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Polarization Switching from Valence Trapping in an Oxo-Bridged Trinuclear Iron Complex.
J Am Chem Soc
January 2025
Institute for Materials Chemistry and Engineering and IRCCS, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan.
Switching electric polarization by external stimuli constitutes a technical foundation for various applications. Here, we reported the observation of polarization-switching behavior in an oxo-bridged mixed-valence complex [FeO(piv)(py)] (piv = pivalate, py = pyridine). Detailed variable-temperature Mössbauer spectral analyses unambiguously confirm the occurrence of an electron localization-delocalization transition between two inequivalent Fe sites.
View Article and Find Full Text PDFPrecursor-Induced Growth of Highly-Oriented Nanowire Arrays.
Small Methods
January 2025
National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing, 210023, P. R. China.
The unique optical, electrical, and thermal properties of 1D nanowires have sparked significant interest in growing high-quality 1D materials. Nanowire arrays and aligned growth offer scalability and maintain anisotropic properties, making them promising for research and applications. However, mass-producing high-quality nanowire arrays remains a challenge.
View Article and Find Full Text PDFUnveiling the Li/Electrolyte Interface Behavior for Dendrite-Free All-Solid-State Lithium Metal Batteries by Operando Nano-Focus WAXS.
Adv Sci (Weinh)
January 2025
TUM School of Natural Sciences, Department of Physics, Chair for Functional Materials, Technical University of Munich, James-Franck-Str. 1, 85748, Garching, Germany.
Poly(ethylene oxide) (PEO)-based solid composite electrolytes suffer from poor conductivity and lithium dendrite growth, especially toward the metallic lithium metal anode. In this study, succinonitrile (SN) is incorporated into a PEO composite electrolyte to fabricate an electrode-compatible electrolyte with good electrochemical performance. The SN-doped electrolyte successfully inhibits the lithium dendrite growth and facilitates the SEI layer formation, as determined by the operando nanofocus wide-angle X-ray scattering (nWAXS), meanwhile, stably cycled over 500 h in Li/SN-PEO/Li cell.
View Article and Find Full Text PDFA High-Capacity Manganese-Metal Battery with Dual-Storage Mechanism.
Angew Chem Int Ed Engl
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University of Science and Technology of China, Applied Chemistry, 96 Jinzhai Road, 230026, Hefei, CHINA.
As a promising post lithium-ion-battery candidate, manganese metal battery (MMB) is receiving growing research interests because of its high volumetric capacity, low cost, high safety and high energy-to-price ratio. However, the low energy density, mainly constrained by scarce choices and unsatisfying capacity of cathodes, strictly bottlenecks the development of MMBs. In this work, a new class of cathodes based on novel dual-storage mechanism (DSM) are reported.
View Article and Find Full Text PDFGiant inverse elastocaloric effect of -alkanes imbedded in a carbon-frame for room temperature thermal management.
Nanoscale
January 2025
School of Physics, Hunan Key Laboratory of Super Microstructure and Ultrafast Process, Hunan Key Laboratory of Nanophotonics and Devices, State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China.
Solid-state refrigeration technology, which utilizes phase transition materials responsive to an external field through which heat is exchanged with the environment, serves as a promising alternative to traditional vapor-compression refrigeration technologies. However, many existing solid-state refrigeration materials are limited by low latent heat, large external driving forces, high thermal hysteresis, or low thermal conductivity, limiting practical applications. In this work, through molecular dynamics simulations and thermodynamic analysis, we predict giant inverse elastocaloric effects in the composited alkane and carbon nanotube/graphene architectures.
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