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Improved Thermal Cyclability of Tertiary Battery Made of Prussian Blue Analogues
Author(s) -
Takahara Izumi,
Shibata Takayuki,
Fukuzumi Yuya,
Moritomo Yutaka
Publication year - 2019
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201902340
Subject(s) - prussian blue , battery (electricity) , cathode , anode , materials science , thermal , redox , cell voltage , thermal analysis , voltage , electrochemistry , inorganic chemistry , analytical chemistry (journal) , chemistry , metallurgy , electrical engineering , organic chemistry , electrode , thermodynamics , physics , power (physics) , engineering
Tertiary battery is charged by the environmental heat, not by the electric energy, by using the difference (Δα) in the thermal coefficient ( α =d V /d T ) of redox potential ( V ) between the anode and cathode materials. The thermal cyclability is not good in the prototypical Na x Co[Fe(CN) 6 ] 0.71 (NCF71)/Na x Co[Fe(CN) 6 ] 0.90 (NCF90) tertiary battery. Here, we significantly improved the thermal cyclability of the tertiary battery with using Ni‐substituted Na x Ni[Fe(CN) 6 ] 0.68 (NNF68). The Ni‐substituted NNF68/NCF90 tertiary battery shows good thermal cyclability: both the cell voltage and capacity essentially unchanged up to the 10th thermal cycles.