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High‐Voltage Rechargeable Alkali–Acid Zn–PbO 2 Hybrid Battery
Author(s) -
Xu Yunpeng,
Cai Pingwei,
Chen Kai,
Ding Yichun,
Chen Long,
Chen Weifan,
Wen Zhenhai
Publication year - 2020
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.202012017
Subject(s) - anode , electrochemistry , electrolyte , alkali metal , battery (electricity) , cathode , materials science , electrochemical window , aqueous solution , voltage , lithium (medication) , energy storage , chemical engineering , potassium ion battery , inorganic chemistry , lithium vanadium phosphate battery , electrode , chemistry , electrical engineering , ionic conductivity , power (physics) , organic chemistry , physics , quantum mechanics , endocrinology , engineering , medicine
Abstract Aqueous rechargeable batteries have attracted attention owning to their advantages of safety, low cost, and sustainability, while the limited electrochemical stability window (1.23 V) of water leads to their failure in competition with organic‐based lithium‐ion batteries. Herein, we report an alkali–acid Zn–PbO 2 hybrid aqueous battery obtained by coupling an alkaline Zn anode with an acidic PbO 2 cathode. It shows the capability to deliver an impressively high open‐circuit voltage ( V oc ) of 3.09 V and an operate voltage of 2.95 V at 5 mA cm −2 , thanks to the contribution of expanding the voltage window and the electrochemical neutralization energy from the alkali–acid asymmetric‐electrolyte hybrid cell. The hybrid battery can potentially deliver a large area capacity over 2 mAh cm −2 or a high energy density of 252.39 Wh kg −1 and shows almost no fading in area capacity over 250 charge–discharge cycles.