journal article·2020-12-28

Carbon-Coated Self-Assembled Ultrathin T-Nb2O5 Nanosheets for High-Rate Lithium-Ion Storage with Superior Cycling Stability

Yang Li, Yan Wang, Guirong Cui, Tianyu Zhu, Jianfang Zhang, Cuiping Yu, Jiewu Cui, Jingjie Wu, Hark Hoe Tan, Yong Zhang, Yucheng Wu

ACS Applied Energy Materials· Volume 3· Issue 12
Publisher page

Abstract

Niobium pentoxide (Nb2O5) with the advantages of high working potential and negligible volume expansion has been an attractive canditate for lithium-ion battery (LIB) applications. Unfortunately, the intrinsic shortcoming of sluggish electron transportation hinders its widespread application as an effective anode material. Here, we present the successful construction of carbon-coated self-assembled three-dimensional (3D) ultrathin T-Nb2O5 nanosheets (T-Nb2O5@C). The carbon layer and ultrathin nanosheets endow Nb2O5 with high electronic conductivity, prominent structural stability, and short ion-diffusion path, thus significantly improving lithium-ion transportation and storage properties. Consequently, when adopted as a LIB anode, the T-Nb2O5@C nanocomposite demonstrates excellent discharge capacity (231.9 mA h g–1 at 0.1 A g–1) and rate performance (62.0% capacity retention with the current density increasing from 0.1 to 5.0 A g–1). T-Nb2O5@C can also deliver superior cycling stabilities of 97.8 and 94.6% after 200 cycles at 0.2 A g–1 and 1000 cycles at 2 A g–1, respectively. Therefore, the T-Nb2O5@C exhibits great prospects for ultrafast and durable LIBs.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Advancements in Battery Materials · Supercapacitor Materials and Fabrication · Semiconductor materials and devices

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China

Department of Chemical and Environmental Engineering, University of Cincinnati, Cincinnati, Ohio 45221, United States

China International S&T Cooperation Base for Advanced Energy and Environmental Materials & Anhui Provincial International S&T Cooperation Base for Advanced Energy Materials, Hefei University of Technology, Hefei 230009, China

Department of Electronic Materials Engineering, Research School of Physics, The Australian National University, Canberra, Australian Capital Territory 2601, Australia

Key Laboratory of Advanced Functional Materials and Devices of Anhui Province, Hefei University of Technology, Hefei 230009, China

Funding

State Administration of Foreign Experts Affairs · Ministry of Education of the People's Republic of China · China Postdoctoral Science Foundation · National Natural Science Foundation of China

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