Wiley Online Library : Advanced Energy Materials
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Comprehensive Dopant Screening in Li7La3Zr2O12 Garnet Solid Electrolyte

Doping garnet solid electrolytes is well known to promote ionic conductivity. Here, 59 different dopants are found to impact all key intrinsic properties. Critical current densities are found to correlate strongly to low voltage stability, while electronic conductivity plays no discernible role. While defect energies do not predict the ability to...

Wed Apr 17, 2024 12:30
Self‐Sacrificial Template Synthesis of Fe‐N‐C Catalysts with Dense Active Sites Deposited on A Porous Carbon Network for High Performance in PEMFC

A Fe-N-C catalyst with a porous network structure integrated with high active site density is constructed via iron deposition on a porous Zn-N-C substrate. The Zn-N-C substrate derived from the epitaxial growth of ZIF-8s onto g-C3N4 consequently imparts excellent mass transport through the resulting Fe-N-C catalyst layer. A cathode comprising this...

Wed Apr 17, 2024 12:30
Raisins in a Hydrogen Pie: Ultrastable Cesium and Rubidium Polyhydrides

How to increase the hydrogen content in metal hydrides? A possible solution is to prepare them at high pressure from metal amidoboranes and then decompress the reaction products. In this way, cesium (CsH7, CsH15-17) and rubidium (RbH8-9) polyhydrides with a hydrogen content up to 93 at.% are synthesized. These compounds remain stable near or even...

Wed Apr 17, 2024 12:30
Assessing Key Issues Contributing to the Degradation of NCM‐622 || Cu Cells: Competition Between Transition Metal Dissolution and “Dead Li” Formation

This study reports a systematic evaluation on NCM-622 || Cu cells with regard to transition metal dissolution and ‘dead Li’. The mechanisms are studied quantitatively and qualitatively through inductively coupled plasma i.e., optical emission spectroscopy and mass spectrometry. The ‘dead Li’ influence is analyzed quantitatively by using the gas chromatography...

Tue Apr 16, 2024 12:40
Nanofibrous Covalent Organic Frameworks Based Hierarchical Porous Separators for Fast‐Charging and Thermally Stable Lithium Metal Batteries

Nanofibrous covalent organic framework-based separators with well-designed hierarchical porous channels and thermal stability are developed to effectively regulate mass transport for achieving rapid and uniform lithium-ions transport. The assembled lithium metal batteries with a high capacity of 97.2 mAh g−1 deliver 300 cycles under 30 C at the temperature...

Sun Apr 14, 2024 12:35
Iodine Modulates the MACl‐Assisted Growth of FAPbI3 for High Efficiency Perovskite Solar Cells

The incorporation of iodine (I2) is shown to modulate the methylammonium chloride (MACl)-assisted growth of α-phase formamidinium perovskite (α-FAPbI3), with a delayed release of volatile MACl and suppressed cation side reaction. The optimized device delivers an efficiency of 25.2% with an impressive fill factor (FF) of 84.2%, which is attributed...

Sun Apr 14, 2024 12:35

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