Asymmetric Zinc-Nitrate/Hydrogen Battery Chemistry Coupling Electrochemical Hydrogen Charge and Energy Storage.
- 1Tianjin Key Laboratory of Advanced Carbon and Electrochemical Energy Storage, School of Chemical Engineering and Technology, and National Industry-Education Integration Platform of Energy Storage, Tianjin University, Tianjin 300350, China.
Abstract
Aqueous zinc-nitrate batteries (ZNBs) have attracted considerable interest because they combine energy storage with nitrate remediation and ammonia production. However, their practical application is hindered by large energy loss during charging, resulting in limited overall energy efficiency. Herein, a rechargeable zinc-nitrate/hydrogen battery (ZNHB) is proposed to couple electrochemical hydrogen utilization with energy storage with asymmetric battery chemistry. During discharge, the ZNHB with a high-entropy catalyst outputs electricity with a peak power density of 15 mW cm-2 and steady ammonia production. While charging, hydrogen is charged into the system and greatly reduces the charging potential to much lower than the discharging potential, simultaneously harvesting electrical energy and hydrogen chemical energy. As a result, the ZNHB achieves an overall energy efficiency of 72.9%, exceeding that of conventional ZNBs. Furthermore, a hydrogen chemical-to-electrical energy efficiency of 62.6% is achieved, demonstrating the effective utilization of hydrogen chemical energy during charging. With this alternate hydrogen-charging and electric outputting design, the rechargeable ZNHB provides a new mode for stationary hydrogen electrochemical charging and electric energy storage.
Related
- MnO2–Co3O4@RGO hybrid nanocomposite-modified carbon paste electrode for sensitive electrochemical detection of hydrogen peroxide in food and edible-oil matrices
- Laser-electrochemical fabrication of nanoporous high-entropy metallic glass films for efficient pH-universal hydrogen evolution
- Deciphering Electrochemical Generation, Transport, and Reactivity of Hydrogen Species in the Electrochemical Palladium Membrane Reactor.
- Asymmetric atomic-level engineering of phosphorus-modified Cu single-atom coordination centers on carbon nitride for enhanced photocatalytic hydrogen evolution
- Catalytic Steam Reforming of Methanol, Ethanol, and Glycerol for Hydrogen Production: A Critical Review of Reaction Chemistry, Catalyst Design, Performance Metrics, and Deactivation
BibTeX
@article{yan2026asymmetric,
title = {{Asymmetric Zinc-Nitrate/Hydrogen Battery Chemistry Coupling Electrochemical Hydrogen Charge and Energy Storage.}},
author = {Zhijie Yan and Xinrong Chen and Chunpeng Yang},
journal = {JACS Au},
year = {2026},
month = sep,
doi = {10.1021/jacsau.6c01152},
url = {https://europepmc.org/article/MED/42953161},
note = {CC BY-NC-ND},
}
RIS
TY - JOUR
TI - Asymmetric Zinc-Nitrate/Hydrogen Battery Chemistry Coupling Electrochemical Hydrogen Charge and Energy Storage.
AU - Zhijie Yan
AU - Xinrong Chen
AU - Chunpeng Yang
PY - 2026
DA - 2026/09/23
JO - JACS Au
DO - 10.1021/jacsau.6c01152
UR - https://europepmc.org/article/MED/42953161
AB - Aqueous zinc-nitrate batteries (ZNBs) have attracted considerable interest because they combine energy storage with nitrate remediation and ammonia production. However, their practical application is hindered by large energy loss during charging, resulting in limited overall energy efficiency. Herein, a rechargeable zinc-nitrate/hydrogen battery (ZNHB) is proposed to couple electrochemical hydrogen utilization with energy storage with asymmetric battery chemistry. During discharge, the ZNHB with a high-entropy catalyst outputs electricity with a peak power density of 15 mW cm-2 and steady ammonia production. While charging, hydrogen is charged into the system and greatly reduces the charging potential to much lower than the discharging potential, simultaneously harvesting electrical energy and hydrogen chemical energy. As a result, the ZNHB achieves an overall energy efficiency of 72.9%, exceeding that of conventional ZNBs. Furthermore, a hydrogen chemical-to-electrical energy efficiency of 62.6% is achieved, demonstrating the effective utilization of hydrogen chemical energy during charging. With this alternate hydrogen-charging and electric outputting design, the rechargeable ZNHB provides a new mode for stationary hydrogen electrochemical charging and electric energy storage.
SN - 2691-3704
ER -