Tuning the Closed Pore Structure of Hard Carbons with the Highest Na Storage Capacity

Meng, Qingshi; Lu, Yaxiang; Ding, Feixiang; Zhang, Qiangqiang; Chen, Liquan; Hu, Yong‐Sheng

doi:10.1021/acsenergylett.9b01900

articleACS Energy LettersOct 4, 2019Closed access

Tuning the Closed Pore Structure of Hard Carbons with the Highest Na Storage Capacity

QMQingshi Meng YLYaxiang Lu FDFeixiang Ding QZQiangqiang Zhang LCLiquan Chen

Chinese Academy of Sciences · Institute of Physics · +1 more institution

Indexed incrossref

Abstract

High-capacity anode materials are one of the bottlenecks to further improve the energy density of Na-ion batteries (NIBs). Except for introducing more defects to increase the sloping capacity, tuning the closed porous structure to boost the plateau capacity is another direction. Here by adopting phenol-formaldehyde resin (PF) as the carbon precursor and ethanol (EtOH) as the pore-forming agent, through precise chemical regulation of their relative content during a solvothermal process before further carbonization, carbon anodes with appropriate microstructure are achieved. It is found that the function of EtOH rests on generating steam vapor to create a pore cavity among cross-linked matrixes. The obtained…

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Topics & keywords

Topics

Keywords

Anode
Faraday efficiency
Carbonization
Chemical engineering
Energy storage
Cathode
Porosity
Microstructure

UN Sustainable Development Goals

Affordable and clean energy

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