• 文献标题:   Structure-Performance relationship guided design and strategic synthesis of lithiated oxa-graphene for high lithium storage
  • 文献类型:   Article
  • 作  者:   LI ZX, LIU NX, WANG J, XU YQ, BAI L, JIANG L, CUI L, SHEN CS, LIU XS, ZHAO FG
  • 作者关键词:   graphene carboxylation, graphene sulfonation, graphene functionalization, graphene lithium storage, graphene structureperformance nbsp, relationship
  • 出版物名称:   JOURNAL OF COLLOID INTERFACE SCIENCE
  • ISSN:   0021-9797 EI 1095-7103
  • 通讯作者地址:  
  • 被引频次:   1
  • DOI:   10.1016/j.jcis.2022.12.140 EA JAN 2023
  • 出版年:   2023

▎ 摘  要

Graphene derivative materials are widely used as anode component in lithium-ion batteries. However, there is still a lack of reliable and foresighted guides helpful for designing high-performance graphene-based electrode materials. To this end, we strategically chose challenging graphite fluoride as starting material for the derivatization of graphene in order to exclude interference factors. As a result, graphene framework was functionalized with oxygen-containing carboxylate and sulfonate groups and oxygen-free aniline units at a similar functionalization degree. Due to the strong effect of lithiation, out-of-plane p-aminobenzoic acid blocks boosted the lithium-storage capacity of graphene matrix to 636 mAh g = 1 at 0.1 A/g, and sulfanilic acid blocks maximized this value to 873 mAh g = 1. Sadly, oxygen-free aniline functionalized graphene material only delivered a specific capacity of 88 mAh g = 1. Meanwhile, spatial lithiated carboxylate and sulfonate units endowed graphene framework with better rate capability and cycling stability. Such a structure-performance relationship established herein was beneficial for the design and preparation of high-performance graphene derivative electrode materials. (c) 2022 Elsevier Inc. All rights reserved.