Current dependence of output voltage and discharge capacity of a tertiary battery
Source abstract
Abstract
Tertiary batteries (TBs), which can be charged by a temperature change (ΔT), are prospective energy-harvesting devices. In this work, we investigated the variations in the output voltage (VTB) and discharge capacity (QTB) with current (I) of NaxCo[Fe(CN)6]0.87/NaxNi[Fe(CN)6]0.94 TBs (ΔT of 30 K) per unit weight of total active materials at 45 °C. Reflecting the battery resistance R, VTB(I) decreases with increasing I as VTBIRI=VTB0−MRI, where M is the total weight of the active material. We found that QTB(I) had values that were slightly smaller than those obtained by incorporating only the voltage-drop effect, QTBIRI=QTB(0)×VTBIR(I)VTB(0). The deviation between the observed QTB(I) and QTBIR(I) can be accurately explained in terms of the I-induced deformation of the discharge curve.
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Research context
OpenAlex topics: Advancements in Battery Materials · Advanced Battery Materials and Technologies · Advanced Battery Technologies Research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Faculty of Marine Technology, Tokyo University of Marine Science and Technology 1 , Etchujima 2-1-6, Koto-ku, Tokyo 135-8533, Japan
Faculty of Pure and Applied Science, University of Tsukuba 2 , Tennodai 1-1-1, Tsukuba, Ibaraki 305-8571, Japan
Tsukuba Research Center for Energy Materials Science (TREMS), University of Tsukuba 3 , Tennodai 1-1-1, Tsukuba, Ibaraki 305-8571, Japan
Funding
Japan Society for the Promotion of Science · JGC-S Scholarship Foundation · Murata Science Foundation · Yazaki Memorial Foundation for Science and Technology
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