance evolution during the cycling of an all-solid-state battery, as the consequence of reversible conversion between conductive Na 3 PS 4 phase and resistive Na 4 P 2 S 8 phase, which occurs within the operation potential range of PTO. We further show PTO is capable of overcoming mechanical failures and maintaining intimate interparticle contact during cycling partially due to its low Young’s modulus (4.2 ± 0.2 GPa). The PTO-based ASSSB exhibits a high specific energy (587 Wh kg - 1 ) at the active-material level and an 89% capacity retention over 500 cycles, a record cycling stability among all ASSSBs reported to date. This work reveals an effective cathode design strategy toward compatibility with solid electrolytes and thus high-performance ASSSBs.
All-solid-state sodium batteries (ASSSBs) with nonflammable electrolytes and ubiquitous sodium resource are a promising solution to the safety and cost concerns for lithium-ion batteries. However, the intrinsic mismatch between low anodic decomposition potential of superionic sulfide electrolytes and high operating potentials of sodium-ion cathodes leads to a volatile cathode-electrolyte interface and undesirable cell performance. Here we report a high-capacity organic cathode, Na4 C6 O6 , that is chemically and electrochemically compatible with sulfide electrolytes. A bulk-type ASSSB shows high specific capacity (184 mAh g-1 ) and one of the highest specific energies (395 Wh kg-1 ) among intercalation compound-based ASSSBs. The capacity retentions of 76 % after 100 cycles at 0.1 C and 70 % after 400 cycles at 0.2 C represent the record stability for ASSSBs. Additionally, Na4 C6 O6 functions as a capable anode material, enabling a symmetric all-organic ASSSB with Na4 C6 O6 as both cathode and anode materials.
'/%3e%3cuse xlink:href='%23a' transform='rotate(23.036 .093 25.536)'/%3e%3cuse xlink:href='%23a' transform='rotate(45.87 1.273 16.18)'/%3e%3cuse xlink:href='%23a' transform='rotate(69.945 .996 12.078)'/%3e%3cuse xlink:href='%23a' transform='rotate(20.66 -19.689 31.932)'/%3e%3c/svg%3e)