Thermal efficiency of a thermocell made of Prussian blue analogues.
Thermal efficiency of a thermocell made of Prussian blue analogues.
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DOI：
10.1038/s41598-018-33091-w
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发表时间：
2018-10-03
影响因子：
4.6
通讯作者：
Moritomo Y
中科院分区：
文献类型：
--
作者：
Shibata T;Fukuzumi Y;Moritomo Y
最近，据报道，热电池可以通过利用阴极和阳极材料之间的氧化还原电势（V）的热系数（α = dV/dT）的差异将温度转换成电能。在电池材料中，普鲁士蓝类似物（PBAs）是有前途的热电池材料，因为α从NaxMn[Fe（CN）6]0.83 3.5 H2O（NMF 83）中的约-0.3 mV/K变化到NaxCo[Fe（CN）6] 0.92，9 H2O（NCF 90）中的约1.3 mV/K。在这项工作中，我们系统地研究了NMF 83/NCF 90热电池的热效率（η）相对于低温（TL = 282 K）和高温（TH = 292-338 K）之间的差（ΔT）。我们发现热效率（η）随ΔT成比例增加。η的线性增加归因于电池电压（Vcell）和从NCF 90提取的电荷（QNCF 90）的线性增加。在ΔT = 56 K时，η达到3.19%，相当于卡诺效率的19%（η卡诺= 17.0%）。我们进一步证实，QNCF 90的大小是定量再现的NMF 83和NCF 90的放电曲线的斜率。
Recently, it was reported that a thermocell can convert temperature into electric energy by using the difference in the thermal coefficient (α = dV/dT) of the redox potential (V) between the cathode and anode materials. Among battery materials, Prussian blue analogues (PBAs) are promising materials for thermocell, because α changes from approximately −0.3 mV/K in NaxMn[Fe(CN)6]0.83 3.5 H2O (NMF83) to approximately 1.3 mV/K in NaxCo[Fe(CN)6]0.92,9H2O (NCF90). In this work, we systematically investigated the thermal efficiency (η) of the NMF83/NCF90 thermocell relative to the difference (ΔT) between low (TL = 282 K) and high (TH = 292–338 K) temperatures. We found that the thermal efficiency (η) increased proportionally with ΔT. The linear increase in η is ascribed to the linear increase in the cell voltage (Vcell) and the charge (QNCF90) extracted from NCF90. Moreover, η reached 3.19% at ΔT = 56 K, which corresponds to 19% of the Carnot efficiency (ηcarnot = 17.0%). We further confirmed that the magnitude of QNCF90 is quantitatively reproduced by the slopes of the discharge curves of NMF83 and NCF90.
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DOI：
10.1073/pnas.1415097111
发表时间：
2014-12-02
影响因子：
11.1
作者：
Yang, Yuan;Lee, Seok Woo;Chen, Gang
通讯作者：
Chen, Gang
影响因子：
4.6
作者：
Niwa H;Kobayashi W;Shibata T;Nitani H;Moritomo Y
通讯作者：
Moritomo Y
影响因子：
2.3
作者：
Takachi, Masamitsu;Matsuda, Tomoyuki;Moritomo, Yutaka
通讯作者：
Moritomo, Yutaka
影响因子：
4.9
作者：
Lu, Yuhao;Wang, Long;Goodenough, John B.
通讯作者：
Goodenough, John B.
影响因子：
10.8
作者：
Wang, Jianjian;Feng, Shien-Ping;Chen, Gang
通讯作者：
Chen, Gang