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论文类型：期刊论文

发表时间：2019-01-01

发表刊物：ACS APPLIED ENERGY MATERIALS

收录刊物：SCIE

卷号：2

期号：1

页面范围：729-735

ISSN号：2574-0962

关键字：subbituminous coal; hard carbon; anode; pyrolyzed carbon; sodium storage mechanism; sodium-ion battery

摘要：A pyrolyzed subbituminous carbon is synthesized through a simple one-step carbonization process as lowcost and high-capacity anode for sodium-ion batteries (SIB). The pyrolyzed subbituminous carbon, SHC-1300 anode shows high Na storage capacity of 291 mA h g(-1) at 20 mA g(-1) and high initial Coulombic efficiency of 79.5%, as well as stable cycling performance, exhibiting a promising alternative anode for affordable and high-performance SIB. Furthermore, according to the investigation of the electrochemical performance and structural characterizations, the SHC-1300 pyrolyzed from subbituminous coal with flexible structure demonstrates a better electrochemical performance compared with the BHC-1300 pyrolyzed from bituminous coal with rigid structure. The sodium storage mechanism and structural evolution reported in this work may give a new prospect for the selection of pyrolyzed carbon materials for high-performance sodium-ion batteries.