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A Fully Aqueous Hybrid Electrolyte Rechargeable Battery with High Voltage and High Energy Density
Author(s) -
Yuan Xinhai,
Wu Xiongwei,
Zeng XianXiang,
Wang Faxing,
Wang Jing,
Zhu Yusong,
Fu Lijun,
Wu Yuping,
Duan Xiangfeng
Publication year - 2020
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.202001583
Subject(s) - electrolyte , electrochemical window , anode , faraday efficiency , materials science , battery (electricity) , aqueous solution , cathode , electrochemistry , electrode , energy density , chemical engineering , energy storage , voltage , potassium ion battery , electrical engineering , chemistry , lithium vanadium phosphate battery , ionic conductivity , thermodynamics , engineering physics , power (physics) , physics , engineering
Aqueous rechargeable batteries (ARBs) offer advantages in terms of safety, environmental friendliness and cost over their non‐aqueous counterparts. However, the narrow electrochemical stability window of water inherently limits the output voltage and energy density of ARBs. Here, a system with an aqueous hybrid electrolyte containing a Zn anode in alkaline solution and LiMn 2 O 4 cathode in neutral solution is reported. Combining the separated electrode‐electrolyte with a Li + ‐conducting membrane, the potential window is effectively widened to enable an aqueous hybrid electrolyte rechargeable battery (AHERB) above 2.3 V. This battery system delivers a steady energy density of 208 Wh kg −1 (based on the total weight of active materials) at 1.69 C with a high average output voltage up to 2.31 V, cycled for over 1000 cycles with an average Coulombic efficiency of >98%.