Exploiting Polythiophenyl‐Triazine‐Based Conjugated Microporous Polymer with Superior Lithium‐Storage Performance

Abstract

Conjugated microporous polymers (CMPs) have been heralded as promising energy‐storage materials with advantages such as chemical flexibility, porous structure, and environmentally friendliness. Herein, a novel conjugated microporous polymer was synthesized by integrating triazine, thiophene, and benzothiadiazole into a polymer skeleton, and the Li+‐storage performance for the as‐synthesized polymer anode in Li‐ion batteries (LIBs) was investigated. Benefiting from the inherent large surface area, plentiful redox‐active units, and hierarchical porous structure, the polymer anode delivered a high Li+ storage capacity up to 1599 mAh g−1 at a current rate of 50 mA g−1 with an excellent rate behavior (363 mAh g−1 at 5 A g−1) and a long‐term cyclability of 326 mAh g−1 over 1500 cycles at 5 A g−1, implying that the newly developed polymer anode offers a great prospect for next‐generation LIBs.

Rational Design of Stable Four-Electron-Accepting Carbonyl-N-methylpyridinium Species for High-Performance Lithium-Ion Batteries

“…The capacity loss in the first few dozen cycles is mainly ascribed to the electrolyte decomposition and the formation of solid electrolyte interphase (SEI) film, which is often observed for organic battery electrodes. [46][47][48][49][50] The electrodes based on compounds 1, 2, CP1 and CP2 deliver reasonable capacities of 196, 293, 291 and 390 mAh g -1 after 30 cycles. (Figure 4c).…”

Recent Developments of Nanomaterials and Nanostructures for High‐Rate Lithium Ion Batteries

“…Polymerisation can reduce the solubility and thus enhance the stability of the electrodes, but at the expense of capacity loss. [268] It was reported by Wang et al that one of the small molecules, maleic acid, can be applied as the anode with no modification. [269] As shown in Figure 27d, high reversible capacity (570.8 mAh g À 1 ) was achieved even at a high level of current density (46.2 A g À 1 ), which was partially due to the small volume effect and the low impedance.…”

“…In addition, organic electrodes normally have poor cycling stability, which is partially due to the high solubility of small molecules in electrolytes at high current densities. Polymerisation can reduce the solubility and thus enhance the stability of the electrodes, but at the expense of capacity loss . It was reported by Wang et al.…”

Redox Donor–Acceptor Conjugated Microporous Polymers as Ultralong‐Lived Organic Anodes for Rechargeable Air Batteries

“…[16,18,19] To date,s ince the first report on CMP-based cathodes for Li-ion batteries by Jiang et al, [20] CMPs have been exploited as organic electrodes for some energy storage applications such as organic Na-/Li-/K-ion batteries. [18][19][20][21][22][23][24][25][26][27][28][29] Despite appealing potential, to our knowledge, the utilization of CMP as anodes for rechargeable air batteries has not been explored.…”