Pivotal role of Ti-O bond lengths on crystalline structure transition of sodium titanates during electrochemical deoxidation in CaCl2-NaCl melt
Peng, Yan1,2,3; Wang, Dong1,2; Wang, Zhi1,2; Gong, Xuzhong1,2; Wang, Mingyong1,2; Qi, Tao1,2; Meng, Fancheng1,2
2018-03-25
发表期刊JOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
卷号738页码:345-353
摘要The crystalline structures transition of TiO2, Na8Ti5O14, Na2TiO3 and Na2Ti3O7 during electrochemical deoxidation in CaCl2-NaCl melt were investigated via cyclic voltammetry (CV), constant voltage electrolysis, theoretical analysis and calculation. Both of the reduction potential of Na8Ti5O14, TiO2, Na2TiO3 and Na2Ti3O7 shown in cyclic voltammogram and the valence of titanium (Ti) of main electrolytic products shown in parallel constant voltage electrolysis (3.1 V) indicate that the electro-deoxidation sequences orderly are Na8Ti5O14, TiO2, Na2TiO3 and Na2Ti3O7 from easy to difficult. In addition, the corresponding Raman spectrums show that the Ti-O bond lengths are expected to decrease as follows: Na8Ti5O14> TiO2> Na2TiO3 > Na2Ti3O7. The average Ti-O bond lengths of Na8Ti5O14, TiO2, Na2TiO3 and Na2Ti3O7 shown in crystal structural are 1.95, 1.92, 1.70 and 1.67 A, respectively. The Ti-O lengths information explain above electro-deoxidation sequences. Furthermore, the dissociation energies of Na8Ti5O14 and TiO2 are 6.824 and 8.638 eV, respectively, which indicates that Na8Ti5O14 is easier to be reduced than TiO2. The theoretical analysis and calculation based on TieO bond lengths are consistent with experiment findings, which reveals that pivotal role of Ti-O bond lengths on crystalline structure transition during electrochemical deoxidation in CaCl2-NaCl melt. (C) 2017 Elsevier B.V. All rights reserved.
关键词Crystalline Structure Transition Electrochemical Deoxidation Ti-o Bond Lengths Cyclic Voltammetry Parallel Constant Voltage Electrolysis
文章类型Article
WOS标题词Science & Technology ; Physical Sciences ; Technology
DOI10.1016/j.jallcom.2017.12.148
收录类别SCI
语种英语
关键词[WOS]MOLTEN CALCIUM-CHLORIDE ; LITHIUM-ION BATTERIES ; TITANIUM-DIOXIDE ; SALT SYNTHESIS ; SOLID TIO2 ; RAMAN ; TEMPERATURE ; XPS ; REDUCTION ; POWDERS
WOS研究方向Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
项目资助者National Natural Science Foundation of China(51604255 ; 51422405)
WOS记录号WOS:000419214800044
引用统计
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/24091
专题湿法冶金清洁生产技术国家工程实验室
作者单位1.Chinese Acad Sci, Natl Engn Lab Hydromet Cleaner Prod Technol, Inst Proc Engn, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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Peng, Yan,Wang, Dong,Wang, Zhi,et al. Pivotal role of Ti-O bond lengths on crystalline structure transition of sodium titanates during electrochemical deoxidation in CaCl2-NaCl melt[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2018,738:345-353.
APA Peng, Yan.,Wang, Dong.,Wang, Zhi.,Gong, Xuzhong.,Wang, Mingyong.,...&Meng, Fancheng.(2018).Pivotal role of Ti-O bond lengths on crystalline structure transition of sodium titanates during electrochemical deoxidation in CaCl2-NaCl melt.JOURNAL OF ALLOYS AND COMPOUNDS,738,345-353.
MLA Peng, Yan,et al."Pivotal role of Ti-O bond lengths on crystalline structure transition of sodium titanates during electrochemical deoxidation in CaCl2-NaCl melt".JOURNAL OF ALLOYS AND COMPOUNDS 738(2018):345-353.
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