文献类型：期刊文献

英文题名：Heteroatom dopant strategy triggered high-potential plateau to non- graphitized carbon with highly disordered microstructure for high- performance sodium ion storage

作者：Zhang, Peilin[1,2];Huang, Chen[1];Xiu, Mingzhen[3];Zhu, Siyu[2];Wang, Weiwei[1];Zhu, Bo[1];Qin, Likang[1];Huang, Yizhong[2];Chen, Luyang[1]

机构：[1]East China Univ Sci & Technol, Minist Educ, Sch Mat Sci & Engn, Key Lab Ultrafine Mat, Shanghai 200237, Peoples R China;[2]Nanyang Technol Univ, Sch Mat Sci & Engn, 50 Nanyang Ave, Singapore 639798, Singapore;[3]Nanyang Technol Univ, Energy Res Inst, Interdisciplinary Grad Programme, Singapore, Singapore

年份：2023

卷号：79

起止页码：192

外文期刊名：JOURNAL OF ENERGY CHEMISTRY

收录：;EI(收录号：20230613541466);WOS:【SCI-EXPANDED(收录号:WOS:000963662300001)】；

基金：This work was supported by the National Natural Science Foundation of China (52272296, 51502092) , the Fundamental Research Funds for the Central Universities (JKD01211601, 1222201718002) , the National Overseas High -Level Talent Youth Program in China, and the Eastern Scholar Project of Shanghai.

语种：英文

外文关键词：Non-graphitized carbon; Highly disordered microstructure; Heteroatom dopant; Adsorption; Redox reaction

摘要：Non-graphitized carbon (NGC) has been extensively utilized as carbonaceous anode in sodium-ion bat-teries (SIBs). However, more optimization to achieve competitive capacity and stability is still challenging for SIBs. In the study, the dopant strategy is utilized to construct nitrogen/sulfur-doped non-graphitized carbon (N-NGC or S-NGC) shell decorated on three-dimensional graphene foam (GF) as a self-support electrode. The highly disordered microstructures of heteroatom doped carbons are produced by applying a low-temperature pyrolysis treatment to precursors containing nitrogen and sulfur. The DFT calculations of Na-ion adsorption energies at diverse heteroatom sites show marginal-S, pyrrolic N and pyridinic N with more intensive Na-ion adsorption ability than middle-S, C@O and pristine carbon. The N-NGC with dominant small graphitic regions delivers adsorption ability to Na-ion, while the S-NGC with significant single carbon lattice stripes demonstrates redox reaction with Na-ion. Evidently, in comparison with only adsorption-driven slope regions at high potential for N-NGC, the redox reaction-generated potential-plateau enables non-graphitized S-NGC superior discharge/charge capacity and cycle-stability in the slope region. This work could provide deep insight into the rational design of non-graphitized carbon with rich microstructure and composition.(c) 2023 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by ELSEVIER B.V. and Science Press. All rights reserved.