期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 57, 期 24, 页码 7046-7050出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201800479
关键词
batteries; energy-storage materials; fast ion conduction; ion selectivity; selective cation channels
资金
- Shenzhen Science and Technology Research Grant [JCYJ20160531141109132, JCYJ20170412150450297]
- National Natural Science Foundation of China [21622407, 21673008]
- Guangdong Innovative and Entrepreneurial Research Team Progress [2013N080]
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 160mAhg(-1) at a 0.5C rate. Considerable capacity retention of 94.3% is also obtained after 1000cycles at even 60C rate. Meanwhile, high energy density of 69.6Whkg(-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.
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