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Engineering Fast Ion Conduction and Selective Cation Channels for a High‐Rate and High‐Voltage Hybrid Aqueous Battery
Author(s) -
Liu Chunyi,
Wang Xusheng,
Deng Wenjun,
Li Chang,
Chen Jitao,
Xue Mianqi,
Li Rui,
Pan Feng
Publication year - 2018
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.201800479
Subject(s) - anode , battery (electricity) , aqueous solution , cathode , electrode , electrochemistry , materials science , ion , high voltage , voltage , chemistry , chemical engineering , electrical engineering , organic chemistry , power (physics) , physics , quantum mechanics , engineering
The rechargeable aqueous metal‐ion battery (RAMB) has attracted considerable attention due to its safety, low costs, and environmental friendliness. Yet the poor‐performance electrode materials lead to a low feasibility of practical application. A hybrid aqueous battery (HAB) built from electrode materials with selective cation channels could increase the electrode applicability and thus enlarge the application of RAMB. Herein, we construct a high‐voltage K–Na HAB based on K 2 FeFe(CN) 6 cathode and carbon‐coated NaTi 2 (PO 4 ) 3 (NTP/C) anode. Due to the unique cation selectivity of both materials and ultrafast ion conduction of NTP/C, the hybrid battery delivers a high capacity of 160 mAh g −1 at a 0.5 C rate. Considerable capacity retention of 94.3 % is also obtained after 1000 cycles at even 60 C rate. Meanwhile, high energy density of 69.6 Wh kg −1 based on the total mass of active electrode materials is obtained, which is comparable and even superior to that of the lead acid, Ni/Cd, and Ni/MH batteries.