Zuschrift

A Hollow Multi‐Shelled Structure for Charge Transport and Active Sites in Lithium‐Ion Capacitors

Ruyi Bi

School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, No. 30, Xueyuan Road, Haidian District, Beijing, 100083 P. R. China

State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, 1 North 2nd Street, Zhongguancun, Haidian District, Beijing, 100190 P. R. China

These authors contributed equally to this work.

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Dr. Nan Xu

State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, 1 North 2nd Street, Zhongguancun, Haidian District, Beijing, 100190 P. R. China

These authors contributed equally to this work.

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Hao Ren

School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, No. 30, Xueyuan Road, Haidian District, Beijing, 100083 P. R. China

These authors contributed equally to this work.

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Prof. Nailiang Yang

State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, 1 North 2nd Street, Zhongguancun, Haidian District, Beijing, 100190 P. R. China

University of Chinese Academy of Sciences, Beijing, 100049 P. R. China

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Dr. Yonggang Sun

CAS Key Laboratory of Molecular Nanostructure and Nanotechnology and CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 P. R. China

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Prof. Anmin Cao

Corresponding Author

E-mail address: [email protected]

CAS Key Laboratory of Molecular Nanostructure and Nanotechnology and CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 P. R. China

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Prof. Ranbo Yu

Corresponding Author

E-mail address: [email protected]

School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, No. 30, Xueyuan Road, Haidian District, Beijing, 100083 P. R. China

Laboratory of Material Processing and Mold, Ministry of Education, Zhengzhou University, Zhengzhou, 450001 P. R. China

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Prof. Dan Wang

Corresponding Author

E-mail address: [email protected]

State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, 1 North 2nd Street, Zhongguancun, Haidian District, Beijing, 100190 P. R. China

University of Chinese Academy of Sciences, Beijing, 100049 P. R. China

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First published: 16 January 2020

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Abstract

Die richtige Balance aus aktiven Zentren und Ladungstransport wurde in einem Nb2O5‐Material mit hohler mehrlagiger Struktur hergestellt. Das Material zeigt eine ausgezeichnete Energiedichte, ultrahohe Leistungsdichte und gute Zyklenstabilität in hochleistungsfähigen Li‐Ionen‐Kondensatoren (LICs).

Abstract

The lithium‐ion capacitor (LIC) has attracted tremendous research interest because it meets both the requirement on high energy and power densities. The balance between effective surface areas and mass transport is highly desired to fabricate the optimized electrode material for LIC. Now, triple‐shelled (3S) Nb2O5 hollow multi‐shelled structures (HoMSs) were synthesized for the first time through the sequential templating approach and then applied for the anode of LIC. The unique structure of HoMSs, such as large efficient surface area, hierarchical pores, and multiple shells, provides abundant reaction sites, decreases the electron transport resistance, and increases the diffusion rate for ion transport. In this case, the best combination performance has been achieved among all the reported Nb2O5‐based materials, which delivered an excellent energy and power densities simultaneously, and superb cycling stability.

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