•Journal•ISSN: 1344-3542
Electrochemistry
The Electrochemical Society of Japan
About: Electrochemistry is an academic journal. The journal publishes majorly in the area(s): Lithium & Electrolyte. It has an ISSN identifier of 1344-3542. It is also open access. Over the lifetime, 2526 publications have been published receiving 16932 citations.
Topics: Lithium, Electrolyte, Electrode, Ionic liquid, Anode
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TL;DR: In this article, a discharged product formed on a cathode was investigated by TEM observation and FT-IR spectroscopy and it was found that the main product formed in discharge was not an ideal compound, Li2O2, but was carbonate species issued from the decomposition of carbonate-based electrolyte solvent.
Abstract: Rechargeable Li-air battery is a candidate for post Li-ion battery with high energy density. In this paper, the rechargeability of Li-air battery over 100 cycles was confirmed and its capacity retention over 60% was achieved. Nevertheless, a large voltage gap between the discharge-charge profiles was observed. Here, a discharged product formed on a cathode was investigated by TEM observation and FT-IR spectroscopy. It was found that the main product formed in discharge was not an ideal compound, Li2O2, but was carbonate species issued from the decomposition of carbonate-based electrolyte solvent.
384 citations
Journal Article•
TL;DR: In this article, the authors consider what happens when electrodes (zinc and copper in Davy's experiment) are immersed in electrolyte solutions and connected via an external metallic conductor, such an arrangement is a typical electrochemical cell.
Abstract: Introduction In 1812 Humphry Davy wrote: “If a piece of zinc and a piece of copper be brought in contact with each other, they will form a weak electrical combination, of which the zinc will be positive, and the copper negative; this may be learnt by the use of a delicate condensing electrometer”. One can consider what happens when electrodes (zinc and copper in Davy’s experiment) are immersed in electrolyte solutions and connected via an external metallic conductor. Such an arrangement is a typical electrochemical cell.
354 citations
TL;DR: In this paper, the performance of O3-type NaFeO2 was examined as positive electrode material for rechargeable sodium batteries and it was shown that the degradation of electrode performance is due to irreversible structural change, possibly accompanied by iron ion migration in layered host structures.
Abstract: Single phase, well-crystallized O3-type NaFeO2 (alpha NaFeO2) is prepared by a solid-state method. Electrode performance of O3-type NaFeO2 is examined as positive electrode materials for rechargeable sodium batteries. O3type NaFeO2 can deliver 80–100mAhg−1 of reversible capacity with a nearly flat voltage profile at approximately 3.3V vs. Na metal. The electrode performance is significantly deteriorated by oxidation beyond x > 0.5 in Na1−xFeO2. X-ray diffraction study reveals that loss of electrode reversibility originates from irreversible structural change, possibly accompanied by iron ion migration in layered host structures. The sodium ion insertion into the host structures would be disturbed by the irreversible structural change when charged beyond x > 0.5 in Na1−xFeO2. Acceptable cyclability is, therefore, achieved for O3-type NaFeO2 as the positive electrode materials in the limited composition of x = 0–0.45 in Na1−xFeO2. © The Electrochemical Society of Japan, All rights reserved.
318 citations
224 citations
211 citations