Phys.org November 30, 2024 Researchers in Italy investigated the performance of a one-dimensional dimerized chain as a spin quantum battery. Integrable model showed a rich quantum phase diagram that emerged through a mapping of the spins onto auxiliary fermionic degrees of freedom. They used a charging protocol relying on the double quench of an internal parameter, the strength of the dimerization, and addressed the energy stored in the systems. They observed three distinct regimes, depending on the timescale characterizing the duration of the charging: a short-time regime related to the dynamics of the single dimers, a long-time regime related to […]
Tag Archives: Solid-state battery
Solid electrolyte composed of nanoparticles shows promise for all-solid-state batteries
Phys.org October 2, 2024 Halide solid electrolytes are promising for improving the electrochemical performance of all-solid-state batteries. However, the state-of-the-art sodium-ion-conducting halides are not as high in conductivity as expected and lack reduction stability. Researchers in Japan found oxychlorides in a ternary system NaCl–TaCl5–Ta2O5 have high conductivities, formabilities, and oxidation and reduction stabilities. They mechanochemically prepared samples composed of NaCl and Ta2O5 nanoparticles embedded in an Na–Ta–Cl–O amorphous matrix, possessing ionic conductivities of 2.5 × 10–3 S cm–1 at 25 °C and electrochemical potential windows of 0.4–4.1 versus Na+/Na. Compression tests revealed that the nanoparticles in the oxychloride electrolytes improved […]
Scientists reduce all-solid-state battery resistance by heating
Science Daily January 7, 2022 The interface between the positive electrode and solid electrolyte in an all-solid state battery shows a large electrical resistance, and the resistance increases when the electrode surface is exposed to air, degrading the battery capacity and performance. Researchers in Japan demonstrated that drastic reduction of the resistance is achievable by annealing the entire battery cell. Exposing the LiCoO2 positive electrode surface to H2O vapor increases the resistance by more than 10 times (to greater than 136 Ω cm2). The magnitude can be reduced to the initial value (10.3 Ω cm2) by annealing the sample in […]
Pathways toward realizing the promise of all-solid-state batteries
Nanowerk March 13, 2020 Though promising all-solid-state batteries (ASSBs) still face barriers that limit their practical application such as poor interfacial stability, scalability challenges and production safety. In this review article researchers at UC San Diego seek to evaluate solid-state electrolytes beyond conventional factors and offer a perspective on various bulk, interface and nanoscale phenomena that require urgent attention within the scientific community. They provide a realistic assessment of the current state-of-the-art characterization techniques and evaluate future full cell ASSB prototyping strategies. They hope to offer rational solutions to overcome some major fundamental obstacles faced by the ASSB community, as […]