• 文献标题:   High-Quality Graphene Microflower Design for High-Performance Li-S and Al-Ion Batteries
  • 文献类型:   Article
  • 作  者:   CHEN H, CHEN C, LIU YJ, ZHAO XL, ANANTH N, ZHENG BN, PENG L, HUANG TQ, GAO WW, GAO C
  • 作者关键词:   alion batterie, defectfree, highquality graphene microflower, largescale production, lithiumsulfur batterie
  • 出版物名称:   ADVANCED ENERGY MATERIALS
  • ISSN:   1614-6832 EI 1614-6840
  • 通讯作者地址:   Zhejiang Univ
  • 被引频次:   63
  • DOI:   10.1002/aenm.201700051
  • 出版年:   2017

▎ 摘  要

Poor quality and insufficient productivity are two main obstacles for the practical application of graphene in electrochemical energy storage. Here, highquality crumpled graphene microflower (GmF) for high-performance electrodes is designed. The GmF possesses four advantages simultaneously: highly crystallized defect-free graphene layers, low stacking degree, sub-millimeter continuous surface, and large productivity with low cost. When utilized as carbon host for sulfur cathode, the GmF-sulfur hybrid delivers decent areal capacities of 5.2 mAh cm(-2) at 0.1 C and 3.8 mAh cm(-2) at 0.5 C. When utilized as cathode of Al-ion battery, the GmF affords a high capacity of 100 mAh g(-1) with 100% capacity retention after 5000 cycles and excellent rate capability from 0.1 to 20 A g(-1). This facile and large-scale producible GmF represents a meaningful high-quality graphene powder for practical energy storage technology. Meanwhile, this unique high-quality graphene design provides an effective route to improve electrochemical properties of graphene-based electrodes.