Ultrasonic behavior in La2−xBaxCuO4−y polycrystalline superconductor

Rechargeable Na/Na0.44MnO2 cells with ionic liquid electrolytes containing various sodium solutes

“…A variety of compounds, such as oxides [9,26], phosphates [27,28], fluorophosphates [29,30], pyrophosphates [31,32], and cyanoferrates [33,34], have been identified as potential cathodes for NIBs. Among them, manganese-oxide-based materials are attractive because of their low cost and non-toxicity [35,36].…”

Potentiodynamic and galvanostatic testing of NaFe0.95V0.05PO4/C composite in aqueous NaNO3 solution, and the properties of aqueous Na1.2V3O8/NaNO3/NaFe0.95V0.05PO4/C battery

“…Two adjacent anodic peaks and single cathodic peak, which (as measured at scan rate 10 mV s À1 ) are positioned at~0.034 V,~0.24 V,~À0.13 V vs. SCE, respectively, were observed. Such a cyclovoltammogram type is well-documented in the literature related to NaFePO 4 in both organic [32,37,43] and aqueous electrolytes [10,37]. Namely, desodiation оf NaFePO 4 occurs through an intermediate phase formation NaFePO 4 / Na~0 .7 FePO 4 which transforms further to a completely desodiated product Na~0 .7 FePO 4 / FePO 4 , while the sodiation occurs in a unique step FePO 4 / NaFePO 4 [34,39,42].…”

“…Unlike the direct LiFe-PO 4 eFePO 4 phase transition during lithium deinsertion, the NaFePO 4 eFePO 4 phase transition occurs indirectly, via the formation of the intermediate Na~0 . 7 FePO 4 phase, which buffers a large mismatch strain between sodiated and desodiated phase [34,42,43].…”

Synchronous synthesis of a Si/Cu/C ternary nano-composite as an anode for Li ion batteries

“…The analysis and the fitted data for all circuit elements is exhibited in Supporting Information. The R CT , which is known as charge transfer resistance in the electrode/electrolyte interface, 27,28 of bulk Si and Si/Cu/C electrode is 282 and 120 Ω, respectively.…”