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高国新

性别：男

职称：教授

学历：博士研究生毕业

学位：博士

所在单位：化学学院

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办公地点：西安交通大学兴庆校区化学楼218房间，中国西部创新港校区19号楼

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学科： 材料科学与工程 、 化学

招生学科 化学 、 化学工程与技术 、 材料科学与工程

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中文主页 / 科学研究 / 论文成果

论文成果

Blowing Iron Chalcogenides into Two-Dimensional Flaky Hybrids with Superior Cyclability and Rate Capability for Potassium-Ion Batteries

发布时间：2025-11-22

影响因子：
15.881
DOI码：
10.1021/acsnano.0c06667
论文名称：
Blowing Iron Chalcogenides into Two-Dimensional Flaky Hybrids with Superior Cyclability and Rate Capability for Potassium-Ion Batteries
发表刊物：
ACS Nano
关键字：
iron chalcogenidefast ion transportintermediate phases"gel-blowing" strategypotassium-ion batteries
摘要：
Chalcogenide-based anodes are receiving increasing attention for rechargeable potassium-ion batteries (PIBs) due to their high theoretical capacities. However, they usually exhibit poor electrochemical performance due to poor structural stability, low conductivity, and severe electrolyte decomposition on the reactive surface. Herein, a method analogous to "blowing bubbles with gum" is used to confine FeS2 and FeSe2 in N-doped carbon for PIB anodes with ultrahigh cyclic stability and enhanced rate capability (over 5000 cycles at 2 A g(-1)). Several theoretical and experimental methods are employed to understand the electrodes' performance. The density functional theory calculations showed high affinity for potassium adsorption on the FeS2 and FeSe2. The in situ XRD and ex situ TEM analysis confirmed the formation of several intermediate phases of the general formula KxFeS2. These phases have high conductivity and large interlayer distance, which promote reversible potassium insertion and facilitate the charge transfer. Also, the calculated potassium diffusion coefficient during charge/discharge further proves the enhanced kinetics. Furthermore, The FeS2@NC anode in a full cell also exhibits high cyclic stability (88% capacity retention after 120 cycles with 99.9% Coulombic efficiency). Therefore, this work provides not only an approach to overcome several challenges in PIB anodes but also a comprehensive understanding of the mechanism and kinetics of the potassium interaction with chalcogenides.
合写作者：
Shiyao Lu,Siyuan Xu,Jing Zhao,Yuankun Wang
第一作者：
Hu Wu
论文类型：
期刊论文
通讯作者：
Kai Xi,Shujiang Ding,Guoxin Gao
论文编号：
WOS:000623061800040
学科门类：
工学
一级学科：
材料科学与工程
文献类型：
J
卷号：
15
期号：
2
页面范围：
2506-2519
ISSN号：
1936-0851
是否译文：
否
发表时间：
2021-01-19
收录刊物：
SCI、ESI、SCI、ESI
发布期刊链接：
https://pubs.acs.org/GetFtrContent/GetPdfByDoi?doi=10.1021%2Facsnano.0c06667&resourcetype=4&getftrtoken=AQECAHi208BE49Ooan9kkhW_Ercy7Dm3ZL_9Cf3qfKAc485ysgAAALcwgbQGCSqGSIb3DQEHBqCBpjCBowIBADCBnQYJKoZI

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