Seawater Batteries: An Oxygenophilic Atomic Dispersed FeNC Catalyst for Lean‐Oxygen Seawater Batteries (Adv. Energy Mater. 23/2021)

Meng, Rongwei; Zhang, Chen; Lu, Ziyang; Xie, Xinglong; Liu, Yingxin; Tang, Quanjun; Li, Huan; Kong, Debin; Geng, Chuannan; Jiao, Yan; Fan, Zehui; He, Qing; Guo, Yong; Ling, Guowei; Yang, Quan‐Hong

doi:10.1002/aenm.202170085

Cited by 2 publications

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“…Meanwhile, O 2 gains electrons and is reduced to H 2 O, which is further certified by rotating ring-disk electrode (RRDE) measurement (Figure S16, Supporting Information). [31] The PANI@Pt/C samples exhibit a high selectivity toward 4e − ORR. Therefore, the air selfcharging mechanism of Zn/PANI@Pt/C batteries can be expressed by the following half-cell reactions:…”

Section: Resultsmentioning

confidence: 99%

“…Thus, the actual electrode potential of ORR is much lower than the standard potential (1.23 V). [ 31 ] Consequently, the redox potential difference between PANI and O 2 is decreased, reducing the driving force of the reaction in thermodynamics. As a result, the Zn/PANI batteries exhibit poor self‐charging performance.…”

Section: Resultsmentioning

confidence: 99%

“…Meanwhile, O 2 gains electrons and is reduced to H 2 O, which is further certified by rotating ring‐disk electrode (RRDE) measurement (Figure S16, Supporting Information). [ 31 ] The PANI@Pt/C samples exhibit a high selectivity toward 4e − ORR. Therefore, the air self‐charging mechanism of Zn/PANI@Pt/C batteries can be expressed by the following half‐cell reactions:

\begin{eqnarray}&& \mathrm{PANI}-\textit{yZn}\ +\left(2x-y\right)\mathrm{Zn}{\left({\mathrm{CF}}_{3}{\mathrm{SO}}_{3}\right)}_{2}\ \to \mathrm{PANI}- \nonumber\\ && \left(4x-2y\right){\mathrm{CF}}_{3}{\mathrm{SO}}_{3}+4x{\mathrm{e}}^{-}+2\textit{xZ}{\mathrm{n}}^{2+} \end{eqnarray}

\begin{equation} x{\mathrm{O}}_{2}+4x{\mathrm{H}}^{+}+4x{\mathrm{e}}^{-}=2x{\mathrm{H}}_{2}\mathrm{O} \end{equation}

…”

Section: Resultsmentioning

confidence: 99%

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An Ultrafast Air Self‐Charging Zinc Battery

Su,

Zhang,

Wang

et al. 2023

Advanced Materials

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Air self‐charging power systems possess the capability of energy harvesting, conversion and storage simultaneously. However, in general, their self‐charging rate is slow and the batteries cannot be oxidized to the fully charged state due to the weak oxidizability of O2. Herein, we designed an ultrafast air self‐charging aqueous zinc battery by constructing a PANI@Pt/C composite cathode. The introduction of Pt/C catalyst endows the redox reaction between PANI and O2 with fast reaction kinetics and extended redox potential difference. Therefore, the self‐charging rate of the Zn/PANI@Pt/C batteries is effectively accelerated and they can be self‐charged to fully charged state. Furthermore, the PANI can be recharged by O2 simultaneously during discharging process to compensate the consumed electrical energy, achieving prolonged energy supply. In addition, the PANI@Pt/C cathodes can be directly used as the cathodes of flexible self‐charging zinc batteries due to their excellent mechanical properties. As a proof of concept, flexible soft‐packaged Zn/PANI@Pt/C batteries were fabricated and displayed stable electrochemical performance and self‐rechargeability even at different bending states. This work provides a route to design ultrafast chemical self‐charging energy storage devices and broadens the horizons of flexible energy storage devices.This article is protected by copyright. All rights reserved

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

\begin{eqnarray}&& \mathrm{PANI}-\textit{yZn}\ +\left(2x-y\right)\mathrm{Zn}{\left({\mathrm{CF}}_{3}{\mathrm{SO}}_{3}\right)}_{2}\ \to \mathrm{PANI}- \nonumber\\ && \left(4x-2y\right){\mathrm{CF}}_{3}{\mathrm{SO}}_{3}+4x{\mathrm{e}}^{-}+2\textit{xZ}{\mathrm{n}}^{2+} \end{eqnarray}

\begin{equation} x{\mathrm{O}}_{2}+4x{\mathrm{H}}^{+}+4x{\mathrm{e}}^{-}=2x{\mathrm{H}}_{2}\mathrm{O} \end{equation}

…”

Section: Resultsmentioning

confidence: 99%

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An Ultrafast Air Self‐Charging Zinc Battery

Su,

Zhang,

Wang

et al. 2023

Advanced Materials

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show abstract

“…33,34 In addition to the manufacturing method, the electronic optimization of Fe-N-C is another decisive factor to their ORR performance. 35,36 According to previous research studies, heterodoping atoms or dual metal sites could be introduced to modulate the electronic structures of Fe-N-C. [37][38][39] However, insufficient attention has been put on the types of N atoms that coordinate with the Fe species. Typically, four types of N congurations (pyridinic N, pyrrolic N, graphitic N and oxidized N) can be doped in the carbon matrix.…”

Section: Introductionmentioning

confidence: 99%