Layered Birnessite Cathode with a Displacement/Intercalation Mechanism for High-Performance Aqueous Zinc-Ion Batteries

作     者：Xian‑Zhi Zhai Jin Qu Shu‑Meng Hao Ya‑Qiong Jing Wei Chang Juan Wang Wei Li Yasmine Abdelkrim Hongfu Yuan Zhong‑Zhen Yu Xian-Zhi Zhai;Jin Qu;Shu-Meng Hao;Ya-Qiong Jing;Wei Chang;Juan Wang;Wei Li;Yasmine Abdelkrim;Hongfu Yuan;Zhong-Zhen Yu

作者机构：State Key Laboratory of Organic‑Inorganic CompositesCollege of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029People’s Republic of China Beijing Key Laboratory of Advanced Functional Polymer CompositesBeijing University of Chemical TechnologyBeijing 100029People’s Republic of China 

出 版 物：《Nano-Micro Letters》 (纳微快报（英文版）)

年 卷 期：2020年第12卷第4期

页      面：137-151页

核心收录：

学科分类：0808[工学-电气工程] 081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 070301[理学-无机化学] 

基　　金：Financial support from the National Natural Science Foundation of China (51972016, 51533001) the National Key Research and Development Program of China (2016YFC0801302) State Key Laboratory of Organic-Inorganic Composites (oic-201801002) 

主　　题：Zinc-ion batteries Birnessite Sodium ions Layered structure Crystal water 

摘      要：Mn-based rechargeable aqueous zinc-ion batteries(ZIBs)are highly promising because of their high operating voltages,attractive energy densities,and ***,the electrochemical performances of Mn-based cathodes usually suffer from their serious structure transformation upon charge/discharge ***,we report a layered sodium-ion/crystal water co-intercalated Birnessite cathode with the formula of Na0.55Mn2O4·0.57H2O(NMOH)for high-performance aqueous ZIBs.A displacement/intercalation electrochemical mechanism was confirmed in the Mn-based cathode for the first ***+and crystal water enlarge the interlayer distance to enhance the insertion of Zn^2+,and some sodium ions are replaced with Zn^2+ in the first cycle to further stabilize the layered structure for subsequent reversible Zn^2+/H^+ insertion/extraction,resulting in exceptional specific capacities and satisfactory structural ***,a pseudo-capacitance derived from the surface-adsorbed Na^+ also contributes to the electrochemical *** NMOH cathode not only delivers high reversible capacities of 389.8 and 87.1 mA h g^−1 at current densities of 200 and 1500 mA g^−1,respectively,but also maintains a good long-cycling performance of 201.6 mA h g^−1 at a high current density of 500 mA g^−1 after 400 cycles,which makes the NMOH cathode competitive for practical applications.