A safe,low-cost and high-efficiency presodiation strategy for pouch-type sodium-ion capacitors with high energy density  

作　　者：Congkai Sun Xiong Zhang Chen Li Kai Wang Xianzhong Sun Fangyan Liu Zhong-Shuai Wu Yanwei Ma 

机构地区：[1]Institute of Electrical Engineering,Chinese Academy of Sciences,Beijing 100190,China [2]School of Engineering Sciences,University of Chinese Academy of Sciences,Beijing 100049,China [3]Stare Key Laboratory of Catalysis.Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian,Liaoning 116023,China [4]Dalian National Laboratory for Clean Energy,Chinese Academy of Sciences,Dalian,Liaoning 116023,China

出　　处：《Journal of Energy Chemistry》2022年第1期442-450,I0012,共10页能源化学（英文版）

基　　金：supported by the National Science Foundation of China(No.51907193,51822706 and 51777200);the Beijing Natural Science foundation(JQ19012);the Key Research Program of Frontier Sciences,CAS(No.ZDBS-LY-JSC047);the Youth Innovation Promotion Association,CAS(No.2020145);the Dalian National Laboratory for Clean Energy Cooperation Fund,the CAS(Nos.DNL201912,DNL201915).

摘　　要：Sodium-ion capacitors(SICs)have attracted appreciable attention in virtue of the higher energy and power densities compared with their rivals,supercapacitors and sodium-ion batteries.Due to the lack of sodium resources in cathode,presodiation is critical for SICs to further augment performances.However,current presodiation strategy utilizes metallic sodium as the presodiation material.In this strategy,assembling/disassembling of half-cells is required,which is dangerous and in creases the time and cost of SIC leading to the restriction of their industrialization and commercialization.Herein we present a safe,low-cost and high-efficiency presodiation strategy by first employing Na_(2)C_(2)O_(4) as the sacrificial salt applied in SICs.Na_(2)C_(2)O_(4) is environmentally friendly and possesses considerably low expenditure.No additional residues remain after sodium extraction ascribed to its"zero dead mass"property.When paired with commercial activated carb on as the cathode and commercial hard carbon as the ano de,the constructed pouch-type SICs exhibit high energy and power densities of 91.7 Wh/kg and 13.1 kW/kg,respectively.This work shows a prospect of realizing the safe and low-cost manufacturing for high-performance SICs commercially.

关 键 词：Presodiation material Sacrificial salt High efficiency Zero dead mass Sodium-ion capacitors Lithium-ion capacitors 

分 类 号：TQ131.12[化学工程—无机化工] TM53[电气工程—电器]