Conjugated microporous polymer derived N, O and S co-doped sheet-like carbon materials as anode materials for high-performance lithium-ion batteries

Rational design and preparation of nitrogen (N), oxygen (O), and sulfur (S) co-doped materials with distinguished electrochemical performance in lithium-ion batteries are highly sensible. In this study, layered structure carbon material (PTPAO@600) with co-doped N, O and S elements is prepared by carbonizing conjugated microporous polymers (CMPs) as a precursor. When PTPAO@600 electrode material employed as anode of LIBs, and evaluated its properties in electrochemical aspects. After cycling for 800 times under 0.1 A g (1), PTPAO@600 electrode has shown powerful reversible specific capacity of 1142.5 mAh g (1), and excellent rate capability of 275 mAh g (1) at 2.0 A g (1) large current density. Long-cycle performance for 1000 charge/discharge cycles shows that the capacity is retained at 490.9 mAh g (1) under 1.0 A g (1), revealing its high stability. Such high lithium storage performance is mainly attributed to rich heteroatom co-doping, larger specific surface area and high Li+ diffusion coefficient. The superior electrochemical performance makes the PTPAO@600 a anode material with potential in secondary batteries. (c) 2022 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.

Automated summary

In this study, nitrogen, oxygen, and sulfur co-doped layered structure carbon material (PTPAO@600) was prepared and evaluated as an anode material for lithium-ion batteries. The results showed that PTPAO@600 exhibited excellent reversible specific capacity, rate capability, and cycling stability, which can be attributed to the co-doping of heteroatoms, larger specific surface area, and high Li+ diffusion coefficient.