Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 561, Issue -, Pages 203-210Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2019.11.091
Keywords
Sodium ion batteries; Anode; Biomass; Hard carbon; Free-standing electrode
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Funding
- National Natural Science Foundation of China, China [51702063, 51672056]
- Natural Science Foundation of Heilongjiang, China [LC2018004]
- China Postdoctoral Science Foundation, China [2018M630340]
- Fundamental Research Funds for the Central University, China [HEUCFD201732]
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A three-dimensional free-standing hard carbon (FHC) electrode is synthesized by carbonizing the hemp haulm and employed as anode for sodium-ion batteries directly. A high current charging-discharging process is carried out to reconstruct surface structure of the FHC. Surface reconstructed FHC display a high capacity of 256 mAh/g and enhanced rate ability. With the formation of order surface structure, the plateau capacity increase and more sodium ions can insert into the FHC. This work demonstrates the importance of surface structure for sodium ion diffusion and storage and provide a new strategy to design high-performance anode materials. (C) 2019 Elsevier Inc. All rights reserved.
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