Construction of a Poly(anthraquinone Sulfide)/Carbon Nanotube Composite with Enhanced Li‐ion Storage Capacity

Abstract

Quinone compounds are among the most promising candidate organic materials for energy storage due to advantages such as their higher theoretical energy density. In the present paper, a one-step condensation method is described for connecting anthraquinone units via thioether bonds to generate a poly (anthraquinone sulfide) (PAQS) material as a promising lithium energy-storage system. Poly(anthraquinone sulfide)/carbon nanotube (PAQS/CNT) frameworks are then prepared via an insitu chemical solution method. The good electrochemical performance of the PAQS/CNT composite with 2 wt % carbon nanotubes is then demonstrated, with a significantly higher discharge specific capacity (187.2 mA h g À 1 ) than that of a pure PAQS electrode (101.0 mA h g À 1 ). Moreover, the specific capacity remains at 168.4 mA h g À 1 after 200 cycles, with a retention rate of 90.0 %. It is confirmed that CNTs play a number of roles in the composite polymer material, such as stabilizing the material structure during battery charging and discharging, improving the electronic conductivity, and alleviating the dissolution of the components of the organic electrolyte.

A novel conjugated porous polymer based on triazine and imide as cathodes for sodium storage

“…The small potential differences of the three pairs of redox peaks indicated the small polarization and a kinetically efficient and reversible reaction. 35 The current signal in the first discharge was slightly larger than that in the subsequent cycles, which could be ascribed to the formation of solid electrolyte interface (SEI) at low voltages during the first discharge. 8 The integral area of every oxidation peaks were roughly similar and suggested a one electron-transfer for every peak (Figure S7).…”

Electrochemical Preparation of Poly(N‐anthraquinoyl pyrrole) as High‐Performance Cathode Materials for Organic Lithium‐Ion Batteries

“…[ 24 ] Thus, many efforts were devoted to further design novel anthraquinone‐based cathode materials by increasing π – π stacking, [ 20 ] oligomerization, [ 24 ] hybridization with insoluble materials, [ 25 ] salification, [ 26,27 ] and polymerization. [ 28–31 ] Among these strategies, the polymerization procedure demonstrated a promising application prospect. For example, the anthraquinone dimer and trimer can bring a specific capacity of ≈240 mAh g −1 and much better cycle stability than anthraquinone.…”

Highly active quinone site-enriched carbon nanotube composites for efficient electrocatalytic hydrogen peroxide generation

“…S2a, ESI †), two obvious peaks can be observed, which are attributed to CQO (531.1 eV) and O-H/O-C (532.3 eV), respectively. 18 In addition, as shown in Fig. S2b (ESI †), the S 2p spectra can be fitted to two peaks located at 163.3 and 164.5 eV, which are derived from the S 2p 3/2 and S 2p 1/2 of Ar-S-Ar bonds.…”