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- Title
Engineering Fast Ion Conduction and Selective Cation Channels for a High‐Rate and High‐Voltage Hybrid Aqueous Battery.
- Authors
Liu, Chunyi; Wang, Xusheng; Deng, Wenjun; Li, Chang; Chen, Jitao; Xue, Mianqi; Li, Rui; Pan, Feng
- Abstract
Abstract: 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 K2FeFe(CN)6 cathode and carbon‐coated NaTi2(PO4)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.
- Subjects
STORAGE batteries; IONIC conductivity; ION channels; HIGH voltages; ELECTRODES; COST effectiveness
- Publication
Angewandte Chemie, 2018, Vol 130, Issue 24, p7164
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201800479