Anti-self-discharge ultrathin all-inorganic electrochromic asymmetric supercapacitors enabling intelligent and effective energy storage

作     者：Lei Liu Chen Liu Meng-Ying Wang Bin Li Ke Wang Xiang-Qian Fan Li-Yong Wang Hui-Qi Wang Sheng-Liang Hu Xun-Gang Diao Lei Liu;Chen Liu;Meng-Ying Wang;Bin Li;Ke Wang;Xiang-Qian Fan;Li-Yong Wang;Hui-Qi Wang;Sheng-Liang Hu;Xun-Gang Diao

作者机构：School of Energy and Power EngineeringNorth University of ChinaTaiyuan030051China Shenyang National Laboratory for Materials ScienceInstitute of Metal ResearchChinese Academy of ScienceShenyang110016China School of Energy and Power EngineeringBeihang UniversityBeijing100191China Research Center for PhotovoltaicsShanghai Institute of Space Power-SourcesShanghai200245China National Key Laboratory of Electromagnetic Space SecurityTianjin300308China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2023年第42卷第9期

页      面：2957-2971页

核心收录：

学科分类：080801[工学-电机与电器] 0808[工学-电气工程] 08[工学] 

基　　金：financially supported by the National Natural Science Foundation of China (Nos. 62205311, 52073007, 61875005 and 52011540389) the Fundamental Research Program of Shanxi Province (No. 202103021223177) 

主　　题：Anti-self-discharge Electrochromic Asymmetric supercapacitors(ASCs) All-inorganic Interface 

摘      要：Electrochromic asymmetric supercapacitors(EASs), incorporating electrochromic and energy storage into one platform, are extremely desirable for next-generation civilian portable and smart electronic devices. However, the crucial challenge of their fast self-discharge rate is often overlooked, although it plays an important role in practical application. Unfortunately, very limited research on EAS has focused on this critical problem. Here, an ultrathin all-inorganic EAS with excellent anti-self-discharge performance and superior electrochromic behavior is designed and manufactured by introducing a thin nanofunctional layer at the electrode/electrolyte interface. The prototype all-inorganic EAS exhibited a wide working voltage of 2.2 V, a high energy/power density(81.2mWh·cm^(-3)/0.688 W·cm^(-3)and 30.6 mWh·cm^(-3)/11.02W·cm^(-3)), along with outstanding electrochemical and electrochromic performance even at high ***, the introduced Ta2O5layer can efficiently prohibit the redistribution and diffusion of the movable ions at the fully charged state, endowing the all-inorganic EAS with a tardy self-discharge rate of 12.6 mV·g^(-1),which is an extremely low value when compared with previous reported research. Significantly, the ultrathin allinorganic EASs could also well maintain a slow self-discharge rate and their original electrochemical characteristics under various environmental temperatures. We envision that the novel strategy of electrode/electrolyte interface engineering can effectively deal with the severe self-discharge challenge of EAS, and provide more opportunities for their practical applications.