title: A Sulfur Heterocyclic Quinone Cathode and a Multifunctional Binder for a High-Performance Rechargeable Lithium-Ion Battery.
abstract: We report a rational design of a sulfur heterocyclic quinone (dibenzo[b,i]thianthrene-5,7,12,14-tetraone=DTT) used as a cathode (uptake of four lithium ions to form Li4 DTT) and a conductive polymer [poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)=
  
  
  
  PSS) used as a binder for a high-performance rechargeable lithium-ion battery. Because of the reduced energy level of the lowest unoccupied molecular orbital (LUMO) caused by the introduced S atoms, the initial Li-ion intercalation potential of DTT is 2.89 V, which is 0.3 V higher than that of its carbon analog. Meanwhile, there is a noncovalent interaction between DTT and
  
  
  
  PSS, which remarkably suppressed the dissolution and enhanced the conductivity of DTT, thus leading to the great improvement of the electrochemical performance. The DTT cathode with the
  
  
  
  PSS binder displays a long-term cycling stability (292 mAh g(-1) for the first cycle, 266 mAh g(-1) after 200 cycles at 0.1 C) and a high rate capability (220 mAh g(-1) at 1 C). This design strategy based on a noncovalent interaction is very effective for the application of small organic molecules as the cathode of rechargeable lithium-ion batteries.
authors.affiliation: Key Laboratory of Advanced Energy Materials Chemistry and State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China.
authors.forename: Ting
authors.initials: T
authors.lastname: Ma
authors.affiliation: Key Laboratory of Advanced Energy Materials Chemistry and State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China.
authors.forename: Qing
authors.initials: Q
authors.lastname: Zhao
authors.affiliation: Key Laboratory of Advanced Energy Materials Chemistry and State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China.
authors.forename: Jianbin
authors.initials: J
authors.lastname: Wang
authors.affiliation: Key Laboratory of Advanced Energy Materials Chemistry and State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China.
authors.forename: Zeng
authors.initials: Z
authors.lastname: Pan
authors.affiliation: Key Laboratory of Advanced Energy Materials Chemistry and State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China. chenabc@nankai.edu.cn.
authors.forename: Jun
authors.initials: J
authors.lastname: Chen
keywords: lithium-ion batteries; molecular design; multifunctional binders; noncovalent interactions; sulfur heterocyclic quinones