Electrochemical activation of oxygen atom of SnO2 to expedite efficient conversion reaction for alkaline-ion(Li+/Na+/K+)storages

作     者：Yong Cheng Bingbing Chen Limin Chang Dongyu Zhang Chunli Wang Shaohua Wang Ping Nie Limin Wang Yong Cheng;Bingbing Chen;Limin Chang;Dongyu Zhang;Chunli Wang;Shaohua Wang;Ping Nie;Limin Wang

作者机构：Key Laboratory of Preparation and Applications of Environmental Friendly Materials(Jilin Normal University)Ministry of EducationChangchun 130103China State Key Laboratory of Rare Earth Resource UtilizationChangchun Institute of Applied ChemistryCASChangchun 130022China Department of Energy Science and EngineeringNanjing Tech UniversityNanjing 210000China State Key Laboratory of Metastable Materials Science and TechnologyYanshan UniversityQinhuangdao 066004China 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2023年第16卷第1期

页      面：1642-1650页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：This work is financially supported by the National Key R&D Program of China(No.2017YFE0198100) the National Natural Science Foundation of China(Nos.21975250 and 52072145) Science and Technology Development Program of Jilin Province(No.YDZJ202101ZYTS185) the Open Pogram of Key Laboratory of Preparation and Application of Environmental Friendly Materials(Jilin Normal University),Ministry of Education,China(Nos.2020005 and 2021007) the Open Pogram of State Key Laboratory of Metastable Materials Science and Technology(Yanshan University),China(No.202110) 

主　　题：alkaline-ion storage SnO2 anode conversion reaction electron transfer 

摘      要：SnO2-based anode materials have attracted much attention due to high capacity and relatively mild voltage ***,limited by low initial Coulombic efficiency(ICE)and poor stability,its practical application is still ***,it has been found that compositing carbon or metal particles with SnO2 is an effective strategy to achieve high alkaline-ion *** this strategy may improve the kinetics and ICE of the electrochemical reaction,the specific mechanism has not been clearly *** this work,we found that the invalidation SnO2 may go through two steps:1)the conversion process from SnO2 to Sn and Li2O;2)the collapse of the electrode material resulted from huge volume changes during the alloyed Sn with alkaline *** address these issues,a unique robust Co-NC shell derived from ZIF-67 is introduced,in which the transited metallic Co nanoparticles could accelerate the decomposition of Sn-O and Li-O bonds,thus expedite the kinetics of conversion *** a result,the SnO2@Co-NC electrode achieves a more complete and efficient transfer between SnO2 and Sn phases,possessing a potential to achieve high alkaline-ion(Li+/Na+/K+)storages.