Dual-stage K+ ion intercalation in V2O5-conductive polymer composites

被引：14

作者：

Charles, Daniel S. ^{[1
]}

Guo, Fenghua ^{[1
]}

Shan, Xiaoqiang ^{[1
]}

Kim, SaeWon ^{[1
]}

Lebens-Higgins, Zachary W. ^{[2
]}

Xu, Wenqian ^{[3
]}

Su, Dong ^{[4
,5
]}

Piper, Louis F. J. ^{[2
]}

Teng, Xiaowei ^{[1
]}

机构：

[1] Univ New Hampshire, Dept Chem Engn, Durham, NH 03824 USA

[2] Binghamton Univ, Dept Phys Appl Phys & Astron, Binghamton, NY 13902 USA

[3] Argonne Natl Lab, Xray Sci Div Adv Photon Source, Lemont, IL 60439 USA

[4] Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA

[5] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2021年 / 9卷 / 28期

基金：

美国国家科学基金会;

关键词：

HYDRATED VANADIUM-OXIDES; LONG CYCLE LIFE; AQUEOUS SODIUM; CONDUCTIVE POLYMER; LAYERED STRUCTURES; STRUCTURAL WATER; V2O5; LAYERS; XEROGEL; NANOCOMPOSITES; ELECTRODES;

D O I：

10.1039/d1ta02003j

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We reported that the incorporation of a conductive polymer into V2O5 materials resulted in an increased interlayer distance of 2.2 nm, favoring K+ ion storage in aqueous electrolyte. In situ X-ray diffraction showed that during charging, K+ ions were first inserted into the interlayer region of V2O5 through pseudocapacitive intercalation and then continued to be inserted into the [VO6] bi-layer region via diffusion-limited intercalation. This reversible dual-stage insertion/extraction mechanism provides new battery chemistry allowing the storage of around 50% more alkali ions in the intralayer region besides van der Waals gaps.

引用

页码：15629 / 15636

页数：9

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