The effective use of energy from sustainable sources is considered a crucial step on the way to a CO-neutral economy. Low-grade waste heat (<100 °C) is widely and ubiquitously available, but difficult to convert into electrical energy with current technologies. Here, we demonstrate an electrochemical cell capable of directly converting ambient temperature fluctuations into electricity. Based on intercalation reactions with different entropies, any temperature change leads to a cell voltage and electrical energy can be extracted. The new cell concept features the advantages of thermo-electrochemical cells and pyroelectric-like energy harvesting, which opens a wide range of possibilities for effective and sustainable use of low-grade waste heat.
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http://dx.doi.org/10.1039/d1cc06121f | DOI Listing |
Biosensors (Basel)
December 2024
Department of Biomedical-Chemical Engineering, The Catholic University of Korea, Bucheon 14662, Republic of Korea.
In the biosensor field, the accurate detection of contagious disease has become one of the most important research topics in the post-pandemic period. However, conventional contagious viral biosensors normally require chemical modifications to introduce the probe molecules to nucleic acids such as a redox indicator, fluorescent dye, or quencher for biosensing. To avoid this complex chemical modification, in this research, mismatched DNA with an intercalated metal ion complex (MIMIC) is employed as the probe sequence.
View Article and Find Full Text PDFAdv Sci (Weinh)
December 2024
Department of Materials Science and Engineering, Stanford University, Stanford, CA, 94305, USA.
The unique layer-stacking in two-dimensional (2D) van der Waals materials facilitates the formation of nearly degenerate phases of matter and opens novel routes for the design of low-power, reconfigurable functional materials. Electrochemical ion intercalation between stacked layers offers a promising approach to stabilize bulk metastable phases and to explore the effects of extreme carrier doping and strain. However, in situ characterization methods to study the structural evolution and dynamical functional properties of these intercalated materials remains limited.
View Article and Find Full Text PDFAngew Chem Int Ed Engl
December 2024
Karlsruher Institut für Technologie, Helmholtz Institute Ulm (HIU) Electrochemical Energy Storage, GERMANY.
Next-generation battery technologies need to consider their environmental impact throughout the whole cycle life, which has brought new chemistries based on earth-abundant elements to the spotlight. Rechargeable calcium batteries are such an emerging technology, which shows the potential to provide high cell voltage and high energy density close to lithium-ion batteries. Additionally, the use of Ca2+ as a charge carrier renders significant sustainable values.
View Article and Find Full Text PDFChem Asian J
November 2024
Department of Physics, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jalan Ganesha 10, Bandung, 40132, Indonesia.
Nickel-rich cobalt-free LiNiMnAlO (NMA955) is considered a promising cathode material to address the scarcity and soaring cost of cobalt. Particle size and elemental composition significantly impact the electrochemical performance of NMA955 cathodes. However, differences in precipitation rates among metal ions coveys a challenge in obtaining cathode materials with the desired particle size and composition via hydroxide co-precipitation synthesis.
View Article and Find Full Text PDFTalanta
February 2025
State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, 710049, China. Electronic address:
MXene materials have exhibited potential in electrochemistry, particularly in gas sensing, due to their excellent conductivity, large specific surface area of layered materials, and unique functional groups. However, the gas sensing performance of intrinsic 2D MXene materials is often limited by their fluorine-containing terminals and interfacial structure. In this study, based on intrinsic TiCT, we employed alkali treatment and annealing to prepare oxygen-rich TiC(OH)/TiCO with expanded interlayer spacing, achieving enhanced gas sensing performance for NH.
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