Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 31, Issue 51, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.202107830
Keywords
dual-ion full batteries; fast kinetics; high energy; power densities; optimized cathodes; promoted anions storage
Categories
Funding
- National Natural Science Foundation of China [52025013, 52071184, 5217010107, 21835004]
- Ministry of Science and Technology of China [2017YFA0206702, 2016YFB0901502]
- 111 Project [B12015]
- Natural Science Foundation of Tianjin [18ZXJMTG00040, 19JCZDJC31800]
- Fundamental Research Funds for the Central Universities
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Developing a new type of cathode material, this study achieved efficient and stable storage of ClO4-, improving the performance of dual-ion batteries. The results indicate that the new P-PANI cathode has a high reversible capacity and demonstrates high energy density performance when paired with a hard carbon anode.
The most used systems based on the graphite-based cathode show unsatisfactory performance in dual-ion batteries. Developing new type cathode materials with high capacity for new type anions storage is an effective way to improve the total performance of dual-ion batteries. Herein, a protonated polyaniline (P-PANI) cathode is prepared to realize efficient and stable storage of ClO4-, and a high reversible capacity of 143 mAh g(-1) at 0.2 A g(-1) after 200 cycles can be obtained, which is competitive compared with common graphite cathodes. In addition, the highly reversible coordination storage mechanism between ClO4- and P-PANI cathode is indicated, rather than the labored intercalation reactions between PF6- and graphite. Subsequently, a full cell (P-PANI//N-PDHC) fabricated with a P-PANI cathode and hard carbon anode (N-PDHC) can deliver a high energy density of 284 Wh kg(-1) for 2000 cycles at 2 A g(-1), and the relevant pouch-type full cell can easily power a smartphone. In general, this work may promote the exploitation of sodium-based dual-ion batteries in practical application.
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