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Over 2 V Aqueous Sodium‐Ion Battery with Prussian Blue‐Type Electrodes
Author(s) -
Nakamoto Kosuke,
Sakamoto Ryo,
Sawada Yuki,
Ito Masato,
Okada Shigeto
Publication year - 2019
Publication title -
small methods
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 4.66
H-Index - 46
ISSN - 2366-9608
DOI - 10.1002/smtd.201800220
Subject(s) - prussian blue , aqueous solution , anode , inorganic chemistry , electrochemistry , cathode , electrolyte , chemistry , sodium perchlorate , sodium , battery (electricity) , electrode , manganese , organic chemistry , power (physics) , physics , quantum mechanics
High discharge voltage of more than 2 V is achieved in a novel aqueous sodium‐ion battery with the combination of a Prussian blue‐type sodium manganese hexacyanoferrate cathode, and a similar potassium manganese hexacyanochromate anode. Here, a highly concentrated sodium perchlorate aqueous electrolyte with a 2.8 V electrochemical window is used. By element analysis, the novel anode containing little potassium element possibly serves as a suitable host–guest anode, similarly as the cathode extracting/inserting sodium ion in a highly concentrated sodium‐ion aqueous electrolyte. Open‐framework electrodes and a highly concentrated but mobile aqueous electrolyte contribute to high voltage and high rate performance of the aqueous sodium‐ion battery.