Premium
Ultrahigh voltage and energy density aluminum‐air battery based on aqueous alkaline‐acid hybrid electrolyte
Author(s) -
Wen Hejing,
Liu Zhongsheng,
Qiao Jia,
Chen Ronghua,
Qiao Guanjun,
Yang Jianhong
Publication year - 2020
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.5707
Subject(s) - battery (electricity) , electrolyte , voltage , open circuit voltage , energy density , materials science , electricity , high voltage , aqueous solution , electrical engineering , cell voltage , chemical engineering , chemistry , engineering , engineering physics , power (physics) , physics , thermodynamics , electrode
Summary Thanks to the high theoretical capacity and energy density, abundant resource, low‐cost, and environmental friendliness, aluminum‐air battery (AAB) has attracted research interests driven by the promise for electricity generator. However, low operating voltage leads to low practical energy density, and restricting the applications of AAB. In this study, the concept of an ultrahigh voltage AAB based on aqueous alkaline‐acid hybrid electrolyte is introduced and demonstrated. Meanwhile, the working mechanism is investigated. And the open‐circuit voltage of the novel designed battery is 2.56 V, 29.9% higher than conventional alkaline AAB. Thanks to the fluid electrolyte, the decline in discharge voltage caused by the change in pH is overcome. And a high‐energy density of 4591 mWh g Al −1 is achieved at a discharge voltage of around 2.08 V at 10 mA cm −2 . These results provide a viable approach to improve the performance of Al‐air battery.