All Organic Sodium-Ion Batteries with Na4C8H2O6

被引:378
作者
Wang, Shiwen [1 ]
Wang, Lijiang [1 ]
Zhu, Zhiqiang [1 ]
Hu, Zhe [1 ]
Zhao, Qing [1 ]
Chen, Jun [1 ]
机构
[1] Nankai Univ, Coll Chem, Collaborat Innovat Ctr Chem Sci & Engn, Key Lab Adv Energy Mat Chem,Minist Educ, Tianjin 300071, Peoples R China
关键词
batteries; electrochemistry; electrode materials; rocking-chair cell; sodium; ELECTRODE MATERIALS; ANODE MATERIAL; CATHODE; INSERTION; TEREPHTHALATE; PERFORMANCE; CHARGE; OXIDE;
D O I
10.1002/anie.201400032
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Developing organic compounds with multifunctional groups to be used as electrode materials for rechargeable sodium-ion batteries is very important. The organic tetrasodium salt of 2,5-dihydroxyterephthalic acid (Na(4)DHTPA; Na4C8H2O6), which was prepared through a green one-pot method, was investigated at potential windows of 1.6-2.8 V as the positive electrode or 0.1-1.8 Vas the negative electrode (vs. Na+/Na), each delivering compatible and stable capacities of ca. 180 mAhg(-1) with excellent cycling. A combination of electrochemical, spectroscopic and computational studies revealed that reversible uptake/removal of two Na+ ions is associated with the enolate groups at 1.6-2.8 V (Na2C8H2O6/Na4C8H2O6) and the carboxylate groups at 0.1-1.8 V (Na4C8H2O6/Na6C8H2O6). The use of Na4C8H2O6 as the initial active materials for both electrodes provided the first example of all-organic rocking-chair SIBs with an average operation voltage of 1.8 V and a practical energy density of about 65 Whkg(-1).
引用
收藏
页码:5892 / 5896
页数:5
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