Building aqueous K-ion batteries for energy storage

被引：0
作者：
Liwei Jiang
Yaxiang Lu
Chenglong Zhao
Lilu Liu
Jienan Zhang
Qiangqiang Zhang
Xing Shen
Junmei Zhao
Xiqian Yu
Hong Li
Xuejie Huang
Liquan Chen
Yong-Sheng Hu
机构：
[1] Beijing Key Laboratory for New Energy Materials and Devices,Key Laboratory for Renewable Energy
[2] Beijing National Laboratory for Condensed Matter Physics,Center of Materials Science and Optoelectronics Engineering
[3] Institute of Physics,Key Laboratory of Green Process and Engineering
[4] Chinese Academy of Sciences,undefined
[5] University of Chinese Academy of Sciences,undefined
[6] Institute of Process Engineering,undefined
[7] Chinese Academy of Sciences,undefined
[8] Yangtze River Delta Physics Research Center Co. Ltd,undefined
来源：
Nature Energy | 2019年 / 4卷
关键词：
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学科分类号：
摘要：
Aqueous K-ion batteries (AKIBs) are promising candidates for grid-scale energy storage due to their inherent safety and low cost. However, full AKIBs have not yet been reported due to the limited availability of suitable electrodes and electrolytes. Here we propose an AKIB system consisting of an Fe-substituted Mn-rich Prussian blue KxFeyMn1 − y[Fe(CN)6]w·zH2O cathode, an organic 3,4,9,10-perylenetetracarboxylic diimide anode and a 22 M KCF3SO3 water-in-salt electrolyte. The cathode achieves 70% capacity retention at 100 C and a lifespan of over 10,000 cycles due to the mitigation of phase transitions by Fe substitution. Meanwhile, the electrolyte can help decrease the dissolution of both electrodes owing to the lack of free water. The AKIB exhibits a high energy density of 80 Wh kg−1 and can operate well at rates of 0.1–20 C and over a wide temperature range (−20 to 60 °C). We believe that our demonstration could pave the way for practical applications of AKIBs for grid-scale energy storage.
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页码：495 / 503
页数：8
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