Cross-linked copolymer-derived nitrogen-doped hierarchical porous carbon with high-performance lithium storage capability. Issue 16 (28th July 2022)

• Record Type: Journal Article
• Authors: Luo, Rui; Wan, Zhengwei; Mei, Peng; Xie, Zhengjiao; Shi, Dean; Yang, Yingkui
• Is Part Of: Materials advances. Volume 3:Issue 16(2022)
• Page Start: 6636
• Page End: 6642
• Publication Date: 2022-07-28
• Subjects: 620.11
• DOI: 10.1039/d2ma00310d
• Languages: English
• ISSNs: 2633-5409

Abstract

Abstract : A hierarchically porous carbon material with N-doping has been developed by a synchronous activation–carbonization tactic using a cross-linked N-containing copolymer as the precursor, demonstrating tremendous potential as an alternative LIBs anode. Abstract : Here we describe a facile, low-cost, and scalable synthesis of nitrogen-doped hierarchical porous carbon (N-HPC) through a contemporaneous carbonization–activation process of a cross-linked polymer obtained by the one-step copolymerization of divinylbenzene (DVB) and 1-vinylimidazole (VI) monomers. The as-prepared N-HPC features a high surface area of up to 1685 m 2 g −1 with the coexistence of abundant micro-, meso-, and macropores. When applied in lithium-ion batteries (LIBs), the N-HPC anode exhibits superior initial reversal capacity (1045.9 mA h g −1 at 0.1 A g −1 ), cyclic stability (retention of 73.6% at 2 A g −1 after 1000 cycles) and rate capability (450.5 mA h g −1 at 2 A g −1 ) on account of its architectural and compositional superiority compared with either the HPC material carbonized from the self-polymerization product of DVB or commercial graphite. We believe that this work can provide new impetus to the large-scale implementation of high-performance and affordable LIBs that are pivotal in the sustainable development of our society.