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Insight into the Origin of Capacity Fluctuation of Na2Ti6O13 Anode in Sodium Ion Batteries
Wu, Chunjin1; Wu, Zhen-Guo1; Zhang, Xiaobing2; Rajagopalan, Ranjusha3; Zhong, Benhe1; Xiang, Wei4; Chen, Mingzhe3; Li, Hongtai5; Chen, Tingru1; Wang, Enhui1,3; Yang, Zuguang1; Guo, Xiaodong1

The capacity fluctuation phenomenon during cycling, which is closely related with solid electrolyte interphase and plays a key role for the design for advanced electrode, could be frequently observed in the titanium-based anode. However, the underlying reason for capacity fluctuation still remains unclear with rare related reports. Here, the origin of capacity fluctuation is verified with a long-life Na2Ti6O13 anode. The reaction mechanism, structural evolution and reaction kinetics during the reported sodiation/desodiation processes were carefully investigated. The gradually enhanced diffusion controlled contribution resulted in the capacity increasing. And the capacity decay could be ascribed to the irreversible reaction of metallic titanium formation and the increasing potential polarization. It is worth noting that sodium ions seem to partially reduce NTO to metallic state, which is irreversible. The present study can provide more information for the design of advanced Na2Ti6O13 anode.

KeywordSodium Ion Battery Titanium-based Anode Capacity Fluctuation Pseudocapacitance Metallic Titanium
WOS HeadingsScience & Technology ; Technology
Indexed BySCI
WOS KeywordSolid-electrolyte Interphase ; Lithium Insertion ; Titanium-oxide ; Hard Carbon ; Performance ; Na ; Storage ; Nanorods ; Spinel ; Titanate
WOS Research AreaScience & Technology - Other Topics ; Materials Science
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary
Funding OrganizationNational Natural Science Foundation of China(21373008) ; National Key Research and Development of China(2016YFB0100202) ; China Postdoctoral Science Foundation(2014M562322) ; AutoCRC Project(1-111)
WOS IDWOS:000418783700021
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Document Type期刊论文
Corresponding AuthorWu, Zhen-Guo; Guo, Xiaodong
Affiliation1.Sichuan Univ, Sch Chem Engn, Chengdu 610065, Sichuan, Peoples R China
2.Petrochina Southwest Oil & Gasfield Co, Chongqing Nat Gas Purificat Plant, Chongqing 401220, Peoples R China
3.Univ Wollongong, Inst Superconducting & Elect Mat, Wollongong, NSW 2522, Australia
4.Chengdu Univ Technol, Coll Mat & Chem & Chem Engn, Chengdu 610059, Sichuan, Peoples R China
5.Chinese Acad Sci, Inst Proc Engn, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Wu, Chunjin,Wu, Zhen-Guo,Zhang, Xiaobing,et al. Insight into the Origin of Capacity Fluctuation of Na2Ti6O13 Anode in Sodium Ion Batteries[J]. ACS APPLIED MATERIALS & INTERFACES,2017,9(50):43596-43602.
APA Wu, Chunjin.,Wu, Zhen-Guo.,Zhang, Xiaobing.,Rajagopalan, Ranjusha.,Zhong, Benhe.,...&Guo, Xiaodong.(2017).Insight into the Origin of Capacity Fluctuation of Na2Ti6O13 Anode in Sodium Ion Batteries.ACS APPLIED MATERIALS & INTERFACES,9(50),43596-43602.
MLA Wu, Chunjin,et al."Insight into the Origin of Capacity Fluctuation of Na2Ti6O13 Anode in Sodium Ion Batteries".ACS APPLIED MATERIALS & INTERFACES 9.50(2017):43596-43602.
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