A presodiation strategy with high efficiency by utilizing low-price and eco-friendly Na2CO3 as the sacrificial salt towards high-performance pouch sodium-ion capacitors

被引：24
作者：
Sun, Congkai [1 ,2 ]
Zhang, Xiong [1 ,2 ,3 ]
Li, Chen [1 ,3 ]
Wang, Kai [1 ,2 ,3 ]
Sun, Xianzhong [1 ,3 ]
Ma, Yanwei [1 ,2 ,3 ]
机构：
[1] Chinese Acad Sci, Inst Elect Engn, Beijing 100190, Peoples R China
[2] Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
[3] Inst Elect Engn & Adv Electromagnet Drive Technol, Jinan 250013, Peoples R China
来源：
JOURNAL OF POWER SOURCES | 2021年 / 515卷
基金：
中国国家自然科学基金; 北京市自然科学基金;
关键词：
Na2CO3; Supercapacitor; Presodiation; Sacrificial salt; Lithium-ion capacitor; Sodium-ion capacitor; LI-ION; RAMAN; SUPERCAPACITORS; FLEXIBILITY; ELECTROLYTE; CATHODE; STORAGE; WATER; COST; SAFE;
D O I：
10.1016/j.jpowsour.2021.230628
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Sodium-ion capacitor (SIC) bridges the gap between sodium-ion battery (SIB) and supercapacitor (SC). It can exhibit high energy density than SC and deliver high power density and cyclic property than SIB. However, the advancement of SIC is restricted by presodiation. We present a presodiation strategy with high efficiency for pouch SIC by utilizing low-price and eco-friendly Na2CO3 as the presodiation material. With a high capacity utilization (82.6%), Na2CO3 displays a specific capacity of 417.1 mAh g(-1). The constructed pouch SIC with Na2CO3 as the presodiation material exhibits a superior performance: 103 Wh kg(-1), 13 kW kg(-1) and a capacitance retention of 84.5% after 2000 cycles.
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页数：8
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