journal article·2021-09-27

Boosting High-Rate Sodium Storage of CuS via a Hollow Spherical Nanostructure and Surface Pseudocapacitive Behavior

Yue Hu, Lifeng Zhang, Jiaxi Bai, Fenghua Liu, Zan Wang, Weiping Wu, Robert Bradley, Li Li, Huan Ruan, Shouwu Guo

ACS Applied Energy Materials· Volume 4· Issue 9
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Abstract

The fast capacity decay of existing anode materials at a high rate is a thorny problem that hinders the thriving development of sodium ion batteries (SIBs). Herein, we present a unique anode material constructed via cuprous sulfide hollow nanospheres (CuS HNs), which can achieve ultrafast sodiation-desodiation at high rate (20 A g–1) and stable cycling 2000 times without obvious capacity degradation (250.1 mAh g–1, capacity retention of 93%). As far as we know, this excellent rate performance is superior to most of the other currently known metal oxides/sulfides anode materials for SIBs. It is believed that the contribution for high-rate sodium storage of CuS HNs mainly comes from the synergistic effect between hollow nanosphere structure and surface pseudocapacitive behavior. The open hollow nanostructure allows the pseudocapacitive storage simultaneously on the inner and outer surfaces of the nanospheres. Meanwhile, the pseudocapacitive behavior can relieve the large stress of nanospheres at high rate and retain the structural stability of electrode materials. The feature of ultralfast charging and discharging of CuS HNs without obvious capacity sacrifice would be expected to provide a strong boost for the large-scale application of SIBs.
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Research context

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

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

Affiliations

School of Materials Science and Engineering, Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science and Technology, Xi’an 710021, China

State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China

Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China

Laboratory of Thin Film Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China

MatSurf Technology Ltd., The Old Stables Marion Lodge, Little Salkeld, Penrith, Cumbria CA10 1NW, United Kingdom

Department of Materials, University of Oxford, 16 Parks Road, Oxford OX1 3PH, United Kingdom

School of Energy Resources, University of Wyoming, Laramie, Wyoming 82071, United States

Shaanxi Yuneng Group Energy Chemical Research Institute Co. LTD, Yulin 719000, China

School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

Funding

Shaanxi University of Science and Technology · Innovate UK · Science and Technology Commission of Shanghai Municipality · National Natural Science Foundation of China · Natural Science Foundation of Shaanxi Province · Chinese Academy of Sciences

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