中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 金属研究所
  3. 中国科学院金属研究所
Understanding charge storage in Nb2CTx MXene as an anode material for lithium ion batteries

文献类型：期刊论文

作者Cheng, Renfei2,3; Hu, Tao4; Wang, Zuohua5; Yang, Jinxing2,3; Dai, Ruqiao2,3; Wang, Weizhen2; Cui, Cong2,3; Liang, Yan2; Zhang, Chao2; Li, Cuiyu6
刊名PHYSICAL CHEMISTRY CHEMICAL PHYSICS
出版日期2021-09-16
页码11
ISSN号1463-9076
DOI10.1039/d1cp03070a
通讯作者Wang, Xiaohui(wang@imr.ac.cn)
英文摘要MXenes represent an emerging family of two-dimensional materials of transition metal carbides/carbonitrides terminated with functional groups like -O, -OH, and -F on the chemically active surface of MX slabs. As a member of the family, Nb2CTx exhibits superior lithium storage capacity over most of the other MXenes as anode materials in lithium-ion batteries (LIBs). However, an in-depth understanding of the charge storage mechanism is still lacking so far. Here, through combining complementary experiments and density functional theory calculations, we provide insights into the (de)lithiation process. Specifically, Nb2CTx with dominant -O functional groups stores charge as a result of changes in the oxidation states of both transition metals Nb and O, which is supported by Bader charge analysis showing a significant change in the oxidation states of Nb and O upon lithiation. As monitored by ex situ X-ray diffraction, the interlayer spacing of Nb2CTx changes slightly upon lithium ion (de)intercalation, corresponding to a volume change of only 2.3% with a near zero-strain feature. By coupling with a LiFePO4/C cathode, the full cell presents superior rate capability and cycling stability as well. The insights into the charge storage mechanism of Nb2CTx in this work provide useful guidance for the rational design of MXene-based anode materials for high-performance LIBs.
资助项目National Natural Science Foundation of China[51972310] ; Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences
WOS研究方向Chemistry ; Physics
语种英语
WOS记录号WOS:000704423900001
出版者ROYAL SOC CHEMISTRY
资助机构National Natural Science Foundation of China ; Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences
源URL[http://ir.imr.ac.cn/handle/321006/166678]  
专题金属研究所_中国科学院金属研究所
通讯作者Wang, Xiaohui
作者单位1.Zhengzhou Univ, Sch Mat Sci & Engn, Zhengzhou 450001, Peoples R China
2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
3.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
4.Suzhou Univ Sci & Technol, Inst Mat Sci & Devices, Suzhou 215009, Peoples R China
5.Yanshan Univ, Coll Mech Engn, Natl Engn Res Ctr Equipment & Technol Cold Strip, Qinhuangdao 066004, Hebei, Peoples R China
6.Suma Technol Co Ltd, Adv Comp East China Subctr, Kunshan 215300, Peoples R China
推荐引用方式
GB/T 7714		 Cheng, Renfei,Hu, Tao,Wang, Zuohua,et al. Understanding charge storage in Nb2CTx MXene as an anode material for lithium ion batteries[J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS,2021:11.
APA Cheng, Renfei.,Hu, Tao.,Wang, Zuohua.,Yang, Jinxing.,Dai, Ruqiao.,...&Wang, Xiaohui.(2021).Understanding charge storage in Nb2CTx MXene as an anode material for lithium ion batteries.PHYSICAL CHEMISTRY CHEMICAL PHYSICS,11.
MLA Cheng, Renfei,et al."Understanding charge storage in Nb2CTx MXene as an anode material for lithium ion batteries".PHYSICAL CHEMISTRY CHEMICAL PHYSICS (2021):11.

入库方式： OAI收割

来源：金属研究所

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。