期刊
JOURNAL OF POWER SOURCES
卷 343, 期 -, 页码 424-430出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2017.01.079
关键词
Na(2)PDHBQS/RGO; Ether-based electrolyte; Full cell; Sodium ion batteries
资金
- National Nature Science Foundation of China [21471091]
- Academy of Sciences large apparatus United Fund [11179043]
- Fundamental Research Funds of Shandong University [2015JC007]
- Taishan Scholar Project of Shandong Province [ts201511004]
Redox-active organic polymers are promising cathode electrodes owing to the advantages of open and flexible frame-works, renewability and environmental friendliness. Sodium salt of poly (2, 5-dihydroxyp-benzoquinonyl sulfide)/RGO (Na(2)PDHBQS/RGO) composite has been fabricated via a convenient route and applied as a high performance and stable cathode for sodium ion batteries. The Na2PDHBQS/RGO was investigated in ether-based electrolyte, which demonstrated better electrochemical performances (228, 214, 203, 193, 172 and 147 mAh g(-1) at 0.1, 0.2, 0.4, 0.8, 2 and 4C, respectively) than that in traditional ester-based ones. The high specific capacity, excellent cycle stability and reversibility of Na2PDHBQS/RGO may be attributed to the special porous structure, enhanced electronic conductivity by the introduction of RGO and fast sodium ion and electron diffusion rate in ether-based electrolyte. In addition, the Na2PDHBQS/RGO cathode has been assembled with disodium terephthalate (Na2TP) anode to compose a full cell for the first time, which presents an initial reversible capacity of 210 mAh g-1 at 0.1C. (C) 2017 Elsevier B.V. All rights reserved.
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