Defect-Induced Dense Amorphous/Crystalline Heterophase Enables High-Rate and Ultrastable Sodium Storage
作者:Osman, S (Osman, Sahar) [1] , [2] ; Peng, C (Peng, Chao) [3] ; Li, FK (Li, Fangkun) [1] , [2] ; Chen, HL (Chen, Haoliang) [1] , [2] ; Shen, JD (Shen, Jiadong) [1] , [2] ; Zhong, ZM (Zhong, Zeming) [1] , [2] ; Huang, WJ (Huang, Wenjie) [1] , [2] ; Xue, DF (Xue, Dongfeng) [3] ; Liu, J (Liu, Jun) [1] , [2]
(由 Clarivate 提供)
卷9
期36
DOI10.1002/advs.202205575
出版时间DEC 2022
在线发表OCT 2022
已索引2022-11-09
文献类型Article
摘要
Currently, the construction of amorphous/crystalline (A/C) heterophase has become an advanced strategy to modulate electronic and/or ionic behaviors and promote structural stability due to their concerted advantages. However, their different kinetics limit the synergistic effect. Further, their interaction functions and underlying mechanisms remain unclear. Here, a unique engineered defect-rich V2O3 heterophase structure (donated as A/C-V2O3-x@C-HMCS) composed of mesoporous oxygen-deficient amorphous (-) hollow core (A-V2O3-x/HMC) and lattice-distorted crystalline shell (C-V2O3/S) encapsulated by carbon is rationally designed via a facile approach. Comprehensive density functional theory (DFT) calculations disclose that the lattice distortion enlarges the porous channels for Na+ diffusion in the crystalline phase, thereby optimizing its kinetics to be compatible with the oxygen-vacancy-rich amorphous phase. This significantly reduces the high contrast of the kinetic properties between the crystalline and amorphous phases in A/C-V2O3-x@C-HMCS and induces the formation of highly dense A/C interfaces with a strong synergistic effect. As a result, the dense heterointerface effectively optimizes the Na+ adsorption energy and lowers the diffusion barrier, thus accelerating the overall kinetics of A/C-V2O3-x@C-HMCS. In contrast, the perfect heterophase (defects-free) A/C-V2O3@C-HCS demonstrates sparse A/C interfacial sites with limited synergistic effect and sluggish kinetics. As expected, the A/C-V2O3-x@C-HMCS achieves a high rate and ultrastable performance (192 mAh g(-1) over 6000 cycles at 10 A g(-1)) when employed for the first time as a cathode for sodium-ion batteries (SIBs). This work provides general guidance for realizing dense heterophase cathode design for high-performance SIBs and beyond.
关键词
作者关键词amorphouscrystalline heterophasedefect-richlattice distortionoxygen vacancysodium-ion batteriesvanadium trioxide
Keywords PlusCATHODE MATERIALSION BATTERIESV2O3CARBONNA3V2(PO4)(3)
作者信息
通讯作者地址
Liu, Jun
(通讯作者)
South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510641, Guangdong, Peoples R China
通讯作者地址
Liu, Jun
(通讯作者)
South China Univ Technol, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510641, Guangdong, Peoples R China
所属机构
South China University of Technology
通讯作者地址
Peng, Chao
(通讯作者)
Chinese Acad Sci, Shenzhen Inst Adv Technol, Multiscale Crystal Mat Res Ctr, Shenzhen 518055, Peoples R China
地址
1 South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510641, Guangdong, Peoples R China
2 South China Univ Technol, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510641, Guangdong, Peoples R China
3 Chinese Acad Sci, Shenzhen Inst Adv Technol, Multiscale Crystal Mat Res Ctr, Shenzhen 518055, Peoples R China
电子邮件地址chao.peng@siat.ac.cnmsjliu@scut.edu.cn
类别/分类
研究方向ChemistryScience & Technology - Other TopicsMaterials Science
引文主题
2 Chemistry
2.62 Electrochemistry
2.62.52 Supercapacitor
Sustainable Development Goals
11 Sustainable Cities and Communities
Web of Science 类别Chemistry, MultidisciplinaryNanoscience & NanotechnologyMaterials Science, Multidisciplinary