Prussian Blue Analogues as Promising Thermal Power Generation Materials
Prussian Blue Analogues as Promising Thermal Power Generation Materials
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DOI：
10.1002/ente.201700952
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发表时间：
2018-08
影响因子：
3.8
通讯作者：
Yuya Fukuzumi;Kaoru Amaha;W. Kobayashi;H. Niwa;Yutaka Mortitomo
中科院分区：
文献类型：
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作者：
Yuya Fukuzumi;Kaoru Amaha;W. Kobayashi;H. Niwa;Yutaka Mortitomo
氧化还原电势(V)的热系数(α=dV/dt)使利用废热进行高效的热力发电成为可能。实际上，电池型热电池是由两种不同α为正负极的可氧化固体组成的，它在热循环中产生电能。为了制备高性能的器件，系统地研究了三种普鲁士蓝类似物(PbAs)中的α对Na+浓度(X)的影响。NCF90的阳性α最高(=1.4 MV K−1)，而NMF83的负α(=−最高(0.4 MV K−1)。此外，NCF90/NMF83型热电池在TL(=286 K)和TH(=313 K)之间的初始循环中产生5.5meV/NCF90。热效率(η=2.3 %)达到卡诺效率的27 %(η卡诺=8.7 %)。因此，聚对苯二甲酸是一种很有前途的火力发电材料。
The thermal coefficient (α=dV/dT) of redox potential (V) enables an efficient thermal power generation using waste heat. Actually, a battery‐type thermocell, which consists of two kinds of redoxable solids with differentαas anode and cathode, is demonstrated to produce electric energy in thermal cycles. To fabricate high performance device,αis systematically investigated in three kinds of Prussian blue analogues (PBAs), NaxCo[Fe(CN)6]0.71(abbreviated as NCF71), NaxCo[Fe(CN)6]0.90(NCF90) and NaxMn[Fe(CN)6]0.83(NMF83), against the Na+concentration (x). NCF90 shows the highest positiveα(=1.4 mV K−1) in the lower‐lying plateau while NMF83 shows the highest negativeα(=−0.4 mV K−1) in the lower‐lying plateau. In addition, the NCF90/NMF83 thermocell produces 5.5 meV/NCF90 in the initial cycle betweenTL(=286 K) andTH(=313 K). The thermal efficiency (η=2.3 %) reaches 27 % of the Carnot efficiency (ηcarnot=8.7 %). Thus, PBAs are promising materials for thermal power generation.