Results 121 to 130 of about 10,902 (248)

Hydrogen Halide Gas Sensors: Active Materials, Operation Principles, and Emerging Technologies

open access: yesInterdisciplinary Materials, EarlyView.
This review considers hydrogen halide (HX) gas sensors across functional materials and principles: acoustic, chemical, optical and nanophotonic. The strong acidity and reactivity of HX gases are discussed as constraints for stability and selectivity of these devices.
Xiuzhen Liu   +12 more
wiley   +1 more source

Neural Network Predictive Control for Vanadium Redox Flow Battery

open access: yesJournal of Applied Mathematics, 2013
The vanadium redox flow battery (VRB) is a nonlinear system with unknown dynamics and disturbances. The flowrate of the electrolyte is an important control mechanism in the operation of a VRB system.
Hai-Feng Shen   +3 more
doaj   +1 more source

One‐Step Solvothermal Synthesis of VS4@PC/rGO for High‐Performance Symmetric Supercapacitors

open access: yesMetalMat, EarlyView.
VS4@PC/rGO ternary composites featuring a 3D skewer‐like structure have been synthesized via a facile one‐step in situ solvothermal approach. The assembled SSC device has a 1.4 V voltage window, achieves 46.1 Wh·kg−1 energy density at 374.8 W·kg−1, and demonstrates excellent long‐cycle stability.
Zhou Yu   +8 more
wiley   +1 more source

High‐Voltage Cathode Materials for Sodium‐Ion Batteries: Advances and Challenges

open access: yesSmall, EarlyView.
This review explores the role of high‐voltage cathode materials in enhancing the performance of SIBs. It focuses on strategies to improve energy density, rate capacity, and stability, addressing challenges like phase transitions, metal migration, and electrolyte degradation.
Congqi Ren, Yulian Dong, Yong Lei
wiley   +1 more source

Zirconium carbide as an electrocatalyst for the chromous-chromic redox couple [PDF]

open access: yes, 1981
Zirconium carbide is used as a catalyst in a REDOX cell for the oxidation of chromous ions to chromic ions and for the reduction of chromic ions to chromous ions.
Gahn, R. F., Reid, M. A., Yang, C. Y.
core   +1 more source

Engineering Metastability in Atomic Layer Deposition: Polymorph and Valence Control

open access: yesSmall, EarlyView.
This work presents strategies for stabilizing two types of metastable phases: structural polymorphs and multivalence states via ALD. These approaches focus on lowering the energy barriers required for metastable phase formation, enabling access to metastable states beyond the thermodynamic limits imposed by the low‐temperature conditions of ALD.
Jihoon Jeon   +4 more
wiley   +1 more source

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