TY - JOUR
T1 - Novel High-Energy-Density Rechargeable Hybrid Sodium-Air Cell with Acidic Electrolyte
AU - Kang, Yao
AU - Su, Fengmei
AU - Zhang, Qingkai
AU - Liang, Feng
AU - Adair, Keegan R.
AU - Chen, Kunfeng
AU - Xue, Dongfeng
AU - Hayashi, Katsuro
AU - Cao, Shan Cecilia
AU - Yadegari, Hossein
AU - Sun, Xueliang
N1 - Funding Information:
This work was financially supported by the National Natural Science Foundation of China (51704136 and 11765010), the Open Project of the State Key Laboratory of Rare Earth Resource Utilization (RERU2016019), and the Applied Basic Research Programs of Yunnan Provincial Science and Technology Department (2016FB087). This research was supported by Natural Sciences and Engineering Research Council of Canada, Canada Research Chair Program, and the University of Western Ontario.
Publisher Copyright:
© 2018 American Chemical Society.
PY - 2018/7/18
Y1 - 2018/7/18
N2 - Low-cost, high-energy-density, and highly efficient devices for energy storage have long been desired in our society. Herein, a novel high-energy-density hybrid sodium-air cell was fabricated successfully on the basis of acidic catholytes. Such a hybrid sodium-air cell possess a high theoretical voltage of 3.94 V, capacity of 1121 mAh g-1, and energy density of 4418 Wh kg-1. First, the buffering effect of an acidic solution was demonstrated, which provides relatively long and stable cell discharge behaviors. Second, the catholytes of hybrid sodium-air cells were optimized systematically from the solutions of 0.1 M H3PO4 + 0.1 M Na2SO4 to 0.1 M HAc + 0.1 M NaAc and it was found that the cells with 0.1 M H3PO4 + 0.1 M Na2SO4 displayed a maximum power density of 34.9 mW cm-2. The cell with 0.1 M H3PO4 + 0.1 M Na2SO4 displayed higher discharge capacity of 896 mAh g-1. Moreover, the fabricated acidic hybrid sodium-air cells exhibited stable cycling performance in ambient air and they delivered a low voltage gap around 0.3 V when the current density is 0.13 mA cm-2, leading to a high energy efficiency up to 90%. Therefore, the present study provides new opportunities to develop highly cost-effective energy storage technologies.
AB - Low-cost, high-energy-density, and highly efficient devices for energy storage have long been desired in our society. Herein, a novel high-energy-density hybrid sodium-air cell was fabricated successfully on the basis of acidic catholytes. Such a hybrid sodium-air cell possess a high theoretical voltage of 3.94 V, capacity of 1121 mAh g-1, and energy density of 4418 Wh kg-1. First, the buffering effect of an acidic solution was demonstrated, which provides relatively long and stable cell discharge behaviors. Second, the catholytes of hybrid sodium-air cells were optimized systematically from the solutions of 0.1 M H3PO4 + 0.1 M Na2SO4 to 0.1 M HAc + 0.1 M NaAc and it was found that the cells with 0.1 M H3PO4 + 0.1 M Na2SO4 displayed a maximum power density of 34.9 mW cm-2. The cell with 0.1 M H3PO4 + 0.1 M Na2SO4 displayed higher discharge capacity of 896 mAh g-1. Moreover, the fabricated acidic hybrid sodium-air cells exhibited stable cycling performance in ambient air and they delivered a low voltage gap around 0.3 V when the current density is 0.13 mA cm-2, leading to a high energy efficiency up to 90%. Therefore, the present study provides new opportunities to develop highly cost-effective energy storage technologies.
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U2 - 10.1021/acsami.8b04278
DO - 10.1021/acsami.8b04278
M3 - Article
C2 - 29932623
AN - SCOPUS:85049258143
SN - 1944-8244
VL - 10
SP - 23748
EP - 23756
JO - ACS Applied Materials and Interfaces
JF - ACS Applied Materials and Interfaces
IS - 28
ER -
