Optimization of electrode parameters of Na Co[Fe(CN)6]0.88/Na Cd[Fe(CN)6]0.99 tertiary battery

An Electrolyte-Free Thermo-Rechargeable Battery Made of Prussian Blue Analog Thin Films

“…Energy-harvesting devices that can efficiently utilize low-temperature environmental heat below 100 • C are attracting attention as an essential technology for achieving carbon neutrality. Among these devices, thermo-rechargeable batteries [1][2][3][4][5][6][7][8][9][10][11][12][13] are promising because they can be charged by changes in the battery's surrounding temperature (T) due to a difference in the temperature coefficient (α = dE/dT) of the redox potential (E) between their cathode (α + ) and anode (α − ) materials. Henceforth, we refer to thermorechargeable batteries consisting of solid active materials as tertiary batteries.…”

“…, where β + (β − ) and r are the β of the cathode (anode) and the weight ratio ( m + m + +m − , where m + (m − ) is the weight of active material in the cathode (anode)), respectively [10]. This equation indicates that optimizing α + (α − ), β + (β − ), and r can lead to maximizing Q TB .…”

“…This equation indicates that optimizing α + (α − ), β + (β − ), and r can lead to maximizing Q TB . Actually, it has been reported that optimizing α, β, and r can increase the Q TB and V TB of a tertiary battery [10]. Thus, there have been many reports of performance improvements in tertiary batteries [7][8][9][10].…”

“…Actually, it has been reported that optimizing α, β, and r can increase the Q TB and V TB of a tertiary battery [10]. Thus, there have been many reports of performance improvements in tertiary batteries [7][8][9][10]. However, these previous studies of tertiary batteries used an electrolyte solution, and the volume of this electrolyte solution has the potential to suppress the thermal response.…”

“…Nano spaces within the framework enable the reversible storage of guest species (Na + and H 2 O) [15,16]. This property of M-PBAs results in various functionalities, such as lithium/sodium/potassium ion secondary batteries , tertiary batteries [5][6][7][8][9][10], electrochromism [46][47][48][49][50][51][52][53], and so on. Shibata et al [48] reported that an all-solid-state ion transfer device, in which only Na + ions but not electrons can pass through the interface, for electrochromic devices can be fabricated with the physical junction of two PBA thin films.…”