Structure regulation induced high capacity and ultra-stable cycling of conjugated organic cathodes for Li-ion batteries

Abstract

Polymerization strategy to integrate conjugated structures with rich redox-active units for lithium ion batteries has been rapidly adopted to realize highly efficient polymer cathodes, because polymerization can solve the poor...

Atomistic structural engineering of conjugated organic polymer cathodes for high-performance Li-organic batteries

“…The corresponding b values of peaks 1, 2, 3, and 4 are 1.019, 1.010, 0.897, and 0.877, respectively, closer to 1, demonstrating the predominant pseudocapacitive-controlled process of the kinetics in the PTO-Py electrode. 31,50 Similar results could be observed for PTO-Bz (Fig. S15b †), PTO-Pm (Fig.…”

“…30 Very recently, Yao and co-workers also constructed three novel PTO-based polymers, P(PTO-T1), P(PTO-T2) and P(PTO-TT), with different thiophene derivatives as conductive linking units, which indicated that P(PTO-TT) delivered the best rate performance (129 mA h g −1 at 2 A g −1 ) and cycling stability (94% capacity retention aer 1200 cycles at 2 A g −1 ). 31 These results conrmed that the introduction of conductive linking units between adjacent PTOs could improve electrochemical performance, which could be due to the enhanced conjugation and planarity. In comparison with linear polymers, extending the p-conjugated skeletons could effectively improve the electroconductivity of organic electrodes.…”

Aggregation behaviour of pyrene-based luminescent materials, from molecular design and optical properties to application

“…51). 265 On the other hand, the carbonyl groups can be further modified for organic battery applications. Seferos et al synthesized a novel pyrene-fused azaacene polymer 147 as an anode material for a lithium-ion battery, which shows an increased capacity of up to 1775 mA h g À1 (1535 mA h g À1 , subtracting the carbon additive contribution) with the number of cycles, ascribe to super-lithiation (Fig.…”

Design and Synthesis of Viologen‐based Copolymers for High Performance Li‐Dual‐Ion Batteries

“…[6] Pyrene-4,5,9,10-tetraone (PTO) and anthraquinone (AQ) are two typical quinone compounds with excellent conjugation, medium working potential for storing Li + and representative high theoretical specific capacity of 409 mAh g À 1 and 257 mAh g À 1 . [36][37][38][39][40][41][42][43][44][45] However, such small molecules containing multiple redox groups usually suffer a fast capacity decay due to their high solubility in organic electrolytes. Consequently, polymerization of redox active small molecules has been developed to suppress the sever dissolution.…”