作成者 |
|
|
|
|
|
本文言語 |
|
出版者 |
|
|
発行日 |
|
収録物名 |
|
巻 |
|
号 |
|
開始ページ |
|
出版タイプ |
|
アクセス権 |
|
権利関係 |
|
権利関係 |
|
関連DOI |
|
関連URI |
|
関連HDL |
|
概要 |
The local pH values in the close vicinity of the cathode/anode were experimentally determined to be strongly acidic/weakly basic, respectively, during the operation of a high-voltage aqueous sodium-io...n battery with Prussian blue-type electrodes and a concentrated aqueous electrolyte. The observed pH gradient was ascribed to O_2/H_2 evolution at the cathode/anode in aqueous cells, which should contribute to the expansion of the electrochemical window if the pH gradient is maintained. An increase in the distance between the cathode and anode proved to be one of possible solution to suppress the undesired pH neutralization. On the other hand, the reduction of water as well as the dissolved O_2 in the electrolyte may diminish the capacity of the anode by a self-discharge. This became more pronounced if the full cell was left to stand for a longer time after charging.続きを見る
|