文献类型：期刊文献

英文题名：Nature of Novel 2D van der Waals Heterostructures for Superior Potassium Ion Batteries

作者：Wang, Jue[1,2];Wang, Bin[3];Lu, Bingan[1]

第一作者：Wang, Jue

通讯作者：Lu, BA[1]

机构：[1]Hunan Univ, Sch Phys & Elect, Changsha 410082, Peoples R China;[2]Cent South Univ, Coll Chem & Chem Engn, Changsha 410083, Peoples R China;[3]Xinxiang Univ, Phys & Elect Engn Dept, Xinxiang 453003, Henan, Peoples R China

第一机构：Hunan Univ, Sch Phys & Elect, Changsha 410082, Peoples R China

通讯机构：[1]corresponding author), Hunan Univ, Sch Phys & Elect, Changsha 410082, Peoples R China.

年份：2020

卷号：10

期号：24

外文期刊名：ADVANCED ENERGY MATERIALS

收录：;EI(收录号：20201908619972);Scopus(收录号：2-s2.0-85084203401);WOS:【SCI-EXPANDED(收录号:WOS:000529915600001)】；

基金：This work was financially supported by National Nature Science Foundation of China (Grant Nos. 51922038, 51672078, 21905087, and U1904198), Hunan Outstanding Youth Talents (Grant No. 2019JJ20005), and Henan Science and Technology Program (Grant No. 192102310467).

语种：英文

外文关键词：2D heterostructures; anodes; element engineering; potassium ion batteries; van der Waals heterostructures

摘要：Novel 2D van der Waals heterostructures with innovative bimetallic oxychloride (Bi- and Sb-based oxychloride) nanosheets that are well dispersed on reduced graphene oxide nanosheets, are established through element engineering for superior potassium ion battery (PIBs) anodes. This material displays an exceptional electrochemical performance, obtaining a discharge capacity as high as 360 mAh g(-1) at 100 mA g(-1) after running 1000 cycles for over 9 months with a capacity preservation percentage of 88.5% and achieving a discharge capacity as high as 319 mAh g(-1) at 1000 mA g(-1), in addition to the low charge/discharge plateaus for anodes and promising full cell performance. More significantly, the nature of such 2D van der Waals heterostructures, including the element engineering for morphology control, the function of each component of heterostructures, the mechanism of potassium ion storage, and the process of K+ intercalation accompanied with the lattice distortion and chemical bond breakages, is explored in depth. This study is critical for not only paving the way for the practical application of PIBs but also shedding light on fundamentals of potassium ion storage in 2D van der Waals heterostructures.