DataVXBatteries & SupercapsPaper
journal article·2019-11Open access

Enhancing the Rate Capability of Niobium Oxide Electrode through Rare‐Earth Doping Engineering

Dandan Yin, Hongyang Zhao, Na Li, Rui Si, Xiaolei Sun, Xinghua Li, Yaping Du

Batteries & Supercaps· Volume 2· Issue 11
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Source abstract

Abstract

Abstract Niobium oxide is considered one of the most promising electrode materials for ultrafast electrochemical energy storage devices with high energy density. In this work, we first found that trace amounts (<1 %) of Yb3+ doping remarkably enhanced the rate capability of T−Nb2O5, which was further proved to be because of the formation of a thin layer of amorphous YbNbOx. The capacity of YbNbOx‐coated Nb2O5 reached 124 mAh g−1 at 20 C, which is the highest value reported among pristine Nb2O5 electrodes. Besides, we found that doping with other rare‐earth elements such as Nd3+, Sm3+, and Gd3+ can also improve the rate capability of T−Nb2O5. It can be concluded that rare‐earth doping can be an effective and robust method to enhance the intrinsic rate performance of electrode materials without complicated modifications.
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Research context

OpenAlex topics: Advancements in Battery Materials · Supercapacitor Materials and Fabrication · Advanced Battery Materials and Technologies

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

Affiliations

School of Materials Science and Engineering & National Institute for Advanced Materials Tianjin Key Lab for Rare Earth Materials and Application Centre for Rare Earth and Inorganic Functional Materials Nankai University Tianjin 300350 P.R. China

School of science, Xi'an Jiaotong University Xi'an Shaanxi 710054 P.R. China

Frontier Institute of Science and Technology Xi'an Jiaotong University Xi'an, Shaanxi 710054 P.R. China

Shanghai Synchrotron Radiation Facility Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai 201204 P.R. China

School of Physics Northwest University Xi'an, Shaanxi 710127 P.R. China

Funding

National Natural Science Foundation of China · Brookhaven National Laboratory

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