文献类型：期刊文献

英文题名：In-Situ Lattice Tunnel Intercalation of Vanadium Pentoxide for Improving Long-Term Performance of Rechargeable Magnesium Batteries

作者：Yang, Jun[1];Miao, Xiaowei[3];Zhang, Chenrui[3];Zheng, Jihui[2];Sun, Chencheng[2];Zhang, Yu[4];Geng, Hongbo[3]

机构：[1]Jiangsu Univ Sci & Technol, Sch Mat Sci & Engn, 2 Mengxi Rd, Zhenjiang 212003, Jiangsu, Peoples R China;[2]Changshu Inst Technol, Sch Elect & Informat Engn, 99 Hushan Rd, Changshu 215500, Jiangsu, Peoples R China;[3]Changshu Inst Technol, Sch Mat Engn, 99 Sanhuan Rd, Changshu 215500, Jiangsu, Peoples R China;[4]East China Univ Sci & Technol, Sch Mech & Power Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2022

卷号：8

期号：4

外文期刊名：CHEMNANOMAT

收录：;EI(收录号：20221011743022);WOS:【SCI-EXPANDED(收录号:WOS:000763534000001)】；

基金：This work was financially supported by the National Natural Science Foundation of China (5180103022109044), Natural Science Foundation of Guangdong Province (Grant No. 2018A030310571). The project was supported by Jiangsu Provincial Founds for the Young Scholars (BK20190978, BK20191026) Natural Science Foundation of Shanghai, China (22ZR1418500).

语种：英文

外文关键词：V2O5; polyaniline; intercalation; pseudocapacitance; magnesium batteries

摘要：Layered V2O5 is a promising and versatile cathode for rechargeable magnesium batteries (RMBs), but its narrow interlayer spacing makes rapid Mg2+ diffusion difficult, resulting in poor electrochemical performance. Herein, a facile and scalable technique is established for tailoring the (001) spacing of V2O5 by in-situ polyaniline polymerization. The intercalated polyaniline molecules operate as pillars in the V2O5 interlayer, providing plentiful storage sites as well as improved cation diffusivities of Mg ion. As expected, by using V2O5/polyaniline as the cathode (anode: Mg metal), a high specific capacity of 361 mAh g(-1) with charging/discharging current density of 20 mA g(-1) can be achieved for RMBs. Besides, V2O5/polyaniline electrode shows favorable rate capability with 103 mAh g(-1) at 500 mA g(-1) (500 cycles) and ultra long-term cycling performance after 5000 cycles. Ex situ X-ray photoelectron spectroscopy is used to study the magnesium storage mechanism of the V2O5/polyaniline electrode.