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首页> 外文期刊>Advanced functional materials >Organic-Carbon Core–Shell Structure Promotes Cathode Performance for Na-Ion Batteries
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Organic-Carbon Core–Shell Structure Promotes Cathode Performance for Na-Ion Batteries

机译：Organic-Carbon Core–Shell Structure Promotes Cathode Performance for Na-Ion Batteries

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摘要

The organic-carbon core-shell structure is constructed for the cathode materialof [N,N’-bis(2-anthraquinone)]-perylene-3,4,9,10-tetracarboxydiimide(PTCDI-DAQ, 200 mAh g~（?1）) through an interesting strategy called the surfaceself-carbonization. As expected, the organic-carbon core–shell structure(PTCDI-DAQ@C) can endow PTCDI-DAQ the outstanding cathode performancein Na-ion batteries. In half cells using 1 m NaPF6/DME, PTCDIDAQ@C can maintain 173 mAh g?1 for nearly one year, while PTCDI-DAQquickly decreases from 203 to 121 mAh g~（?1） only after 100 cycles. Meanwhile,the constructed Na-ion full cells with the Na-intercalated hard carbon anodecan deliver the peak discharge capacity of 195 mAh g~（?1）cathode and the highmedian voltage of 1.7 V in 0.9–3.2 V, corresponding to the peak energy densitiesof 332 Wh kg?1cathode and 184 Wh kg~（?1）total mass, respectively. Notably, theelectrode materials only include the very cheap elements of C, H, O, N, andNa. Furthermore, the Na-ion full cells can also show the very impressive hightemperature(197 mAh g~（?1）cathode at 50 ℃) and subzero (185/90 mAh g~（?1）cathodeat ?10/?40 ℃) performances, respectively. To the best of the authors’knowledge, the comprehensive properties of the Na-ion full cells are the bestresults based on organic cathodes.

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