Developing a three-dimensional co-continuous phase network structure via enhanced inter-component affinity for high-performance flexible organic radical electrodes

Abstract

Inspired by the results of molecular dynamic simulation, a novel binary poly (ethylene-alt-2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO) maleate) (PETM) and single-walled carbon nanotubes (SWNT) nanocomposite thin film is first prepared and used as...

Polynitrosoarene Radical as an Efficient Cathode Material for Lithium-Ion Batteries

“…Furthermore, a discharge capacity of 300 mAh g −1 is maintained after 100 cycles at a current density of 100 mA g −1 (Figure 2b), which is several times higher than those of typical TEMPO-based radical materials (Figure 2c). 12,17,52,53 Besides, it can be intuitively seen from the charge−discharge curves (Figure 2d) that even the current density is raised to 1000 mA g −1 , and it can still retain high capacity and stability in the wide voltage window of 1.3−4.3 V. The symmetrical charge−discharge curve also proves that TPA-3NO has outstanding coulomb efficiency (Figure S12). To understand the superior rate capacity of the TPA-3NO electrode, a series of CV curves at different scan rates of 0.2, 0.4, 0.6, 0.8, and 1 mV s −1 were recorded.…”

“…For example, 181 and 117 mA h g –1 capacities are achieved at 500 and 1000 mA g –1 , respectively, indicating its superior performance as a radical cathode material in LIBs. Furthermore, a discharge capacity of 300 mAh g –1 is maintained after 100 cycles at a current density of 100 mA g –1 (Figure b), which is several times higher than those of typical TEMPO-based radical materials (Figure c). ,,, Besides, it can be intuitively seen from the charge–discharge curves (Figure d) that even the current density is raised to 1000 mA g –1 , and it can still retain high capacity and stability in the wide voltage window of 1.3–4.3 V. The symmetrical charge–discharge curve also proves that TPA-3NO has outstanding coulomb efficiency (Figure S12).…”

“…(b) Cycling performance at 100 mA g –1 . (c) Comparison between the reported theoretical and practical capacities of organic radical cathode materials in LIBs: TEMPO radical-based cathodes (the exceeded capacities of practical values over their theoretical values are due to the additives); ,,, proxyl radical-based cathodes; − nitonylnitroxide radical-based cathodes; galvinoxyl radical-based cathodes; spiro-dinitroxide radical-based cathodes; Blatter radical-based cathodes; trioxotriangulene radical-based cathodes (the exceeded capacities of practical values over their theoretical values are due to the accommodation of electrons in the vicinity of the surface of the microcrystals) and sulfuranyl radical-based cathodes . (d) Charging/discharging curves at different current densities.…”

Low-cost p-benzoquinone-formaldehyde polymer/reduced graphene oxide composite films as a cathode material for rechargeable lithium-ion batteries

“…It should be noted that the capacity of the composite lms increases gradually in the initial several cycles at the current densities of 1000 mA g −1 and 2500 mA g −1 , which is attributed to the gradual activation of rGO during electrochemical cycling, especially at high current densities. [30][31][32] Compared with other electrode materials with the same electroactive unit (all with a theoretical specic capacity of 446 mA h g −1 ), 18,[21][22][23]33,34 carbonyl material/rGO composites, [35][36][37][38] carbonyl material/ carbon material composites, [39][40][41][42] and other carbonyl materials, [43][44][45][46][47][48][49][50][51][52] FQ/rGO in this work is among the best electrode materials in terms of cycling stability (Fig. S14 †).…”

Interfacial Tuning of Polymeric Composite Materials for High-Performance Energy Devices

“…In addition to activated carbon, one-dimensional carbon nanomaterials such as SWNT/MWNTs are also utilized to make polymer composites. An SWNT composite composed of a tetramethyl-1-piperidinyloxy (TEMPO)-based radical polymer possesses a three-dimensional network-like structure with higher structural stability and electrical conductivity [116]. The Poly-TEMPO/SWNT composite exhibits higher cyclic stability with >95% capacity retention (2000 GCD cycles) and rate capability (Table 2).…”